Morning Glory is an annual grown for its purple blooms, which open from spring through fall. Season length, not a winter zone, decides where it grows. Notably, it shrugs off deer and grows just as well in a container as in the ground. Its flowers are a moderate draw for honeybees, butterflies, and hummingbirds.
Morning Glory — the short answer
Morning Glory: grown in zones 2–11, full sun, pH 4.3–7.5, about 65 days to maturity.
- USDA zones
- Grown as an annual — see the growing season
- Growing season, not a hardiness zone
- Soil pH
- 4.3–7.5
- We haven't confirmed this against a published source yet.
- Sun
- Full Sun
- NC State Extension Gardener Plant Toolbox
- Days to Maturity
- 65 days
- We haven't confirmed this against a published source yet.
Plant data: Growable Ground Plant Database, compiled from FAO ECOCROP, USDA PLANTS and university Extension sources — each tile names its own row's source, because per-field provenance varies.
Score Morning Glory on your exact land.
Zone averages can't see the slope, soil, frost, and sun that decide whether morning glory actually takes — and those shift from one yard to the next. Enter your address and we'll score morning glory against your land's real conditions.
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What Morning Glory is
Morning Glory grows as an annual and reaches around ten feet at maturity. It blooms purple from spring through fall. It's also deer-resistant and well suited to containers.
Mature height, bloom period, flower colour, deer resistance and container suitability: We haven't confirmed this against a published source yet.
How to grow Morning Glory
Season length, not a winter zone, decides where morning glory grows. Morning Glory does best in full sun — at least 6 hours of direct sun a day — and soil from pH 4.3 to 7.5, on consistently moist ground. It needs around 1,000 growing degree days to mature and a growing season of at least 30 frost-free days, which is why climate matters as much as soil.
USDA Zones
Grown as an annual — see the growing season
Soil pH
4.3 - 7.5
We haven't confirmed this against a published source yet.
Sun
Full Sun
NC State Extension Gardener Plant Toolbox
Drainage
poorly (saturated >50% of year)
We haven't confirmed this against a published source yet.
Minimum Growing Temperature
50°F
Below this it stops growing rather than dies — a pace limit, not a survival limit.
We haven't confirmed this against a published source yet.
Days to Maturity
65 days
We haven't confirmed this against a published source yet.
GDD Required
1000+
Growing degree-days of accumulated warmth it needs to mature — humid summers reach this faster than cool coastal ones.
We haven't confirmed this against a published source yet.
Mature Height
10 ft
We haven't confirmed this against a published source yet.
Frost-Free Days
30+
The frost-free stretch it needs start to finish — short-season areas may need an indoor head start.
Growable Ground plant catalog
Start the season right
Plant morning glory in full sun with at least 6 hours of direct sun, once the soil has warmed and frost risk has passed.
Match the soil
Morning Glory prefers pH 4.3 to 7.5. We haven't confirmed this against a published source yet. A quick soil test from your local Extension lab tells you whether to add lime or sulfur to land in band.
Water steadily
Keep the root zone evenly moist through establishment. We haven't confirmed this against a published source yet. Match watering to the plant's drainage preference and your local rainfall.
Harvest at its peak
Cut morning glory blooms in the cool of the morning, just as they open, for the longest display.
Where Morning Glory thrives
Season length, not a winter zone, decides where morning glory grows. Zone is only the starting point, though: the soil pH, drainage, and frost dates on your specific land decide how well it actually does.
A USDA zone is a 10°F band of average annual extreme winter minimum, so zones 2–11 spans average winter lows from -50°F to 50°F (USDA PHZM 2023). Across the 50 states and DC, that band covers 48 outright and splits 3 more down the middle.
Zones 2–11·Hardiness bandOpen map →
Continental US shown — Alaska and US Pacific territories sit outside the federal map's polygon dataset.
This map is derived from the USDA ARS / PRISM Plant Hardiness Zone Map (2023) and is not the official USDA Plant Hardiness Zone Map.
Where Morning Glory stands, state by state
Morning Glory is rated for zones 2–11 — a cold floor USDA puts at -50 to -40°F. Across the 50 states and DC, 48 sit fully inside that band, the line runs through 3 more, and 0 sit outside it — and inside every split state, the same line runs on at county grain.
Fully inside zones 2–11
48 states
3 of 48 shown
State zone extents: USDA Plant Hardiness Zone Map (PHZM) 2023. A zone is a 10°F band of average annual extreme minimum temperature, so a state that splits the band contains the boundary — its own page draws the county line, and a parcel report resolves which side your land sits on.
What grows around Morning Glory
Growing guides for morning glory
Related plants in annual flower
Good to know
One caution for pet owners — morning glory is toxic to dogs and cats (moderate severity). Keep it out of reach, and call ASPCA Animal Poison Control at (888) 426-4435 in an emergency. (Source: NC State Extension Gardener Plant Toolbox.)
Morning Glory offers moderate value to bees and other pollinators. We haven't confirmed this against a published source yet.
Your land is one point inside Morning Glory's range
This page resolves to the species. Your state page draws the county line, and a report reads the parcel — the soil pH, drainage, sun, and frost dates on your exact ground, which no species average can see.
See if Morning Glory will thrive on your land
Zone averages are a start. Your soil pH, drainage, sun exposure, and frost dates shape whether morning glory actually takes. We score it against the mapped and modelled conditions at your address.
Three things about your exact spot that zone averages miss:
We read public map data for this spot — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources analyzed in seconds
How we know this about Morning Glory
The figures above are cited per row, not per site: the pH band names this plant’s own source column, the three temperature figures each carry their own, and days-to-maturity cites the publication that actually lists it. All of it comes from the Growable Ground Plant Database — a compilation over FAO ECOCROP, USDA PLANTS, and university Extension sources, published openly with per-field provenance.
Grounded inUSDA PLANTS Database
Frequently asked questions
Can I grow Morning Glory in my zone?
Morning Glory is grown as an annual, so a hardiness zone does not decide it — its growing season follows your last and first frost dates. Soil pH, drainage, and frost dates on your specific parcel also shape whether it takes.
When should you plant Morning Glory?
Most growers plant morning glory after the last spring frost, once the soil has warmed, leaving enough of the season for its 30-day frost-free need. Your local frost dates set the exact window — a Growable Ground report reads them for your address.
How much sun does Morning Glory need?
Morning Glory needs full sun — a spot that catches at least 6 hours of direct summer sun a day. In more shade it still grows, but usually gives a smaller, later crop. The catch is that a yard rarely gets even light everywhere — a fence, the house, or one tall tree can quietly take those hours. A Growable Ground report reads the real sun-hours across your land, canopy and buildings included, so you can pick the brightest bed before you plant.
What soil does Morning Glory need?
Morning Glory prefers soil pH 4.3 to 7.5, on consistently moist ground. We haven't confirmed this against a published source yet. Your report scores your parcel's mapped soil against that using USDA SSURGO data.
Does Morning Glory attract pollinators?
Yes — morning glory's flowers are a solid nectar source for honeybees, butterflies, and hummingbirds. We haven't confirmed this against a published source yet.
Is Morning Glory safe for pets?
Morning Glory is toxic to dogs and cats with moderate severity. Keep it out of reach, and call ASPCA Animal Poison Control at (888) 426-4435 in an emergency. (Source: NC State Extension Gardener Plant Toolbox.)
Keep exploring Morning Glory
Morning Glory state by state
Every state morning glory's zone reaches — 36 link straight to that state's morning glory growing page; the rest open the state's full growing guide.