There are several common methods for ripening blackberries:

1. Place them together with fruits containing ethylene, such as apples, bananas, etc., because ethylene It has the effect of accelerating ripening, and it will usually be cooked in 2-3 days when put together.

2. Place it together with the vinyl agent. There is a special vinyl agent available on the market, also called a ripening agent. Generally, the black cloth and vinyl agent are sealed and placed in a fresh-keeping bag for 1-2 days. It's done.

3. Temperature ripening. After sealing and packaging the black cloth, place it in a heated, ventilated and dry place at home. It will usually be ripe in 2-3 days.

Note: Do not leave it for too long to avoid deterioration.