Is it normal for crape myrtle to grow red buds in June?

Normal. When Lagerstroemia indica germinates in spring, the green buds are usually tender green, indicating that this Lagerstroemia indica tree is still relatively young, with good growth environment and sufficient nutrition. Red buds are full and dark, usually because Lagerstroemia indica has passed the cold winter and gradually entered the vigorous growth stage. Flowering is also a normal physiological phenomenon, usually because Lagerstroemia indica will constantly differentiate flower buds during its growth and bloom at the right time.