mlrtime99 wrote:Does it get that bad? It won't go over the sides of the pot will it? No competition with vft?
There are many species of these "carpet mosses," but in general they form a very dense and crowding mat that sucks up all the water of the first couple inches of growing medium and strangle any seedlings both by crowding them from the sides and squeezing them, and by growing much faster and taller than the slow-growing Venus Flytrap or Darlintonia californica seedlings, for instance.
Carpet moss propagates very quickly. You will notice after a while, if you look closely while you are watering from above, that dozens or hundreds of tiny little green specks float on the water and are deposited all over the surface of the planting medium when you water. These all grow into new moss colonies.
Once it catches hold in a few pots, it seems to become an ineradicable problem in the greenhouse. I have even begun to sterilize growing medium in a pressure cooker to use as a top dressing (about an inch or 2.5 centimeters thick) when I transplant, to try to suppress the moss growth as much and as long as possible.
Yes, it's pretty. But it is a demon weed!