Penicillium
Penicillium spp.
Shows as blue-green velvety colonies with white margins, often indistinguishable from Trichoderma without microscopy. Common on under-sterilized grain.
Visual Identification
Blue-green velvety colonies with distinct white margins at the edges. Appears more velvety/powdery than Trichoderma.
Not Treatable
Discard affected material immediately.
Sign up free to see how to identify and treat Penicillium
A free First Flush account unlocks the full identification checklist, recommended response, and step-by-step treatment for all 10 contaminants — plus the ability to log a contamination on one of your own grows and track its outcome.