Small knowledge of flower and plant protection

Summer is the season of vigorous seedling growth, which generally accounts for 60%~80% of the total annual growth, and it is also the most serious season of drought, pests and diseases.

As the saying goes; Trees are planted in three parts and seven parts. Post-planting management is the key to the survival of trees.

After planting trees in spring, although the seedlings germinate and spread branches soon after planting, the roots of the seedlings are damaged during feeding, and the water and nutrients they carry are limited. In the hot summer and high temperature environment, it is necessary to replenish water and nutrients to the seedlings planted in spring in a timely, effective and timely manner to ensure the normal growth of seedlings. The following are some key points on how to maintain and manage seedlings in summer for your reference: First, irrigate and spray water in time to keep trees and soil moist, and the temperature is high in summer and the water evaporates quickly. When the seedlings suffer from drought, they should be irrigated with water or watered artificially, and the seedbed should be thoroughly watered to keep the soil moist.

The watering frequency and interval days should be decided according to the actual situation. If it rains several times after planting, you can reduce the amount and frequency of watering.

If it continues to be hot and rainy, it is necessary to increase irrigation. The amount of irrigation should not be too much or too little at a time, otherwise the roots will soak or suffer from drought, which will affect the survival of transplanted trees.

Second, loosen the soil and weed in time. After every rain or irrigation, loosen the soil and weed in time. It is inconvenient to loosen the soil when sowing seedlings. Weeds between seedlings can be pulled out, and then a layer of fine soil is covered on the bed surface to prevent the roots from being exposed. Tillage should be deepened step by step, but seedlings should not be damaged or pressed, and seedlings roots should not be damaged when weeding.

According to the experiment, the surface temperature of loosening soil at noon on sunny days is about 8℃ higher than that of non-loosening soil, so it is not suitable to loosen soil at noon on sunny days with high temperature and drought, and it is best to do it in the morning, evening or after rain on cloudy days. Third, the method of fertilization should be appropriate. Fertilization concentration should not be too high, and too much should not be applied at one time.

Water or lightly apply water and fertilizer in the morning and evening, and never sprinkle chemical fertilizer between seedlings. Water and fertilizer can be applied after loosening the soil and weeding.

Fourth, pay attention to insect prevention. Summer seedlings are prone to Fusarium wilt, root rot, leaf eaters and bud eaters. When rice sheath blight and root rot occur, it can be controlled by spraying Ji and ethylicin 1500 times solution and thiophanate-methyl. When leaf-eating and bud-eating pests occur, they can be controlled by spraying 600 times of catching liquid. Underground pests, such as grubs and crickets. You can spray green peppers and water them, or you can catch them manually. At the same time, strictly do a good job in the prevention and control of American white moth (confidential insecticide for killing moths).

5. Spacing and fixing seedlings in time. Intercropping should be carried out after rain or irrigation.

For seedlings that are too dense, poorly grown, stunted, injured and have diseases and insect pests, and "overlord seedlings" that affect the growth of most surrounding seedlings, fast-growing broad-leaved trees need to be interplanted 1-2 times, and slow-growing conifers such as cypress trees should not set seedlings prematurely, and seedlings can be set after 2-3 times. After thinning, it is best to water with dilute manure to improve the survival rate of seedlings.

6. Shading is also very important. Too high temperature is not conducive to the growth of seedlings. After shading, the surface temperature can be reduced by about 65438 00℃. Therefore, where conditions permit, the seedlings should be shaded to facilitate their growth.

Newly planted trees in early spring can generally spread their branches and leaves at the beginning of the growing season, but some of them are not really alive, but "fake". Once the temperature rises and water is lost, this "fake" plant will wither, and if it is not rescued in time, it will die in the hot and dry season. Therefore, the survival of newly planted trees can be determined at least after the first year of high temperature and drought.

2. What is the common sense of raising some potted plants?

Basic method of potted flowers-common sense of flower conservation

1, on the basin. Pot-feeding refers to the selection of flowerpots with appropriate specifications according to the size of seedlings. First, cover a small tile on the drain hole at the bottom of the pot, with the concave surface facing down, which is beneficial to drainage; Then fill a layer of coarse sand, cover it with a layer of culture soil, put the seedlings in a pot, and adjust the height of the culture soil to make the position of the flower seedlings suitable; Then fill the soil around the basin and tamp it, so as to keep a proper distance between the mouth of the basin and the soil surface for watering. After planting, fully water with a watering can, and place the seedlings in the shade for 3-7 days.

