Overly vigorous tomatoes can be the result of too much water or fertilizer, so instead of using a high-nitrogen fertilizer, try something light, such as fish emulsion. Also try cutting back on watering once ripening starts, to encourage the vines to ripen the crop faster and to slow vine growth.Click to see full answer. People also ask, how tall should you let your tomato plants grow?A determinate tomato will need a stake 3 to 4 feet tall (early-season tomatoes that ripen in 70 days or less will not need staking or pruning), a indeterminate tomato will need a stake 5 to 6 feet tall.Furthermore, can I trim overgrown tomato plants? A prone, sprawling tomato vine is not a happy one as many leaves and fruit are shaded out and unable to contribute to the plant’s sugar production. Proper pruning and staking creates an upright plant able to produce more and earlier fruit. You can prune young plants just 18 inches tall or trim older, overgrown plants. Additionally, what happens if you cut the top off of a tomato plant? Called “topping,” this type of pruning causes the plant to stop flowering and setting new fruit, and instead directs all sugars to the remaining fruit. This way, the fruit will ripen faster, plus it becomes more likely that the green tomatoes you pick before frost will actually ripen when you bring them indoors.Should you cut the bottom leaves off tomato plants?If you take good care of your tomato plants, you’ll be rewarded with vigorous growth and lots of new leaves and branches, but tomato plants can grow too quickly for their own good. Trimming the lower leaves before planting and throughout the growing season will keep the plant strong and disease free.

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