Knowledge of planting flowers in April

In April, with the weakening of the cold air from the north to the south, the warm and humid airflow in the south became stronger and stronger, and the temperature rose obviously. After Tomb-Sweeping Day, although there was occasional cold air going south, it could no longer pose a threat to most potted flowers south of Huaihe River, and only the areas north of Huaihe River and along the Yellow River were in danger of snow and frost. After Grain Rain, the late frost in the south of Jianghuai has ended, the lowest temperature is not less than 5, and the rainfall has obviously increased. Most potted flowers can be moved outdoors for maintenance; In Huaibei area, potted flowers can't go out until the end of the late frost in May. From south to north in April, the flowers bloom as follows: 1. Flower propagation 1. The flowers suitable for planting in April are Buddleja officinalis, Jasmine, Celosia cristata, Goose, Sunflower, Floret, Amaranth, Carthamus tinctorius, Impatiens, Petunia, Dill in Rain Leaf, Dill in Round Leaf, Safflower Tobacco and Petunia. The species of Magnoliaceae flowers and trees that can be sown and stored in sand in April are: Magnolia grandiflora, Magnolia grandiflora, Magnolia officinalis, Andromeda, Magnolia officinalis, Manglietia Manglietia, Manglietia macrocarpa, Euonymus japonicus, Smilax China and Smilax China. Other green flowers and trees that can be planted in April include: Chinese fir, Korean pine, Japanese pine, Lagerstroemia indica, Bauhinia, Albizia Albizzia, Taxus chinensis, Pittosporum, Sapindus mukoraiensis, Liquidambar formosana, Acer truncatum, Chimonanthus praecox, Lycium barbarum and Mume. Ornamental plants that can be picked and sown in April include: hibiscus, asparagus, primrose, winter coral, octagonal gold plate, milk eggplant and so on. Among them, black, white and soft fruits can be picked in an octagonal gold plate at the end of April. After the seeds are washed out, they can be sown on a fertile seedbed or stored in sand until the cracks turn white, and then sown and covered with grass to keep moisture. Generally, about 70% of the seeds emerge after two weeks, so it is necessary to remove the plastic film in time and set up a shed for shade; Planting Solanum lyratum Thunb. Peel the golden fruit, wash the seeds, soak them in warm water for 24 hours and sow them in fertile sand. 10 days later, the seeds can germinate and be unearthed. When the seedlings grow 6-8 true leaves and the plant height is 15cm, they can be transplanted, potted or planted as special cut flowers. 2. Grafting The species of flowers and trees that can be grafted in April are: Chimonanthus praecox, Sophora japonica, peach blossom, locust, cactus, begonia and so on. In March and April, the foliage plants that can be propagated in the greenhouse include: white crane taro, tiger tail orchid, herba Eupatorii, bracken, brown bamboo, chlorophytum, agave, Yindi Evergreen, Evergreen, Guangdong Evergreen, arrowroot, aloe, pepper, turtle back bamboo, spring feather and so on. Greenhouse flowers that can be independently planted and propagated include Clivia, colored pineapple, bracken, hibiscus, purple calyx, cattleya, four seasons orchid, Dendrobium, Cymbidium hybridum, Primula, Cymbidium hybridum, Begonia and so on. Suitable bulbous flowers and perennial flowers include Dahlia, taro, canna, lily, tennis flower, Zhu Dinghong, Hosta, iris, Belamcanda, tuberose, carnelian, day lily and onion. In addition, water lilies and water lilies can also be divided at this time. Cut. As long as the leaves and buds that are easy to take root in most flowers and trees have not germinated, cutting propagation can be carried out in April. The main types are: boxwood, Mahonia, Nandina domestica, Cypress, Podocarpus, Pomegranate, Lagerstroemia indica, Bauhinia, Pyracantha fortunei, Spiraea, Liriodendron chinense, Snowdrop, Toona sinensis, Begonia and so on. 2. Pot replacement and transplantation 1. Pots that cannot be changed in March can be changed in April, as long as the tip is not too long, or when changing pots, there is too much soil and the roots should not be broken. However, it should be pointed out that deciduous flowers and trees, especially plum blossoms, should never change pots after the leaves are unfolded.

