Preventing Damping Off in Conifer Seedlings

Damping off—a fungal disease caused by excess humidity and poor air circulation—is killing your spruce, fir, and concolor seedlings.

Prevention & Correction

1. Top-dress soil with milled sphagnum moss (natural fungicide).
2. Remove humidity domes once most seeds germinate.
3. Provide gentle air movement (small fan).
4. Acclimate to light gradually: 10 days in shade before sun.
5. Water from below; keep medium moist, never soggy.
6. Check flats 2–3 times daily.

Apply these practices to your newly sown concolor and fir seeds for better survival.