How do raw tomatoes ripen

Raw tomatoes can be ripened through natural ripening, ethylene ripening, high-temperature ripening, rice ripening, fruit mixing ripening, and other methods.

1. Natural ripening

Place immature tomatoes in a well ventilated and cool place, avoiding direct sunlight. Tomatoes themselves release trace amounts of ethylene gas to promote ripening, which usually takes 3-5 days for the skin to gradually turn red and soft. During this process, it is necessary to check daily and remove rotten fruits. Suitable for tomatoes with high hardness and already starting to turn color, this method is less effective for tomatoes that are completely green.

2. Ethylene ripening

uses the ethylene gas released by ripe bananas or apples to accelerate tomato ripening. Place the tomatoes and 1-2 ripe bananas in a sealed paper bag, leaving a slight gap at the opening to maintain breathability. Excessive ethylene concentration can cause tomato rot. It is necessary to open the bag and ventilate every 12 hours. This method can shorten the tomato ripening time to 1-2 days, suitable for situations where it is urgently needed for consumption.

3. High temperature ripening

Wrap the tomatoes in a clean cotton cloth and place them in an environment of 25-30 ℃, such as the top of a router or a window sill indirectly exposed to sunlight. Excessive temperature can cause tomato spoilage, it is recommended to check the condition every 6 hours. High temperature can activate enzyme activity in tomatoes, promoting the conversion of starch into sugar, which can reach edible maturity after 2-3 days.

4. Rice ripening

The tomato is buried in dry rice, and ethylene gas can be retained in the gaps between the rice grains while maintaining moderate humidity. Rice can also absorb excess moisture to prevent mold growth, and it should be flipped every 10 hours to ensure even contact. This method has both insulation and gas concentration regulation functions, making it particularly suitable for use in areas with high humidity.

5. Mixed ripening of fruits

Store tomatoes and fruits with high ethylene release, such as pears and kiwis, together in a fruit basket. The ethylene released by different fruits can produce a synergistic effect, and the ripening efficiency is higher than that of a single fruit. Be careful to avoid stacking and squeezing, maintain air circulation, and ripen about 20% faster than individually ripening. During the ripening process, undamaged tomatoes should be selected, and they should be consumed or refrigerated as soon as possible after ripening. Avoid using plastic bags to seal and prevent moisture accumulation and mold growth. It is not recommended to use chemical ripening agents. Different varieties of tomatoes have significant differences in ripening speed, with cherry tomatoes typically maturing faster than large fruit varieties. If local softening or discoloration abnormalities are found, they should be immediately discarded to prevent contamination of other fruits. It is recommended to store immature tomatoes in an environment of 12-15 ℃ for daily storage to delay ripening and better preserve flavor compounds.