Root rot of perennials
We had an extremely wet spring and summer and many of my perennials appeared to have died from root rot. Leaves turned black (some brown), wilting, and whole plant death. First the columbines, then bee balm, then garden sage and lavender. I removed the columbine, bee balm, and one of the sage, but the remaining ones are dying. What can I do? I took very special care when preparing planting beds to get good organic material and drainage, including adding perlite. The plants that were effected are in different beds. Some plants such as coreopsis and speedwell appear to be recovering from the wet conditions. Thank you.
Certified GKH Gardening Expert
I do have a remedy that I use personally. It is ok if you don't have, or can't get all ingredients, but the more you have the better it works. this is safe for all plants, and will not hurt you either. Just don't skimp on the soil amendment. The recipe is as follows:
First, you will want to prime the ground with dolomitic lime, then spread wettable sulfur to Kill off any infection in the soil. I Also like to spray the plant itself. Mix a few drops of one or more of these ingredients into warm water with a spoonful of coconut oil: Rosemary oil, lavender oil, neem oil, garlic oil, cinnamon extract/oil and for really bad cases, also add clove oil.