Why did Wei Zi decline?

Lagerstroemia indica withered for more than three reasons. First, the soil is uncomfortable. It likes soft soil with good ventilation and drainage performance. If the soil used for cultivation is too sticky, it will hinder root respiration and plants will wither easily, so change the soil as soon as possible. Second, too much watering, root breathing blocked, easy to fade. Control the amount of water and don't water it. Third, lack of nutrients, rapid growth, consumption of nutrients, to timely supplement fertilizer.