|i have 2large beds of pentas. this is the 1st season(last 10) where i am losing over a third of the plants. I feed the plants with miracle grow liguifeed. the leaves yellow and turn to brown and the flowers died.I tried Bayer roses and flowers insecticide/food (dry pellets vs spray). I did have some slugs which I treated with ortho snail and slug. Please help!!!
|Answer from NGA
August 6, 2009
|Pythium, Rhizoctonia, and Botrytis are the most common diseases encountered with Pentas and all have to do with warm humid weather and/or poor soil drainage. If you've been growing pentas in the same bed for 10 years, the soil may be harboring disease pathogens. I can only suggest you move your pentas to a new bed next season or you grow them in containers until you can have your soil tested and treated. Your local cooperative extension office can offer some help in both regards. Best wishes with your pentas!
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