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How do you prune frost grape?
Pruning your frost grape is very important to maintain growth and prevent diseases and pests.
Bud picking and pinching. As soon as mature plants start to bud, keep only one strong bud on each node of the strong branches, picking off any buds. Remove overgrown or stunted branches, axillary shoots, and tendrils as soon as possible to facilitate ventilation and transmission of light. New frost grape shoots must be pinched so that only 4-8 leaves remain above the spike.
Flower thinning. The number of flower spikes is usually determined according to the species and the weight of the spike. For small-spike species of frost grape, 2 spikes can be left on each fruiting branch. For medium-spike species, 1 spike can be left on each fruiting branch. For large-spike species, no spikes should be left on the new vine near the main vine.
Flower-spike thinning should be carried out before flowers start to bloom to avoid excess nutrient consumption. Remaining spikes need to be pinched off by 1/4 of the length of the spike tip. The secondary and tertiary spikes that grow later can be thinned in time.
Winter pruning. For newly planted seedlings in their first two years, all axillary shoots should be cut off to keep the trunk strong. Only the trunk and leaves directly attached to the trunk should be left. Once the trunk grows 91 cm tall, the top tip should be pulled horizontally and tied to an iron wire at a higher level. After the first two years, select the robust fruiting branches close to the trunk for cutting back. Each pruned spur should have 2 or 3 buds. After new shoots sprout in the spring of the following year, the shoots at the upper part of the plant are the ones that will bear fruit. Then the rest of the branches can be cut off.
When you winter prune the following year, a strong branch near the base of the trunk should be selected for short-tip pruning as a new fruiting branch, ensuring that 2 or 3 buds are once again retained. Repeat in this way, and robust fruiting branches can be kept while the year-by-year outward movement of fruiting parts can be prevented. When a wound caused by winter pruning is larger than 1 cm, a protective agent should be applied to prevent bacteria infection. Any cut branches and tendrils should be burned in bulk.
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