I've got 3 Anethesia autoflowers going outdoors right now. All in the flowering stage. They appear to be pretty healthy overall, but my soil just looks nasty. Lots of greenish color on the top, and just overall nasty. The plants are pretty small, but what is the best solution to fix this? any advice? No pics...Sorry
Can't help without pictures. You say healthy plant then your fine. Otherwise you might consider a transplant into fresh soil. http://forum.grasscity.com/index.php?/topic/1313961-First-Grow-In-A-While
I'm guessing the green stuff is algae on the surface. It won't hurt the plants. You can just break it up carefully with your hands and mix it in. Back off on the watering a bit. If the soil is constantly wet, the sun will promote algae growth.