- Tue Feb 28, 2023 2:30 pm
I would only feed it if it looks pale and sickly. The problem I've seen with feeding sphagnum is that it promotes algal bloom and slime molds.
Instead, I'd focus on dialing in the cultural conditions first. It should grow just fine without fertilizer and feeding it is optional, honestly.
I also have some red sphagnum and was impressed with how much light it needs to show color. It's basically growing within 3-4" of some generic led shop lights and seems to like those conditions, as long as I can keep it from drying out.
If/when you decide to try fertilizing it, I would start with a very dilute solution and slowly dial it up. You want to find the sweet spot where the sphagnum is getting a boost but the algae and slime molds are not.
Hope that helps and good luck!
"All cultivars were typicals at some point."