Plan the perfect garden with our interactive tool →

Remedies for Leaf Curl in Tomato Plants

...
tomato plants image by JLycke from Fotolia.com

Tomatoes are generally easy to grow, and a healthy plant will provide you and your family with many sweet, juicy tomatoes from midsummer until the first fall frost. But tomatoes need good soil, plenty of sun and nutrients in order to thrive. They sometimes fall victim to insects, which can cause leaves to become curled. The plants' health and productivity can also suffer if they contract a disease that causes the leaves to curl.

Reduce Nitrogen

When tomato plants are small, they benefit from one to two applications of a high nitrogen plant food. As soon as your plant starts to form blossoms, stop giving it nitrogen because it causes the foliage to grow at the expense of the flowers, which will soon turn into fruit. Too much nitrogen will cause leaves and stems to become very dark green and thick. While this might look like a good sign, curled leaves are another effect of excessive amounts of nitrogen. Choose a plant food specially designed for tomatoes, or spread compost around their root zone instead of using fertilizer.

  • Tomatoes are generally easy to grow, and a healthy plant will provide you and your family with many sweet, juicy tomatoes from midsummer until the first fall frost.
  • As soon as your plant starts to form blossoms, stop giving it nitrogen because it causes the foliage to grow at the expense of the flowers, which will soon turn into fruit.

Limit Excessive Water

Tomato leaves can develop a curled appearance when the plant is in soil that stays wet longer than it should. Summer rains can cause leaf curl, according to Texas A&M University. If you rely on irrigation to keep your tomato plants healthy, always allow the soil to dry out between waterings. Plant your tomato in a basin, which you can flood to water your plant deeply once every week or 10 days if needed

Control Insects

The small sucking insect called a psyllid attacks tomato plants, but does not necessary present a problem every year, according to the University of Colorado. Because the psyllid sucks out the plant’s juices, it loses the ability to maintain turgidity in its leaves—they become yellow and curl under at the edges. When this occurs, your tomato plant can be stunted and may produce little or no fruit. Aphids are a common insect pest in vegetable gardens and also can cause tomato leaves to curl. If you think your plants may be infested with psyllids or aphids, spray with insecticidal soap. Follow label instructions and repeat every few days until you see signs of healthy new leaves emerging.

  • Tomato leaves can develop a curled appearance when the plant is in soil that stays wet longer than it should.
  • Plant your tomato in a basin, which you can flood to water your plant deeply once every week or 10 days if needed The small sucking insect called a psyllid attacks tomato plants, but does not necessary present a problem every year, according to the University of Colorado.

Treat Diseases

The tomato leaf curl virus (ToLCV) can attack tomato plants. The plant becomes stunted, and leaflets curl and grow increasingly smaller, exhibiting a puckered appearance. Whiteflies cause this disease and help it to spread from plant to plant. Hang yellow sticky traps among your tomato plants to keep whiteflies away and prevent the virus from being introduced. Also, choose a hybrid variety of tomato that is bred for its resistance to this virus.

Related Articles

Why Are My Tomato Plant Leaves Curling?
Why Are My Tomato Plant Leaves Curling?
How to Keep Bugs Off My Tomato Plants
How to Keep Bugs Off My Tomato Plants
How to Kill Bugs on Tomato Plants
How to Kill Bugs on Tomato Plants
Pest Control for Tomato Plants
Pest Control for Tomato Plants
How to Keep Bugs Away From Tomato Plants
How to Keep Bugs Away From Tomato Plants
How to Improve the Fruit Yield From a Tomato Plant
How to Improve the Fruit Yield From a Tomato Plant
How to Grow Creole Tomatoes
How to Grow Creole Tomatoes
Tomato Pest Identification
Tomato Pest Identification
How to Kill Aphids on Tomato Plants
How to Kill Aphids on Tomato Plants
Worms in Papaya Fruit
Worms in Papaya Fruit
How to Feed Calcium to a Tomato Plant
How to Feed Calcium to a Tomato Plant
What Are the Causes of Tomato Dry Rot?
What Are the Causes of Tomato Dry Rot?
How to Store Fresh Tomatoes From Your Garden
How to Store Fresh Tomatoes From Your Garden
Caterpillars That Eat Tomato Plants
Caterpillars That Eat Tomato Plants
Tomato Plants & Sulphur
Tomato Plants & Sulphur
Garden Guides
×