Russian No.8 usually blooms in the black pearl land at the end of May and the beginning of April, and the flowering period is about 7 days.

Black pearl is a self-pollinating variety, while Russian 8 is a new variety. E-8 has obvious advantages in planting, high cold resistance, moderate tree vigor, much better tree vigor control than other varieties, and fruits can be seen in three years under the condition of excellent soil environment, with a long fruit-bearing period.