When is the critical period for flower and fruit retention in grapes?

During the period of flower and fruit retention in grapes, the supply of all nutrients must be ensured. Trace elements and boron and calcium can be used to promote flower differentiation and growth. This is more helpful for the subsequent fruit-setting rate, and can also strengthen the growth structure of the grapes.

Precautions during the period of flower and fruit retention in grapes

1. To retain flowers and fruit in grapes, the supply of nutrients must first be ensured. During this period, choose to supplement trace elements, such as boron and calcium, because boron can promote the growth and development of the pollen tube, which can greatly help the fruit-setting rate, while calcium fertilizer can promote the toughness of the fruit and its connection with the root and stem, strengthening growth. Therefore, in terms of nutrient supplementation, you can choose a boron-calcium foliar fertilizer that supplies both calcium and boron. Generally, spraying 3-5 times can achieve the effect of flower and fruit retention.

2. On the other hand, when it comes to watering, do not water heavily; apply as little as possible but many times, as this will help pollination. Also, do not choose to apply pesticide during the pollination period of the grapes; avoid the pollen pollination period.

In general, by carefully dealing with the problems that appear in the grapes, basically no other major issues will occur.