Allium firmament is a compact, intensely blue ornamental onion ideal for structured borders, dry planting schemes, and pollinator-focused landscapes. Its spherical flowerheads and silvery stems add texture and clarity to trade plantings from May to early summer.
Allium firmament is a professional-grade ornamental onion prized for its deep, metallic blue-purple flowerheads held on silvery, upright stems. Flowering in late spring to early summer, its neat, globe-like umbels bring form and colour contrast to structured landscapes, mixed perennial borders, and drought-tolerant schemes.
At a compact height of 40–50 cm, Allium firmament is highly suitable for formal massing, modern planting designs, and matrix planting alongside grasses. Its architectural form stands up well in civic plantings, commercial grounds, and educational landscapes.
Thriving in well-drained soils and full sun, Allium firmament requires minimal maintenance once established and is especially useful in low-irrigation, climate-adaptive planting. It is also a strong draw for bees and hoverflies, contributing to pollinator-friendly strategies in public greenspaces.
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