Troubleshooting
Purple Mountain Heath problems — and how to fix them
Purple Mountain Heath (Phyllodoce caerulea) 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.
Heat stress and summer dieback
This circumpolar alpine species is acutely sensitive to warm, dry summers; shoots wilt, brown, and die back if soil dries out or air temperatures exceed 20°C for prolonged periods. Provide shade, deep mulch, and regular irrigation in warmer gardens — or grow only in northern Scotland or at altitude.
Root rot in poorly drained soil
Waterlogged conditions rapidly cause root death; ensure the planting site has excellent drainage by incorporating coarse grit, and never use heavy clay soil. Raise the planting height slightly in raised rock beds to improve surface drainage.
Prevent purple mountain heath problems before they start
Most purple mountain heath issues are care-mismatch, not bad luck. Dial in the basics:
Purple Mountain Heath problems — FAQ
Why is my purple mountain heath heat stress and summer dieback?
This circumpolar alpine species is acutely sensitive to warm, dry summers; shoots wilt, brown, and die back if soil dries out or air temperatures exceed 20°C for prolonged periods. Provide shade, deep mulch, and regular irrigation in warmer gardens — or grow only in northern Scotland or at altitude.
Why is my purple mountain heath root rot in poorly drained soil?
Waterlogged conditions rapidly cause root death; ensure the planting site has excellent drainage by incorporating coarse grit, and never use heavy clay soil. Raise the planting height slightly in raised rock beds to improve surface drainage.