Blackberry has several stages of growth.

Blackberry has three growth stages. The growth and development of blackberry can be divided into three stages. The first stage is the rapid growth period, lasting 9 ~ 12 days. The fruit expands rapidly, and the contents of various nutrients decrease. The second stage is the slow growth period, which lasts the longest, reaching 24 days. Except for the rapid increase of total acid content, other morphological and quality indexes have not changed much. The third stage is maturity, which lasts for the shortest time, only 6 to 9 days.