2. Change pots. Changing pots means changing potted flowers into another pot. There are two ways to change pots: first, because the seedlings grow up and the roots are filled with soil in the pots, the growth is limited, so it is necessary to change from small pots to large pots to expand the nutrient area of the roots; Secondly, the soil in the basin has been absorbed and utilized by flowers for a long time, and the nutrients are lacking and the physical properties are deteriorating, which is not conducive to the continued growth of flowers. Need to change the new soil, that is, only change the soil without changing the pot.

The frequency of changing pots varies with the kind of flowers. Annual and biennial flowers grow rapidly, and generally need to change pots 2-4 times before flowering. Perennial flowers change pots 65,438+0 times a year, and woody flowers often change pots 65,438+0 times every 2-3 years. The time for changing pots mostly begins in spring and is carried out before growth. Evergreen trees can also be planted in rainy season. It is not suitable to change pots at flowering stage or flowering stage.

Don't water before changing pots, let the soil dry properly, and the mud is easy to pour out. When changing pots, separate your fingers with your left hand, press the plant base on the pot surface, pick up the flowerpot upside down, and tap the bottom of the pot with your right hand or tap the edge of the pot on a hard object to loosen the soil and pour it out. If it's a big pot, you can turn it upside down on the board, tap the edge of the pot to loosen the mud, and then lift it with your hand. After the soil is taken out, the annual or biennial flowers can be directly replaced by large pots, and the surrounding soil can be filled; Perennial flowers should scrape off some old soil around the soil, trim off old roots and dead roots with scissors, and divide plants at the same time. After changing pots, water them sufficiently to make the soil closely connected with the root system, and then just keep the soil moist. Don't pour too much water when changing pots to prevent root wounds from rotting. For some varieties with fleshy roots, such as orchids and clivia, the roots should be cleaned after changing pots, and then put into pots after drying in the shade. Shade should be placed in the early stage of changing pots to prevent excessive transpiration and death.

3, loose basin. That is, using bamboo chips or small iron harrows to loosen the topsoil and ensure air permeability is not only beneficial to watering and fertilization, but also seems to remove moss and weeds and prevent the topsoil from hardening.

4. Fertilize. The growth quality of potted flowers depends on fertilization to some extent. When putting or changing pots, basic fertilizers such as hoof pieces, bone meal and cake fertilizer are often applied; Often topdressing during the growing period; Top dressing should be applied with decomposed cake fertilizer water, alum fertilizer water or quick-acting chemical fertilizer. The preparation method of alum fertilizer water is as follows: 2.5-3 kg of ferrous sulfate, 5-6 kg of bean cake, 65,438+00-65,438+05 kg of dry manure and 200-250 liters of water, which are mixed in a vat, exposed to the sun for 20 days, and used after being completely decomposed and blackened. Use its supernatant every time, and then add clean water into the cylinder. When the fertilizer solution is thin, add new raw materials. Fertilization is mostly carried out in the evening of the growing season, and thin fertilizer should be applied frequently to avoid thick fertilizer and big fertilizer.

5. water. Watering is an important management measure in flower cultivation. Different flowers have different water requirements, even the same flower has different water requirements in different growth periods and different seasons, so watering should be treated differently according to specific conditions.

The general principle of watering is: no watering in the morning and evening, no airing, and thorough watering. Don't let water wet half a pot, so that the roots at the bottom of the flowerpot can't get water, which will affect the growth. For ferns, orchids, begonia and other flowers that like humidity, water more; But fleshy flowers like to be dry, so water them less. In the vigorous growth period of flowers, water should be sufficient, and in the dormant period, water should be reduced or stopped.

The amount of watering varies greatly in different seasons. The weather gets warmer in spring, and there is more water than in winter. Herb flowers should be watered every 1-2 days/time, and woody flowers should be watered every 3-4 days/time. In summer, the weather is hot and the evaporation is large. Generally, flowers should be watered in the morning and evening 1 time. When the weather turns cold in autumn, it can be reduced to 1 time in 2-3 days. The amount of watering in winter depends on the kind of flowers and indoor temperature, generally watering at 2 ~ 5 o'clock 1 time.

3. Common flower conservation skills

Bsp sterilization method: add alcohol, potassium permanganate, camphor, boric acid, citric acid, salt, alum, etc. Putting it in water can play a role in sterilization. Only when water does not rot can plants absorb water and keep fresh. Note: it must be prepared into solution before use, and it must not be directly put into water without dissolution. When using salt, be careful not to have too high a concentration.

