To prevent tomato plants from getting leggy, ensure they get 14–16 hours of bright light daily, keep temperatures between 65∘F 65∘F and 70∘F 70∘F, and promote sturdy stems by brushing the tops daily or placing a small fan nearby to simulate wind.
To fix a leggy tomato plant, bury the long, spindly stem deep in the soil. Tomatoes can grow roots all along their stems. By burying the stem deeply, you transform it into a massive root system, resulting in a much stronger, thicker, and healthier plant.
Tomato plants become tall and leggy because they are stretching for light, experiencing excessive heat, or being given too much nitrogen fertilizer. This causes weak, elongated stems as the plant prioritizes vertical growth over building a strong, sturdy structure.
To keep your tomato plants from getting too tall, "top" the plant by cutting off the main growing tip 3-4 weeks before your first expected fall frost. Additionally, pinch off young "suckers" (the shoots that grow in the V-shaped joints of the stem) to stop it from putting energy into new vertical vines.
Yes, you can cut the tops off leggy tomato plants, but the better method is to bury the long stem. Tomatoes can grow roots anywhere along their stems, so laying the plant sideways or in a deep trench when transplanting creates a stronger root system.
Especially for a leggy tomato transplant, it's a good practice to bury a significant portion of the transplants stem under the soil. Deeper planting will allow the tomato transplant to grow stocky as it receives direct sunlight after being placed outdoors in the garden.
For many, it's best to avoid pruning in the fall because it can stimulate new growth that will be damaged by cold. On the other hand, there are a few plants to prune in October, especially if you want to keep your garden looking gorgeous right through to spring.
Yes, it is perfectly okay to cut the top off ("topping") tomato plants, but timing is everything.
Sprinkling baking soda around tomato plants is a common, often debated, gardening hack used to increase the sweetness of the fruit and reduce fungal disease. It works by slightly lowering soil acidity (raising pH) and, when used in sprays, creating an alkaline surface that hinders fungi like powdery mildew.
Encouraging the last few to ripen
The simplest is to bring them into a warm room and place them in a paper bag with a ripe banana or apple. Both release ethylene gas, which encourages ripening. Keep the bag loosely closed, check daily, and you'll often find the tomatoes take on full colour within a week.
Leggy seedlings are less likely to grow into strong, producing plants. They are more apt to flop over when the leaves get big, or break when transplanting in the ground. They are delicate and tend to die before they get very big.
Never plant fennel, brassicas (like cabbage, broccoli, and kale), potatoes, or corn near tomatoes. These plants can stunt tomato growth, compete aggressively for nutrients, or spread devastating diseases and pests.
Perennials (Peonies, Daylilies, and Iris): Cut back perennials that have finished blooming to tidy up the garden and reduce pest issues. For plants like peonies, remove foliage to prevent overwintering fungal spores. While some plants benefit from fall pruning, others are best left untouched until spring.
You can plant a leggy tomato as deep as you want, removing the lower leaves and burying the stem up to the first set of top leaves. Tomato stems naturally grow "adventitious" roots from their nodes, turning a stretched stem into a much stronger, robust root system.
As the growing season draws to a close, tomato plants are often still loaded with fruit. To speed ripening late in the season, remove the growing tip of each main stem about four weeks before the first expected fall frost.
Coffee grounds provide tomato plants with slow-release nitrogen for leafy growth, trace minerals like potassium and magnesium, and beneficial organic matter. They also help improve soil drainage and can slightly deter pests like slugs and snails.
Hydrogen peroxide can be highly beneficial for tomato plants if used correctly. It is a cheap, effective, and readily available remedy used to control fungal diseases, manage pests, and aerate waterlogged soil. However, because it is a strong oxidizer, using too much can damage your plants.
The best homemade tomato fertilizer is a nutrient-rich, liquid compost tea. It delivers a gentle, balanced boost of essential macronutrients (nitrogen, phosphorus, and potassium). To make it, steep a shovelful of aged manure or compost in a 5-gallon bucket of water for 24 hours, strain the liquid, and water your plants.
To grow bigger tomatoes, maximize the fruit's size by pruning excess branches, restricting the plant to just one or two main stems, and plucking off early blossoms. This diverts the plant's energy into sizing up the remaining tomatoes rather than spreading resources across too many fruits.
To stop tomato plants from growing too tall, use the "topping" method: cut off the main growing tip of the plant about 30 to 40 days before your region's first expected fall frost, or when it reaches the top of your trellis or cage. This redirects energy into ripening existing fruit.
If you've been watering too much you might notice these signs:
5 Tomato Pruning Mistakes You Might Be Making (& What to Do...