yellow leaves - Knowledgebase Question

Port Orange, Fl
Question by dconway9
March 17, 2010
I have two diffenbacia ? plants that i've had for 10 years, i transplant them regularly every year and fertilize. This year the leaves are starting to turn yellow - what should i do.

Answer from NGA
March 17, 2010


Overwatering is the most common cause of yellowing leaves on a Dieffenbachia. Although you have 10 years experience growing them, it's possible you've used a different brand of potting soil - one that holds more or less water than you're used to. With large plants in large pots, allow the top quarter of the soil to dry out between waterings, or stick your finger down into the pot. If the soil is still moist one inch beneath the surface, you won't need to water for a few more days; if it feels dry, it's time to water. Plants use less water during the winter months when the light levels and temperatures are lower so be careful with watering during those months. If in doubt about when to water, it is best to err on the side of dryness. Hope this information is helpful.

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