Troubleshooting
Compact bog rosemary problems — and how to fix them
Compact bog rosemary (Andromeda polifolia 'Compacta') 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.
Loss of compact habit
Excessive nitrogen fertiliser or deep shade causes the plant to grow loosely and lose its tight mounded form. Withhold extra feeding, move to a sunnier position, and trim lightly after flowering to encourage bushiness.
Iron chlorosis
Yellow leaves with green veins indicate alkaline soil pH. Use only rainwater for irrigation (tap water is often alkaline), amend with sulphur, and repot into fresh ericaceous compost if the issue persists.
Winter browning of foliage
In exposed sites, cold desiccating winds can brown the narrow leaves even though the plant is fully hardy. Provide a windbreak or fleece protection in very exposed situations; the plant will usually recover once milder weather returns.
Prevent compact bog rosemary problems before they start
Most compact bog rosemary issues are care-mismatch, not bad luck. Dial in the basics:
Compact bog rosemary problems — FAQ
Why is my compact bog rosemary loss of compact habit?
Excessive nitrogen fertiliser or deep shade causes the plant to grow loosely and lose its tight mounded form. Withhold extra feeding, move to a sunnier position, and trim lightly after flowering to encourage bushiness.
Why is my compact bog rosemary iron chlorosis?
Yellow leaves with green veins indicate alkaline soil pH. Use only rainwater for irrigation (tap water is often alkaline), amend with sulphur, and repot into fresh ericaceous compost if the issue persists.
Why is my compact bog rosemary winter browning of foliage?
In exposed sites, cold desiccating winds can brown the narrow leaves even though the plant is fully hardy. Provide a windbreak or fleece protection in very exposed situations; the plant will usually recover once milder weather returns.