What are the visual signs of an unhealthy tomato plant?
Written by
Liu Xiaohui
Reviewed by
Prof. Martin Thorne, Ph.D.Tomato plants have clear signs of distress: yellowing leaves starting with the bottom leaves, dull brown leathery patches on the bottoms of the fruits, unexpected wilting of stems, and cracked fruits with radial splits. These signs are indicators of problems that need to be solved.
Foliage Changes
- Yellow lower leaves mean nitrogen deficiency
- Purple undersides signal phosphorus shortage
- Curled leaves indicate heat or water stress
Fruit Problems
- Dark bottom spots show blossom end rot
- Cracks follow irregular watering
- White patches mean sunscald damage
Proper watering mitigates many problems. Deep soak plants every 2-3 days. Do not mist daily. To determine when to water, monitor the soil moisture level in the root zone. Mulch to hold that moisture evenly. This will help prevent fruit cracks and blossom end rot quite well.
Check your soil each spring, because most of the time, the real cause of leaf problems is a lack of nutrients. Generally, a balanced fertilizer will correct yellowing leaves. Bone meal is an excellent remedy for phosphorus deficiencies, and Epsom salts assist with magnesium deficiency. If necessary, adjust the pH level of your soil to approximately 6.5 for optimal nutrient absorption.
Environmental stress can exacerbate symptoms. Use shade cloth above 90°F. Space plants 24 to 36 inches apart. This increases airflow. Plant near windbreaks for cold protection. Healthy plants naturally resist pest and disease pressure.
Most problems resolve within weeks. Wilting plants recover with drainage fixes. Pest damage heals after treatment. Nutrient issues are clear with amendments. Your care transforms struggling plants into productive vines.
Read the full article: 8 Common Problems With Tomato Plants and Solutions