Nutrition method: after the flowers are cut from the mother, they lose their source of nutrition. Nutrients such as sugar, beer, aspirin and vitamin C can be added.

Spray injection method: for many flowers with hollow stems, you can put the flower feet under the faucet to force irrigation.

Precautions:

1. Keep the water clean: change the water every day, and cut the roots and expose new stubble every day. Remove the excess leaves soaked in water.

2. Stay away from accelerant _ ethylene: Stay away from vegetables and fruits, because they will release a lot of ethylene, which will lead to the withering of flowers. At the same time, the fallen flowers and fruits will be cleaned up in time.

3. Fresh-keeping temperature: 5 degrees for common flowers and 10- 12 degrees for tropical flowers.

4. Location: Away from direct sunlight in summer and away from the air outlet in winter.

4. Common sense of green plant maintenance

There is nothing wrong with dripping Guanyin, also known as dripping lotus. However, please don't forget that its leaves can drip, which is a self-regulating function in itself. Therefore, when cultivating this kind of flowers, the main thing to pay attention to is the mastery of soil moisture. When watering flowers, pay attention to "water them thoroughly if you don't do it". In particular, the underground stem of dripping Guanyin is easy to rot. If it is often wet or even wet, the leaves will naturally turn yellow. The whole plant may even die. There is another important point, but it is often ignored by everyone. The so-called shade-loving plants don't dislike sunlight at all, they need scattered light, and there are many. However, as soon as people hear that they like the shade, they ignore the eternal truth that "plants grow on the sun", which makes plants that lack light because they are cultivated indoors get less sunlight, which is very noteworthy. Drip Guanyin, formerly known as Haizhu.

In addition, this thing, flowerpots, is interesting. The longer the leaves, the bigger they are, depending on your own preferences. Water the moon more in April-May, water the pot soil immediately when it is dry in summer, water it more around September, water it less when it is dry in winter, and often spray water on the leaves.

The climate in the north should be raised like this. Drip Guanyin is an indoor foliage plant. Leaf-watching plants have larger leaves, stronger transpiration, greater transpiration and more water released into the air.

The dry weather makes everything in a state of water shortage, so keep a pot of dripping Guanyin at home this season, and you can breathe moist air when you go home. However, its juice is toxic, so it should be prevented from dripping into eyes or taking it by mistake, causing sore throat or eye inflammation.

The optimum growth temperature of Drip Guanyin is 20-25℃, and it likes warm, humid and semi-cloudy environment. Therefore, in the growing season, it should be placed in the shade of the balcony or courtyard (avoid direct sunlight in summer), and the soil in the basin should be kept moist frequently, and the dilute liquid fertilizer mainly composed of nitrogen fertilizer and mixed with phosphorus and potassium fertilizer should be applied 1-2 times a month (stop fertilization in winter and control watering). Drip Guanyin likes big water and big fertilizer, loose rotten soil or sandy loam, and plenty of light. In addition to the hot summer, it is best to have all-day sunshine in other seasons. In addition, Drip Guanyin especially likes the high temperature and high humidity climate. Spray water on the leaves at noon every summer to increase the air humidity. Only in this way can the leaves of dripping Guanyin be big and thick, too shady, the leaves will increase but become thinner, the petiole will be brittle, and the petiole will be too long and broken.

Drip Guanyin should be placed in a bright room, such as a window, which needs at least 3 to 5 hours of light every day. As long as the light is bright, you can't expose yourself to the sun.

Drip Guanyin likes water. If the leaves become soft, they should be watered. Pouring a little ferrous sulfate regularly can make the leaves greener, bigger and thicker.

So although it is toxic, it is still useful to purify the air. Don't let children touch it when you put it indoors. Just be careful yourself. Drip Guanyin is a very common green potted plant in China, but because it is a tropical plant, it generally does not bloom in the north.

But if the temperature and other conditions at home are right, it will also bloom. The soil requirement is not high, but it grows best in sandy loam or humus loam with good drainage and rich organic matter.

Because Drip Guanyin naturally likes warm, humid and semi-cloudy environment and is not cold-resistant, it is necessary to keep the basin soil moist during the growing season. If it is summer, the flowerpot should be placed in a semi-cool and ventilated place, and water should be sprayed to the surroundings and leaves frequently to increase the air humidity, reduce the temperature of the leaves and keep the leaves clean.

