Q.How To Prevent Rhubarb Red Spot Fungus From Overwintering.
I have been battling Red Spot Fungus on my rhubarb all summer, with a Fungicide. It is better, but not gone. I have NOT composted any of the leaves. Will it come back again next year. (This is the first time in 7 years). What can I do now to prevent it’s return in the Spring?

BushDoctor
Certified GKH Gardening Expert
Certified GKH Gardening Expert
Answered on October 7, 2020
It will, likely, carry over from season to season.
There are a few things that you can to do manage the illness, though. This article will help:
https://www.gardeningknowhow.com/edible/vegetables/rhubarb/brown-splotches-on-rhubarb.htm
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