I don't know how big his collection may be. I don't know what conditions he/she grows their plants. I've seen mold spread fast. Both times they were ISI plants. This is common this time of year, damp, cool, no air, sets the conditions up for this problem. These plants are not expensive, and obtainable at Squw Mt. Nursery, and I made my suggestion on that basis. Nothing is written in stone. Thanks Karen, by the way I did look it up trying to figure out what it is. It is not listed in my Western Garden Book. Guess work would not work, you need to know the exact name of that problem, or you can't cure it. Molds can also make people sick, and if the spores spread into the walls, he could have big problems. Norma

leftwood, you have some very good questions that I should have answered in the first post. Better late than never...yes, it's only in the garden - one spot each of the 2 days it's appeared. This particular garden was built from scratch last year by my digging out clay and putting a mixture of compost and peat in, topped by cedar mulch. I haven't touched it with my hands but although it looks dry, when I stuck the end of a bic pen into it, it became a very thick liquid consistency. Don't know yet if it stains. It's kind of a random disbursement of this bright yellow stuff and to the eye it looks like what you'd get if you broke up a hard boiled egg's yolk and dropped it from your hand onto a surface. This stuff doesn't blow around. Today's mess is on the daffodil leaves which are now laying sideways on top of the mulch. I watered last night so the ground is still kind of moist. Sat, the day before pile 1 appeared we had a high of 95. Today it was about 90. Other days around these 2 haven't been nearly as hot. I'll try and get a picture of it posted by tomorrow. My gardening neighbor has never seen anything like this either. It's just weird. I've never seen any kind of mold like this, haven't seen any animal droppings or vomit like this, and it's definitely not something out of a human (at least no human that I know!). It's the bright yellow color and the mysterious appearance that has me baffled. If anyone has any ideas, I'm sure open to hearing them. Thanks, MN gardeners!

Oops, I see that I incorrectly posted the same picture twice. Here is the third photo I meant to attach. I looked at some photos of the different types of myxomycetes (Slime Mold),and couldn't find anything that looked exactly like what I have, but it still could be. Any suggestions on how best to deal with slime mold (myxomycetes). I don't really want it around my house, even if it is not really harmful. How much worse can it get? Thanks

I have a yellow slime mold that lives in my worm bin. I have the kind of worm bin with trays you swap out, empty, and place again at the top: the slime mold just moves upward through the trays and lives on. Had it for at least a year. Its name is Fred.