Illustration
Blue Globe Onion
Allium caeruleum
Blue Globe Onion blooms from June through July.
Months here are Northern Hemisphere months; in the Southern Hemisphere, shift them by six months.
Growing Blue Globe Onion
Plant it in full sun. It prefers moderate water. It is hardy in USDA zones 3–9. Expect it to reach about 24 in tall and 8 in wide at maturity, in roughly 2 years (not yet checked).
No toxicity note is on file for Blue Globe Onion. That is not a clearance: check its safety for people and pets before planting.
What this means
Generated by an earlier AI feature of BloomsEye and not yet checked against outside sources, its scientific name included, so treat every fact above as a starting point. An audit keeps its values consistent with the rest of the library, which is not the same as being right. The source-by-source check is working through the whole library in the open, and a checked plant says so in this row.
When to plant Blue Globe Onion
Blue Globe Onion is a fall-planted bulb: get it in the ground 6 to 8 weeks before the ground freezes, typically September or October in zone 6, the middle of its hardy zones 3 to 9. It pays you back the following June to July.
Month-by-month timing for your zone is on the planting calendar; if you garden near zone 6, the middle of this plant's hardy range, start with zone 6 in September. Derived from the plant's category, zones and bloom months plus typical zone frost dates, not checked separately.
How big does Blue Globe Onion get?
24 intall5 ft 7 inan adult8 inwideSee Blue Globe Onion in a garden plan: the planner shows it in 3D beside everything else you add, growing toward this size over the years.
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Drop this plant onto a 3D plan, see how it fills in, and watch your whole garden bloom across the year.