The Q&A Archives: Yellow leaves?!?!

Question: Leaves on several species in my vegetable garden have started turning yellow. The worst case is my zucchini which looks healthy and robust otherwise. Some pepper, tomato and broccoli plants are showing some limited yellowing. Too much water (it's been wet here the last few weeks)? Too little (not likely)? Nutrient deficiency? Disease? Pests? How can I determine what's wrong?

Answer: Overly wet soils can cause leaves to yellow so that's certainly a possibility. And, vegetable plants often lose their lower leaves as they continue to grow healthy new leaves and develop fruits. As long as your plants are putting out healthy new growth, there's nothing to worry about. Broccoli grows best in cool weather. When it gets hot the plants want to die off. I hope that's not what's happening with yours! If you haven't fed your plants you can side dress with a 10-10-10 slow release granular fertilizer. Best wishes with your veggies!

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