Garden Problems & Solutions

Yellow tomato leaves are most commonly caused by nitrogen deficiency, overwatering, or early blight disease. Check the pattern of yellowing: bottom leaves first usually indicates nitrogen deficiency or natural aging, while random yellow spots suggest disease. Water only when the top inch of soil is dry, and feed with a balanced fertilizer every 2-3 weeks.

Blossom end rot is caused by inconsistent watering that prevents calcium from reaching developing fruit, not by lack of calcium in soil. The solution is maintaining even soil moisture through consistent watering and mulching. Affected fruits cannot be saved but the plant will produce healthy fruit once watering is corrected.

The fastest way to control tomato hornworms is to hand-pick them off plants in the morning when they are sluggish. For larger infestations, spray with Bt (Bacillus thuringiensis), an organic caterpillar-specific bacteria. Encourage parasitic wasps by planting dill and parsley - if you see white cocoons on a hornworm, leave it alone as beneficial wasps will emerge.

The most effective natural aphid control is a strong spray of water to knock them off plants, followed by releasing or attracting ladybugs and lacewings. For severe infestations, spray with insecticidal soap or neem oil. Aphids reproduce rapidly so treat at first sign and repeat every 5-7 days until controlled.

Treat powdery mildew immediately with a baking soda spray (1 tablespoon baking soda + 1 tablespoon vegetable oil + 1 teaspoon dish soap per gallon of water) or milk spray (40% milk to 60% water). Remove severely infected leaves, improve air circulation, and water at soil level. Prevention through proper spacing and resistant varieties is more effective than treatment.

Leggy seedlings are caused by insufficient light - seedlings stretch toward the nearest light source. The fix is providing 12-16 hours of bright light daily, keeping grow lights 2-4 inches above seedlings, and ensuring even lighting from above. Mildly leggy seedlings can be rescued by burying stems deeper when transplanting (works for tomatoes especially).