Vegetables
Beginner
Article

How to Fix Curling Tomato Leaves

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Sep 5, 2026, 02:08 PM
Tomatoes hanging on tomato plant
Photo: Unsplash - Dan Gold

About This Resource

Tomato leaf curl is a common issue that can arise from various environmental factors, but it is usually not serious. The article explains that leaf curl can be caused by transplant shock, over-fertilization, heat stress, drought, root damage, excessive pruning, or intense sunlight. It provides actionable strategies to prevent and correct leaf curl, such as properly hardening off seedlings, maintaining soil moisture, avoiding high-nitrogen fertilizers, and providing shade during extreme heat. The article also discusses other potential causes of leaf curl, including ethylene gas injury and herbicide exposure, emphasizing the importance of understanding the sources of garden inputs. Overall, readers can learn how to identify and address the causes of tomato leaf curl to maintain healthy plants.

Key takeaways

What to know before you act on this, from the SteadScape editors.

  • Transplant tomato seedlings when soil temperatures reach at least 60°F, ideally in late spring after the last frost.
  • Maintain consistent soil moisture by watering every 3-5 days, especially during dry spells or heat waves.
  • Use mulch around plants to retain moisture; apply a 2-3 inch layer to reduce evaporation and regulate soil temperature.
  • Avoid high-nitrogen fertilizers; choose balanced fertilizers with an N-P-K ratio of 5-10-10 to prevent excessive leaf growth.
Best for
Beginner gardeners with tomato plants; apply strategies in late spring through summer.
Pairs with
Garden Planner for your zone and frost dates.

Source Information

Domain: gardenbetty.com

Summary and key takeaways written by SteadScape. How we choose resources

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