Morning Glory is an annual grown for its purple blooms, which open from spring through fall. It's hardy across USDA zones 2 through 11, 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.
Zones
2-11
pH Range
4.3-7.5
Sun
Full Sun
Days to Maturity
65
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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.
How to grow Morning Glory
Morning Glory grows in USDA zones 2 through 11. 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
2-11
USDA PHZM 2023
Soil pH
4.3 - 7.5
USDA PLANTS Database
Sun
Full Sun
Growable Ground plant catalog
Drainage
poorly (saturated >50% of year)
Growable Ground plant catalog
Frost Tolerance
50°F
The lowest temperature it shrugs off — below this, expect damage without cover.
Growable Ground plant catalog
Days to Maturity
65 days
Growable Ground plant catalog
GDD Required
1000+
Growing degree-days of accumulated warmth it needs to mature — humid summers reach this faster than cool coastal ones.
Growable Ground plant catalog
Mature Height
10 ft
Growable Ground plant catalog
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 (FAO ECOCROP). 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. 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.
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: ASPCA.)
Morning Glory offers moderate value to bees and other pollinators. (Source: Pollinator Partnership.)
Where Morning Glory thrives
On hardiness alone, morning glory grows across most of the country — its range (USDA zones 2 through 11) is unusually wide. Zone is only the starting point, though: the soil pH, drainage, and frost dates on your specific land decide how well it actually does.
Zones 2–11·Where Morning Glory growsOpen map →
Continental US shown — Alaska and US Pacific territories sit outside the federal map's polygon dataset.
On USDA hardiness-zone overlap, Morning Glory can grow in these states:
See if Morning Glory will thrive on your land
Zone averages are a start. Your exact soil pH, drainage, sun exposure, and frost dates shape whether morning glory actually takes — we score it against the real 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.
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Frequently Asked Questions
Can I grow Morning Glory in my zone?
Morning Glory grows in USDA hardiness zones 2 through 11 (USDA PHZM 2023). Zone is one factor — 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 (FAO ECOCROP). Your report scores your parcel's actual 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. (Source: Pollinator Partnership.)
Is Morning Glory safe for pets?
Morning Glory is toxic to pets (dogs,cats) with moderate severity. Keep it out of reach, and call ASPCA Animal Poison Control at (888) 426-4435 in an emergency. (Source: ASPCA.)