Troubleshooting
Compact Alpine Fir problems — and how to fix them
Compact Alpine Fir (Abies lasiocarpa 'Compacta') is generally low-drama, but a few issues come up again and again. Here is what each one looks like, why it happens, and the fix.
Root rot in poorly drained soil
This high-altitude species is highly sensitive to waterlogged conditions; root rot causes rapid yellowing and death. Always plant in very free-draining soil or on a raised site.
Balsam woolly adelgid (Adelges piceae)
Abies lasiocarpa is susceptible to this tiny insect pest, which causes galled, swollen nodes and progressive shoot dieback. Inspect in spring; remove and destroy affected material and apply horticultural oil as a preventive.
Prevent compact alpine fir problems before they start
Most compact alpine fir issues are care-mismatch, not bad luck. Dial in the basics:
Compact Alpine Fir problems — FAQ
Why is my compact alpine fir root rot in poorly drained soil?
This high-altitude species is highly sensitive to waterlogged conditions; root rot causes rapid yellowing and death. Always plant in very free-draining soil or on a raised site.
Why is my compact alpine fir balsam woolly adelgid (adelges piceae)?
Abies lasiocarpa is susceptible to this tiny insect pest, which causes galled, swollen nodes and progressive shoot dieback. Inspect in spring; remove and destroy affected material and apply horticultural oil as a preventive.