When do grapes usually ripen?

When do grapes usually ripen? If grapes are cultivated out of season, they can be cultivated all year round. Next, the ripening time of grapes in open cultivation conditions is introduced, as well as the picking time, methods and matters needing attention.

1. When do grapes usually ripen?

Grapes usually ripen in late summer and early autumn. The grape harvest period is from the end of August to the beginning of September, but the ripening time is different due to different grape varieties, and the specific picking time needs to be determined according to the grape varieties.

Generally, grapes are not mature enough, and the taste is not good if they are harvested too early. However, if they need to be stored or transported for a long time, they can be harvested half a month before maturity, and physiological after-ripening can be used to prevent grapes from spoilage.

If you don't need to transport or store, you can pick the grapes when they are just ripe, which can not only ensure the taste, but also reduce the acidity.

Second, the time requirements for grape picking

You can choose to do it in the weather where the sun is not strong. When the dew is dry, you can harvest it until 12.

It can also be picked after 3 pm to evening, so as to avoid strong sunlight and water loss. Picking at night, because the temperature is low, can avoid oxidation consumption, can better keep fresh.

Third, the specific methods of grape picking

When picking grapes, you can hold the whole ear with one hand, and leave the other hand on the branch with 1cm scissors to cut it off. If there are bags after cutting, be sure to remove the bags, carefully check the grapes for diseased fruits and diseased spikelets, and if there are, cut them all off.

The picked grapes should be put into the picking rack. Generally, one rack can hold 2/3 grapes. Try to stagger them as much as possible, and don't squeeze them in alignment. The bottom of the frame should be covered with clean newspapers or clean straw and cartons.

Four, grape picking matters needing attention

1. Before harvesting, it is most suitable to pick grapes under slight water shortage, so that the grapes taste sweeter and have better quality. In case of rain, drainage must be carried out in time, and rainproof measures should be taken to avoid fruit falling.

2. Grape fruit must be harvested at physiological maturity. Grapes commonly used for storage, such as red grapes, can be harvested when the sugar content reaches 16- 19 and the sugar content of fresh grapes is 20-25.