Variety traits

Ornamental Allium Bulb

Allium L.

The size of an ornamental allium bulb, measured by circumference in centimeters, is a critical parameter that determines the plant's flowering potential and planting depth.

In the reference 6 varieties crop Ornamental Allium, where this is mentioned in the description.

The bulb size of ornamental alliums varies widely depending on the biological characteristics of the species: from compact forms such as Allium sphaerocephalon with a circumference of 5 cm, to giant cultivars like Allium Globemaster, which require a size of 20 cm or more. The circumference value correlates directly with the maturity of the bulb and its ability to produce a flower stalk, as young or undersized specimens often form only vegetative mass.

In agronomic practice, bulb size serves as the primary guide for determining planting depth, which should be two to three times the height of the planting material itself. Large bulbs are prone to an increased risk of rot if soil drainage conditions are compromised, which requires strict moisture control during storage and planting.

The propagation of ornamental alliums is based on separating offsets from the mother bulb, followed by a grow-out period of 2–3 years. Reaching a specific cultivar-standard circumference size is a necessary condition for ensuring the desired decorative effect and full flowering in garden cultivation.

General information about the subject — on the page Bulb.

Sources8

Varieties of Ornamental Allium mentioned in the description

Selection based on the description text, not on official evaluation: these data are absent from registers. For specific variety details, please refer to its profile.