Thick Yellow Spongy-looking Fungus On Clematis Vines - Knowledgebase Question

Ocean Pines, MD
Avatar for DocRWink
Question by DocRWink
June 13, 2001
During a spell of humid weather a thick spongy yellow fungus? has developed on the lowest 4 inches of 3 clematis vines. What do I do with it? Will it kill the vines? What is it? Many thanks for your help.

Answer from NGA
June 13, 2001
Based on your description I am not certain what that could be. One possibility however is that a slime mold of some kind has developed, either on the mulch or in some of the organic material in the potting mix they came in or on material used as a soil amendment. You might try gently cleaning it (the spongy material) and the existing mulch away from the area, replace the mulch, and see what happens. Slime molds will actually disappear on their own eventually, but can be rather unsightly. I would also rather see the stem area kept clear for air circulation. I'm sorry I can't be more helpful.

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