Troubleshooting
Spike heath problems — and how to fix them
Spike heath (Bruckenthalia spiculifolia) is generally forgiving once you match its basics, but a few issues come up again and again. Here is what each one looks like, why it happens, and the fix.
Root rot from poor drainage
The most common cause of plant loss. Waterlogged or clay soils in winter kill roots rapidly. Always plant on a slope, in a raised bed, or in gritty, free-draining mix. Improve existing beds with coarse grit or pea gravel before planting.
Leggy, open growth with poor flowering
Caused by insufficient sunlight or over-rich soil. Move plants to a sunnier location and reduce or eliminate fertiliser. Light shearing immediately after flowering prevents woody, open stems and encourages dense new growth that flowers the following year.
Powdery mildew in humid conditions
White powdery coating on stems and foliage can develop in warm, humid, poorly ventilated sites. Improve air circulation by thinning nearby plants. Apply a sulfur-based fungicide at first signs. Choosing a breezy, open position at planting largely prevents this problem.
Prevent spike heath problems before they start
Most spike heath issues are care-mismatch, not bad luck. Dial in the basics:
Spike heath problems — FAQ
Why is my spike heath root rot from poor drainage?
The most common cause of plant loss. Waterlogged or clay soils in winter kill roots rapidly. Always plant on a slope, in a raised bed, or in gritty, free-draining mix. Improve existing beds with coarse grit or pea gravel before planting.
Why is my spike heath leggy, open growth with poor flowering?
Caused by insufficient sunlight or over-rich soil. Move plants to a sunnier location and reduce or eliminate fertiliser. Light shearing immediately after flowering prevents woody, open stems and encourages dense new growth that flowers the following year.
Why is my spike heath powdery mildew in humid conditions?
White powdery coating on stems and foliage can develop in warm, humid, poorly ventilated sites. Improve air circulation by thinning nearby plants. Apply a sulfur-based fungicide at first signs. Choosing a breezy, open position at planting largely prevents this problem.