Lobelia Plants
Q.

Cardinal flower possible disease

Anonymous added on July 24, 2015 | Answered

My cardinal flowers turn brown at the base of the plant, and then it moves upward and eventually kills the plant. Can you tell me what causes this and how I can stop it?

A.
A.Answers to this queston: Add Answer
Downtoearthdigs
Certified GKH Gardening Expert
Answered on July 26, 2015

This could be a watering issues or fungus. If the soil is moist, allow it to dry some between waterings, but make sure that it doesn't become too dry, which can lead to browning. Generally, if it is too wet or receiving too much water, you will see yellowing in the leaves while browning is normally the opposite. This would mean that something could be restricting the roots from taking up any water or nutrients. Check near the roots to see if they or any stems are becoming mushy. Also try treating the plant with neem oil and see if this helps.

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