Because the growth rate of Drip Guanyin is very fast, in the process of growth, fertilization must be appropriate, and it is good to apply nitrogen, phosphorus and potassium 1-2 thin fertilizer every month, otherwise it will easily lead to baldness at the lower end of the stem of Drip Guanyin and affect its ornamental value. If you want to keep the dripping Guanyin small and exquisite indoors, just wait until its seedlings are one foot long and suitable for home placement, and immediately spray the whole plant with 2% paclobutrazol solution. After that, the stems and leaves are no more than 40 cm high, with thick leaves and high ornamental value.

Spraying medicine once every six months or so can play a good role in controlling height. Remind flower friends that the juice in the stem of dripping Guanyin is toxic, and dripping water is also toxic. If you accidentally touch or eat its juice, it will cause discomfort in the throat and mouth, and there will be a burning sensation in the stomach.

There are several reasons for the yellowing or drooping of the leaves of Alocasia alopecuroides (dripping Guanyin): 1, watering is "half-watered", that is, watering is not thorough, and there is water seepage without watering to the bottom of the basin. 2, the winter is cold, and the root system has been frostbitten.

After winter, I am eager to go out of the room and bask in the sun in a warm place, but I can't adapt to the sudden climate for a while. 4. The pot soil is too wet or too dry for a long time, and it is not watered when it is dry.

5. Long-term exposure to poor ventilation. 6. Leaves are not washed by water for a long time, and dust accumulates, which hinders photosynthesis.

Maintenance: Drip Guanyin likes a warm, humid and slightly cloudy environment, but the flowering period should be sunny, otherwise the Buddha buds will turn green and affect the quality. Ensure 3-5 hours of light every day, otherwise the petiole will lengthen and affect the ornamental value.

Drip Guanyin is not cold-tolerant, and 5438+ 10 will move into the greenhouse in the middle of October. In summer, you need to spray water frequently to cool and moisturize in the shade.

Drip Guanyin likes moist and fertile soil, which is often called "big fat water" Water more during the growing period. Topdressing can be applied alternately with liquid fertilizer such as decomposed bean cake water and chemical fertilizer (compound fertilizer or diammonium phosphate) once every two weeks.

When topdressing liquid fertilizer, it is forbidden to pour fertilizer water into the leaf sheath to avoid rot. The application of ferrous sulfate in potted dripping Guanyin can make the leaves of dripping Guanyin bigger, thicker, greener, smooth and shiny, and the petiole is not easy to elongate, thus ensuring the beauty of the leaves.

At the same time, it can promote the formation of flower buds and prolong the flowering period. The specific method is: dilute ferrous sulfate into 2% solution, pour it once every 1 month, and pour it thoroughly every time.

If the pot substrate is too alkaline or the nutrition update is not timely due to long-term non-replacement of soil, the leaves of the plant will turn yellow and inverted; Change pots: After Tomb-Sweeping Day in the second year, move the alocasia alopecuroides out of the house to plant plants to receive sunlight, carry out photosynthesis, and quickly resume growth. Change the basin after 2 weeks.

Wet the pot soil, then remove the root soil, cut off the diseased roots and rotten roots, then put it on the pot, cover the new soil with base fertilizer, pour the root water thoroughly, then put it in the shade for about 1 week, and water it 1 time after 2-3 days.

5. Common sense of green plant protection

Temperature: The suitable temperature for most indoor foliage plants and flowers is 10-30℃. If the temperature exceeds this range, the growth of flowers will be inhibited, and if the temperature is lower than 5℃ or higher than 50℃, flowers will die. Tropical flowers have poor low temperature tolerance, while cold flowers have poor high temperature tolerance. Therefore, it is necessary to prevent cold in winter and shade in summer. Light: Light is the source of photosynthesis of green plants and flowers. Different plants and flowers have different requirements on the intensity, length and quality of light. Generally, indoor foliage plants and flowers like shade, so they should avoid exposure to the hot sun, but they should also keep proper illumination.

Water management: foliage plants have different requirements for water, but in general, they should avoid being too wet. Too wet can also lead to false growth, rotten roots and death; Overwork can lead to wilting, yellowing of leaves and even death.

Water quantity: Potted plants and flowers should be thoroughly watered until the bottom just flows out. Water more in summer. Generally, herbaceous flowers need more water than woody flowers; The water demand of flowers in the south is greater than that in the north; Flowers with big soft and smooth leaves need a lot of water. Water should be controlled in autumn and winter to keep the soil dry.

