Q Is the white pow­der on my phlox leaves a prob­lem?

Garden Answers (UK) - - Gourmet Grower - EMMA WIL­LIAMS, ES­SEX

A This is pow­dery mildew, a com­mon fun­gal dis­ease on bor­der phlox that’s preva­lent when plants are stressed by drought. It’s too late to spray against the dis­ease but you could trim the fo­liage back if it’s very un­sightly. Mulch the plant next year to help keep soil moist and spray with fungi­cide be­fore the dis­ease ap­pears.

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