Allium lusitanicum aka German Garlic

Allium lusitanicum is a bulbous perennial in the amaryllis family. Its native range lies in Europe, outside Britain and Ireland. Common names include Portuguese allium, German garlic, and mountain garlic. Gardeners grow it for summer flowers and culinary use. It forms a clump rather than a woody frame.

The slender, strap-shaped leaves have a mid-green tone. They smell of onion, and the plant loses them seasonally. Plants stand about 1 foot [0.3 metres] tall. The RHS gives an upper height of 1.6 feet [0.5 metres]. Its listed spread reaches 0.3 feet [0.1 metres]. Plants take two to five years to reach full size. Rounded flower heads appear in mid to late summer. Missouri Botanical Garden lists the bloom season as July to August. Flower shades range from pale pink to pinkish purple. The flowers attract butterflies and add colour to summer beds.

Choose full sun for growing this plant in the garden. Both sources also list partial shade as suitable. Use fertile soil that lets excess water drain away. The RHS lists chalk, clay, loam, and sand as options. It also accepts acid, neutral, and alkaline soil. Drainage matters more than this broad choice might suggest. Use containers where heavy clay stays wet through winter. The plant tolerates drought and dry soil once growing. RHS rates its hardiness H6; Missouri Botanical Garden lists USDA zones 5–9.

Plant it in groups within borders or cottage gardens. It also suits herb gardens, rock gardens, and gravel beds. Containers offer another way to grow its compact clumps. The RHS also suggests coastal sites and wildlife gardens. Deer and rabbits tend to leave it alone. Care needs are low, with little pruning beyond removing old growth. Remove spent flower heads to limit its free self-seeding. Sow ripe seed, or sow stored seed in spring. You can also lift bulbs after flowering and detach offsets.

Missouri Botanical Garden reports no serious pest or disease problems. Still, wet soil can cause bulb rot. Other possible problems include mildew, rust, and leaf spots. The RHS lists onion white rot and onion downy mildew. Watch for allium leaf miner and onion fly as well. The supplied evidence supports culinary use but names no edible parts. It does not establish safety for people or pets.