Lithodora Care

Water thoroughly at least once a week to encourage new roots to grow down deeply. One inch of rain per week would suffice and is needed for most perennial plants. Add a light layer of mulch on top to reduce weed germination and hold in moisture and warmth. Organic aged bark or shredded leaves will contribute a natural aesthetic and improve the soil as it breaks down. Always keep the mulch off the stems of plants to prevent rot.

There are several things to consider when carefully pruning Lithodora. The plant may become straggly, and the stems or leaves may become damaged by cold winter temperatures. As you would do for any evergreen, wait until early spring to prune it. Remove any blackened leaves that could prevent new growth and possible disease.

As new growth appears, a light fertilizer may be helpful but it is not necessary. Avoid using granular fertilizers near the plant crown and foliage, as these may cause burn injury. Instead, use a low rate of slow-release fertilizer.

While Lithodora thrives in full sun, it can also grow in partial shade. Give the plant afternoon shade in hotter climates. Protect from direct, hot sunlight and extreme winds until plants become established.

Provide moderately rich, well-drained soil, preferably sand, as the plant will not tolerate heavy clay soil. Acidic soil is good, though Lithodora oleifolia "Olive-leaved gromwell" prefers a pH that is alkaline to neutral.

Lithodora tends to bloom less or stop blooming in the hot and humid summers of the Deep South of the United States. Cut plants back to refresh them. Reapply mulch in autumn if planting in a cooler region such as USDA Zone 5 or 6.

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