Water quality: It is best to use soft water such as rainwater and river water. Hard water is usually weakly alkaline, and inorganic salts such as calcium and magnesium will endanger the normal physiological activities of plants and flowers, especially the southern flowers will be inhibited under alkaline conditions, leading to aging and death. Tap water is mostly hard water and should be stored for 5-7 days before use.

Water temperature: the difference between water temperature and air temperature should not be large, otherwise the sudden change of soil temperature will hinder the root activities of green plants and flowers, weaken water absorption and cause physiological drought.

Watering method: Most green plants like to spray water, which can reduce temperature, increase humidity, reduce evaporation, wash away dust on leaves and improve photosynthesis, but it is not suitable for blooming flowers and flowers with more fluff to spray water.

Soil and fertilization: The soil where green plants and flowers grow needs good structure, sufficient fertilizer and suitable pH value. A good structure is mainly loose texture, good water absorption and drainage, strong water retention and good air permeability. Fertility depends on the contents of nitrogen, phosphorus, potassium and trace elements. Nitrogen promotes the growth of leaves, phosphorus promotes the growth of flowers and fruits, and potassium promotes the development of roots. Insufficient fertility will lead to yellowing and death. Fertilization is usually once every two months. After autumn, nitrogen fertilizer should be stopped and potassium fertilizer should be applied more, which is beneficial to overwintering.

Pest control: The diseases of green plants and flowers mainly include soot disease, powdery mildew, iron deficiency chlorosis and so on. In case of diseases, it is necessary to remove diseased leaves and plants in time, improve ventilation and light transmission, strengthen soil, fertilizer and water management, clean diseased leaves and branches, and spray a certain proportion of drugs such as vinegar and carbendazim when necessary.

The pests of green plants and flowers mainly include aphids, scale insects and red spiders. When it is light, it can be washed with water, and when it is heavy, it can be sprayed with chemicals.

6. Flower cultivation methods

Family flower cultivation knowledge-family flower cultivation and watering suggestions: choose natural water sources such as lake water and river water to water flowers. If tap water is used, it should be left for more than 24 hours.

Family gardening and watering should follow the principle of "seven more and seven less": 1, more herbs and less woody. Flowers have shallow roots, poor water absorption capacity, large water demand in the body and rapid evaporation of leaves, so water should be more and more diligent. In summer, besides daily watering, foliar water should be sprayed.

Woody flowers have deep roots, wide distribution, strong water absorption and less watering. Generally, water every other day in summer 1 time.

2. Water more wet flowers, less dried flowers and less dried flowers: water more wet flowers, such as Dendrocalamus giganteus, Reineckea carnea, Tang Changbo and Eclipta prostrata. However, dried flowers such as cactus, Yu Lian, Nandina domestica, Lagerstroemia indica, sisal and Clivia should be watered less.

3, the leaves are big and soft, and the leaves with wax are watered less. The bigger the leaves, the softer the texture, the easier it is for water to evaporate, so water them more. Ye Xiaoyou has wax flowers, and the water on the leaves evaporates slowly, so you can water it moderately and keep the pot soil from being too dry.

4. Water the sandy soil more, water the clay less. The sandy soil is loose and has poor water retention, so it is advisable to water it more. Clay soil is dense, with good water retention and poor air permeability, so it is not appropriate to water it too often.

5. Water more when it is hot, less when it is cold, and less when it is hot in midsummer and summer. Leaf water transpiration is large, and basin soil dries quickly. Watering should be timely and thorough, and don't water it "half-water". Sprinkle water on the ground and leaves when there is dry and hot wind.

In cold weather, low evaporation and winter, flowers grow very slowly or stop growing, so the amount of watering should be less or less. 6. Water more in dry days, less in cloudy days, and the soil is easy to lose water, so water frequently. Water the small pot twice a day, and water the big pot 1 time a day.

On cloudy days, the temperature is high, the water loss on the surface of leaves and soil is less, and the amount of watering is less. 7. Water more in the vigorous period and less in the dormant period. Flowers need a lot of nutrients and water to grow vigorously, so we should combine fertilization, water more and water frequently.

When flowers are dormant, their growth tends to stagnate, and the water demand is very small, so watering should be strictly controlled. Disease control in family flower cultivation is difficult because it is inconvenient to use pesticides in family flower cultivation.

However, we can use some ingenious methods to treat pests and diseases with natural materials around us, which are harmless to people: 1, and spray plant ash leaching solution: soak 300-400g plant ash in 1000g clean water for 2 days, and spray the filtrate on damaged flowers and trees. 2. Onion leaching solution: take 20g fresh onion, crush it, soak it in 1000g clean water 1 day, then filter the solution and spray it continuously for 3-4 times.

