Lavandula multifida aka Fern Leaf Lavender

Lavandula multifida is known as fernleaf lavender or Egyptian lavender. It belongs to the mint family, Lamiaceae. Its native range spans southern Europe and parts of Africa. Records extend from Portugal and Italy to North Africa and Sudan. It grows in open, stony places, including disturbed ground near homes. In the wild, it can withstand grazing.

This small evergreen shrub grows fast and forms a bushy plant. Garden sources give heights and widths around 2–3.3 feet [0.61–1 metre]. Its upright stems become woody with age in frost-safe sites. Fine hairs cover the deeply cut, grey-green leaves. Each leaf can reach about 1.5 inches in length. The narrow leaf segments give the plant a fern-like look. Its strong leaf scent recalls oregano more than other lavenders.

Violet-blue flowers grow in dense spikes above the leaves. Each bloom reaches about half an inch in length. The spikes can reach about 2.5 inches long. Long flower stalks lift them clear of the foliage. Bloom runs from June to September in the Missouri Botanical Garden account. The RHS gives a season from early summer into autumn. The flowers draw butterflies and add colour beside the pale leaves. Removing spent flower spikes helps keep new blooms coming.

Give this plant full sun and soil that drains well. Neutral or alkaline soil suits it, including loam, sand and chalk. It tolerates drought and dry soil but cannot bear waterlogging. USDA hardiness zones are 8–10; the RHS rates it H3. A sheltered site and winter mulch help in Zone 8. Unprotected plants may die below 20°F. In frost-prone areas, grow it in pots under glass for winter. Trim in late summer, but do not cut into old wood. Avoid autumn pruning where winters are cold or wet.

Use it in borders, rock gardens, pots or along paths. Its flowers also suit fresh arrangements and drying. Deer and rabbits tend to leave it alone. Wet, cool soil can cause root and stem rot. Leaf spot, grey mould and rare honey fungus are other risks. Rosemary beetles and froghoppers may attack it. The RHS also flags a high risk from Xylella fastidiosa. Reports differ on food use: one lists leaf flavouring; another lists none. Plants For A Future reports no known hazards, not proven safety. It records traditional medicinal use of flowering branches for coughs.