April is the best time to transplant flowers and trees in the wild. Deciduous flowers and evergreen flowers can be transplanted with soil balls in April as long as the leaf buds are not spread out or the shoots are not long. Evergreen flowers and trees, such as Cinnamomum camphora, Magnolia grandiflora, Michelia, White Orchid, etc. Some branches and leaves must be pruned to reduce the transpiration of water in the crown; For deciduous flowers and trees, it is best to transplant them when the leaves are not exposed, such as Magnolia grandiflora, Aesculus chinensis, Tilia amurensis, Begonia, Chimonanthus praecox, ornamental peaches, plums and apricots. Usually, the diameter of the soil ball of transplanted flowers and trees should not be less than 6 times the diameter of the trunk of transplanted flowers and trees, so that the transplanted flowers and trees will not destroy the soil ball and have no worries. Third, bonsai modeling April is one of the best time periods for bonsai modeling. The most suitable ornamental plants for beginners to practice modeling are those with strong adaptability, whose branches can withstand the repeated twisting of beginners without seriously affecting their normal growth, such as Podocarpus, Bai Cui, Snow Willow, Myrica rubra, Sabina vulgaris, Buxus macrophylla, Wei Zi, Sabina vulgaris, Cypress, Banyan, Buxus japonicus, Elm, Yingchun, Xiang Jie, Ginkgo biloba, Pinus thunbergii, Zizania latifolia and so on. Other types suitable for modeling in April include wild hawthorn, pine needles, Pinus ponderosa, peach, pyracantha, Fraxinus mandshurica, white tea, oak, Galois, marble, begonia, Fujian tea, papaya, Elaeagnus elaeagnus, Ilex cornuta, Korean pine and tiger thorn. With the vigorous growth of bonsai plants, it is necessary to use metal wires or non-metal wires in time and constantly pull and correct them to keep them in a good ornamental state. This month, the maintenance of five-needle pine bonsai should pay special attention to the following three aspects: First, pick buds in time. When winter buds germinate and granular needle-like primordia appear on them, 1/2 ~ 2/3 of the bud length can be removed, which will make the new buds shorter and denser. The second is to erase the jerseys of men and women. When the new shoots can distinguish between needle bundles and male and female cones, the female cones at the top and the male cones at the base of the new shoots should be erased in time to reduce the consumption of nutrients during reproductive growth. Third, we should control watering. Starting from the new shoot, we should strictly control watering, so as to spray instead of watering, ensure the short cluster of newly drawn needles and keep the branches straight and good. Four. Fertilization management 1 Fertilization consumes a lot of nutrients for potted camellia, camellia, Chimonanthus praecox, Rhododendron, Yingchun, Admiralty, Daphne Daphne, Kumquat, Crataegus, Winter Coral, Begonia, Cymbidium hybridum, Primula, Astragalus, etc. Because they blossom or bear fruit, they need to resume growth after a warm spring. For potted flower varieties that are about to bloom, such as rose, bauhinia, pomegranate, cymbidium, hibiscus, cymbidium and so on, topdressing is also needed. The variety can be potassium dihydrogen phosphate, and the concentration can be controlled at about 0.2%. Magnolia grandiflora, Magnolia grandiflora, Michelia, Plum Blossom, Chimonanthus praecox and Begonia are planted on the ground. After the flowers wither, they should also be fertilized in time to meet the needs of their vegetative growth. 2. Shaping and maintaining the rich tree can be braided in April. Dig out the seedlings of rich trees that have been sown or bought, put them in the shade 1 to 2 days to dehydrate them, then braid them with odd-numbered trunks of 3, 5 and 7, press them with heavy objects after braiding them, and select suitable potted plants after fixing their shapes; Rich trees have strong vitality. Even if it is too late to weave or plant, it will not affect their future survival and normal growth if they are scattered for 3 to 5 days. 3. Adjust plant type to prevent diseases. For potted flowers moved out of the house, dead branches, yellow leaves and withered leaves should be eliminated in time, plant types should be adjusted, and water and fertilizer management should be strengthened; For flower seeds prone to diseases, sulfur mixture or Bordeaux mixture should be sprayed in time to prevent possible diseases. 4. Fruit-viewing potted management is aimed at potted fruit-viewing flowers and trees that bloom in April, such as papaya, ginkgo, pyracantha, peach coral and begonia. , especially dioecious or cross-pollinated varieties, should pay attention to when flowering.

5. Management of cutting seedbed. Before the newly cut ornamental plants form healing tissues, special attention should be paid to water spraying management. In addition to the intermittent spraying device, water must be sprayed 2~3 times a day to keep the cutting substrate moist all the time and create the best environment for its healing and rooting.