Plants often develop yellowing leaves, and in most cases this can be easily fixed. When you notice yellowing, make some adjustments to help the plant recover. Here’s what to look for and how to fix this problem.
Too much water can harm tomatoes and cucumbers. However, it can be fixed
Photo Agnieszka Sadowska / Agencja Wyborcza.pl
Too much water usually causes tomato leaves to turn yellow, while too little water usually causes the leaves to dry out or become brittle. Tomato plants need at least 100 ml of water per week from rainfall or watering. Watering should be done slowly so that the plants develop deep roots. If the soil around the root system has become compacted, it should be aerated. Aeration can be easily done with a garden rake and adding mulch.
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Fertilizer burn can cause yellowing of leaves, stems and even fruit. Be careful
Applying too much fertilizer can cause fertilizer burn, leading to yellowing of the leaves. Fertilizer burns can be treated by rinsing the plant with water. This treatment is particularly effective for plants grown in containers. Water thoroughly until water drains from the drainage holes to flush away accumulated salts and excess fertilizer.
Powdery mildew is the main cause of yellow and diseased leaves on vegetables and flowers
cucumbers/vegetable growing/garden photo: private archive
Powdery mildew is a leaf disease that causes yellow spots on leaves throughout the plant at any time during development, but most often occurs during ripening. Fungicides containing sulfur or copper may be effective. Biological products are also effective. Look for biological products that contain sesame, rosemary or thyme oil or potassium bicarbonate as an active ingredient.
Source: Gazeta
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