Am I right to be worried about effects of cup fungus?
Jill Loach, Facebook
Stefan says: The cups are the fruiting bodies of cup fungus. Unlike the more familiar types of mushroom and toadstool that produce their spores on gills beneath the cap, the cup fungi produce them on the insides of the cup and shoot them upwards. But do they do any harm? To which the answer is no.
They aren’t in any way parasitic and won’t cause any harm to your sweet peas.
They’re simply the rather beautiful above-ground productions of the threads of mycelium that are present throughout the compost in your pots and help to break it down to liberate the nutrients that feed your plants.