Yellow Leaves - Knowledgebase Question

Doylestown, PA
Question by CABLEGIRL9
June 21, 2001
THIS YEAR I HAVE A CONTAINER GARDEN. WHAT CAUSES SOME TOMATO PLANTS TO HAVE YELLOW LEAVES ? 2 OUT OF THE 5 PLANT I AM GROWING.
AM I WATERING THEM TOO MUCH ? PLEASE RESPOND THANK YOU


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Answer from NGA
June 21, 2001

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Yellow leaves can be a sign of overwatering, especially since there has been quite a bit of rain and cloudy weather. If the soil is still moist, you would not need to water. Poke your finger in the soil to check before watering. For best results, the potting soil should be a good quality soilless mix that both holds air and moisture and yet also allows excess moisture to drain out freely. Yellowing can also be caused by over or underfertilizing, so make sure you are following the label instructions when you fertilize. Container plants do need regular feeding because the soil tends to leach out the nutrients with all the watering. Yellowing can also be a sign of pests or disease, so examine the plants carefully for any other signs of those.

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