How many years can crape myrtle saplings bloom?

It will bloom in 3-4 years. The flowers of Lagerstroemia indica grow at the top of the spring shoots that germinated that year. Apply shoot-pulling fertilizer in early March, combined with nitrogen, phosphorus and potassium: apply phosphorus and potassium once from late May to early June to strengthen branches and promote flowers; Apply a flowering fertilizer at the end of July and the beginning of September. The fertilizer is cake fertilizer and water to make the flowers bloom brightly. The color of Lagerstroemia indica is very complicated, because different varieties produce more colors. The flowering period of Lagerstroemia indica is from June to September every year, and the flowering period lasts for three months.