3. Garlic juice: 20-30 grams of garlic is mashed, filtered out and diluted with 2000 grams of clear water, which can achieve the purpose of expelling insects, preventing diseases and killing insects. 4. Tobacco extract: 40 grams of tobacco was soaked in 1000 grams of water for 2 days, and the supernatant was taken.

When used, it is diluted with 1000g water and sprayed with branches and leaves to control aphids and red spiders. Root irrigation can control nematodes. 5. Pepper water: 50-100g of pepper is boiled with water, cooled and sprayed with branches and leaves to prevent aphids and red spiders.

6. Detergent: Mix a teaspoon of detergent (or soap or washing powder) with 2000 grams of water, and then wash or spray branches and leaves. But be careful not to pollute the soil.

The method is simple and effective, and has no toxicity or harm to people and no pollution to the environment. Planting flowers and grass indoors can not only beautify the living environment, but also help people resist the pollution of indoor harmful substances and damage to human health.

These flowers and plants can be called "environmental guards" in human rooms. Cactus and cactus can absorb carbon dioxide and harmful gases in the air and release oxygen and negative oxygen ions.

Chlorophytum is an expert in purifying air. A pot of chlorophytum can absorb volatile gases such as carbon dioxide, sulfur dioxide and chlorine peroxide within 24 hours. At the same time, it can absorb 96% carbon monoxide and 86% formaldehyde.

Hupilan can absorb nitrogen oxides and methane gas. Commelina communis has a strong ability to absorb sulfur dioxide.

Aloe can absorb 90% formaldehyde in air 1 m3. Agave can absorb 50% formaldehyde and 24% trichloroethylene.

Ardisia, Ivy and Chrysanthemum can decompose formaldehyde in carpets and thermal insulation materials and plywood and xylene in wallpaper. Under the condition of 24-hour illumination, ivy can also absorb 90% benzene contained in 1 m3 air. Red stork can absorb xylene, toluene and ammonia in chemical fiber and paint.

Dracaena and daisies can remove trichloroethylene. Magnolia grandiflora, Osmanthus fragrans and Chimonanthus praecox can absorb a lot of mercury vapor in the air.

Pomegranate flowers can reduce the lead content in the air. Peppermint not only can resist ozone, but also has bactericidal effect.

Rhizoma arisaematis can absorb 80% benzene and 50% trichloroethylene in the air. Whelan can effectively absorb fluorine and sulfur dioxide in the air.

Rutaceae plants such as kumquat, chrysanthemum and cinnabar are rich in oil bracts, which can inhibit bacteria, effectively prevent mold and prevent colds. Eucalyptus, asparagus, spurge and cactus can kill germs.

Asparagus can also remove heavy metal particles. Ivy, fig, Penglai banana and aloe can not only deal with harmful substances such as bacteria brought back from outdoors, but also absorb dust that is difficult for even a vacuum cleaner to absorb.

Phyllostachys pubescens, Eupatorium odoratum and Eupatorium odoratum can absorb more than 80% of indoor harmful gases. Citrus, rosemary and chlorophytum can greatly reduce bacteria and microorganisms in indoor air.

Roses can absorb more harmful gases, such as hydrogen sulfide, benzene, phenol, hydrogen chloride, ether and so on. Wisteria has strong resistance to sulfur dioxide, chlorine and hydrogen fluoride, and also has certain resistance to chromium.

In order to make potted flowers overwinter safely, flower lovers can take different conservation measures according to the different kinds of flowers they raise. Adjust the appropriate temperature according to the requirements of flowers.

Flowers that like high temperature, such as Milan, Poinsettia, Impatiens africana, Begonia, cactus, etc., should be placed in indoor window sills with sufficient sunshine and high temperature (20℃~ 25℃), and the minimum temperature should not be lower than 10℃. For flowers with moderate temperature preference, such as jasmine, geranium, rose and evergreen, the suitable temperature in winter is 18℃ to 22℃, and the minimum temperature should not be lower than 6℃.

Flowers that like low temperature, such as kumquat, osmanthus, orchids, etc., should keep the temperature between 12℃ and 1 5℃ in winter, and the minimum temperature should not be lower than 2℃. Aquatic flowers, such as lotus, water lily, water hyacinth, water lily, etc. Drainage should be done in time before frost, and the flowerpot should be moved to the ground.