Dahlias
Q.

what causes my dahlia flowers to turn brown

Zone Pa. | berlin added on May 31, 2014 | Answered

The leaves and stems are green, but the flowers are turning brown.

A.
A.Answers to this queston: Add Answer
theficuswrangler
Answered on May 31, 2014

Dahlia flowers don't last a very long time, so old age is a good possibility, at least with the foliage looking good. You can look for thrips inside the flower buds. They're little insects that remind me of fleas, and some of them love to eat flowers. This article has more info; https://www.gardeningknowhow.com/plant-problems/pests/insects/controlling-thrips.htm

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