The most common cause for small tomatoes is stressed plants. The soil should be kept consistently moist or the plants may show signs of stress such as wilting, leaf drop or tomatoes that are too small. Many gardeners grow tomatoes in self-watering containers to ensure proper soil moisture for fruit development.Click to see full answer. Also to know is, how do you increase tomato fruit size?Maintaining a leaf area index of 3 will maximize fruit growth. Hand thinning of tomatoes on the end of a truss ensures more evenly sized, larger fruit. The use of growth regulators such as auxins at anthesis can stimulate fruit set, and increase fruit size especially under low light and low temperature conditions.Secondly, how do I keep my tomato plants small? To grow vining and semi-bush tomatoes as short, bushy plants, prune the central stems when the plants reach the desired height. Wipe your pruning shear blades with a cloth dipped in rubbing alcohol, and prune the stems above the second set of leaves that lie beneath stem tips. Regarding this, why are my vegetables so small? If the soil has been heavily fertilized with nitrogen and does not have comparable levels of phosphorous, the plants are likely to produce a great deal of leafy growth but very small fruit. Low levels or nitrogen can also result in small fruit; in this case, the plant will generally be spindly and yellow.Do tomatoes grow after turning red?Nope, tomatoes reach full size while they are stilll green, which is why people think it takes forever for them to ripen. Once they start to change color they are effectively cut off from the plant sap by scar tissue in the stem so the plant has nothing to do with their ripening.
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