Illustration
Trumpet Lily
Lilium
Trumpet Lily blooms from July through August.
Months here are Northern Hemisphere months; in the Southern Hemisphere, shift them by six months.
Growing Trumpet Lily
Plant it in full sun. It prefers moderate water. It is hardy in USDA zones 4–9. Expect it to reach about 4.5 ft tall and 1 ft wide at maturity, in roughly 2 years (not yet checked).
What this means
Written with AI assistance and not yet checked plant by plant against recorded sources, so treat every fact above as a starting point. Its scientific name was checked against botanical registries, an audit keeps its values consistent with the rest of the library, and a July 2026 review re-read the main facts of every plant then in the library against horticultural authorities without recording a source for each, which is why none of that counts as checked here. 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 Trumpet Lily
Trumpet Lily is a hardy bulb with two planting windows: fall is ideal, and early spring is a close second. In zone 6, the middle of its hardy zones 4 to 9, that means September or October, or March or April in spring. It blooms from July to August.
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 Trumpet Lily get?
4.5 fttall5 ft 7 inan adult1 ftwideSee Trumpet Lily in a garden plan: the planner shows it in 3D beside everything else you add, growing toward this size over the years.
Good to know about Trumpet Lily
Curated from university extensions, botanic gardens and other primary sources, with the source named on every note.
Safety
Every part is deadly to cats: eating a few bites, licking pollen from fur, or drinking vase water can cause fatal kidney failure. Harmless to dogs. per ASPCA and Frontiers in Veterinary Science
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Design a garden with this
Drop this plant onto a 3D plan, see how it fills in, and watch your whole garden bloom across the year.