Newly Registered
Posts: 1
Joined: Fri Apr 22, 2016 1:31 pm

Help!! Unknown granules in my new planter

When I went out to check on my planter this morning, I noticed this weird granular substance and I have NO idea what it is. It wasn't there when I checked on it yesterday. This planter is only about two weeks old, give or take a few days. I used a brand new bag of soil recommended by the guys at the store. Could it have been somehow contaminated? If so, why'd it take so long to show up??



Greener Thumb
Posts: 1030
Joined: Mon Oct 19, 2015 9:12 pm
Location: central Ohio

Are they hard or squishy?

User avatar
Posts: 30236
Joined: Thu May 01, 2008 7:21 pm
Location: Zone 6, NJ (3/M)4/E ~ 10/M(11/B)

Looks like slime mold to me. At least this one was a sedate brown and not bubble gum pink or neon yellow. ...well so maybe NOT slime mold but some kind of fungus in any case.

Nothing to worry about.

User avatar
Super Green Thumb
Posts: 25279
Joined: Sun Feb 15, 2009 6:04 pm
Location: TN/GA 7b

Yes. Your container is growing fungus because your potting mix looks very woody, almost more like mulch than soil. Lots of fungi love to grow on wood.

Greener Thumb
Posts: 801
Joined: Tue Sep 22, 2015 9:20 pm
Location: Canada zone 8b

It's a type of mushroom. Soon, you'll have the small granules growing into large mushrooms that can reach over 4 inches tall.

Since you have a lot of 'em, I'd recommend swapping the soil for some other type of soil. In my experience, these mushrooms like top soil as it is full of wood-like stuff.

Return to “Container Gardening Forum”