Troubleshooting
Cross-leaved heath problems — and how to fix them
Cross-leaved heath (Erica tetralix) 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.
Drought stress and dieback
Unlike other heathers, cross-leaved heath has very low drought tolerance. Even brief drying out causes shoot tip browning and dieback. Mulch around the base with bark or moss and ensure consistently moist soil at all times.
Grey mould (Botrytis cinerea)
Dense, damp foliage in stagnant air creates conditions for Botrytis. Grey fuzzy mould appears on foliage and flowers. Improve air circulation where possible and remove affected tissue promptly. Avoid overhead watering.
Failure to establish in alkaline soils
Erica tetralix is particularly lime-intolerant. In neutral or alkaline soils, plants yellow and die within one season. Always test soil pH before planting; target 4.0–5.5 and amend with sulphur or ericaceous compost.
Prevent cross-leaved heath problems before they start
Most cross-leaved heath issues are care-mismatch, not bad luck. Dial in the basics:
Cross-leaved heath problems — FAQ
Why is my cross-leaved heath drought stress and dieback?
Unlike other heathers, cross-leaved heath has very low drought tolerance. Even brief drying out causes shoot tip browning and dieback. Mulch around the base with bark or moss and ensure consistently moist soil at all times.
Why is my cross-leaved heath grey mould (botrytis cinerea)?
Dense, damp foliage in stagnant air creates conditions for Botrytis. Grey fuzzy mould appears on foliage and flowers. Improve air circulation where possible and remove affected tissue promptly. Avoid overhead watering.
Why is my cross-leaved heath failure to establish in alkaline soils?
Erica tetralix is particularly lime-intolerant. In neutral or alkaline soils, plants yellow and die within one season. Always test soil pH before planting; target 4.0–5.5 and amend with sulphur or ericaceous compost.