Convolvulaceae
Tall Morning-glory
Ipomoea purpurea
Twining stems and wide-open blooms for the most patient of beginners
Alvesgaspar via Wikimedia Commons (cc by_sa_3)
About this plant
Ipomoea purpurea, a member of the Convolvulaceae family and the sprawling Ipomoea genus, is a perennial that earns its beginner-friendly reputation honestly. It asks for very little, roughly ten minutes of attention per week, and in return it climbs, twines, and covers whatever support you give it with the kind of effortless energy that makes new gardeners feel like they know exactly what they are doing.
What makes this plant particularly forgiving is its extraordinary hardiness range. Rated for USDA Zones 1a through 13b, it is one of the few perennials that can be grown outdoors across virtually every climate zone in the United States. Whether you are gardening in a frost-prone northern state or a warm southern garden, Ipomoea purpurea is built to adapt. Medium water needs mean you are not chasing a fussy watering schedule: consistent, moderate moisture is all it asks for, and it will reward that modest effort with vigorous growth season after season.
Gallery
Bloom
Rjcastillo via Wikimedia Commons (cc by_sa_3)
Gallery
George Chernilevsky via Wikimedia Commons (public domain)
Gallery
Bff via Wikimedia Commons (cc by_sa_4)
Step by step
How to grow it
Pick a spot
Find a spot with enough light for its needs. Plant it outdoors, ideally sheltered from the harshest afternoon wind.
Plant it
Any good all-purpose potting mix or well-drained garden soil will do. Give each plant enough room for its mature spread. Crowding causes more problems than undersizing the bed. Water it in gently once it's settled.
Water it
Water when the top inch of soil feels dry, roughly once a week in summer. Soak the soil, then let it breathe before the next round.
Feed & tend
This one is very forgiving. A balanced all-purpose fertiliser at the start of the growing season is plenty, and you can skip a month without harm. Plan on 10 minutes a week of hands-on care: watering, a quick trim, checking for pests.
Enjoy the bloom
Expect flowers in July to October. Deadhead spent blooms to encourage more, and take a minute to notice them. This is why you planted it.
Year at a glance
What to do, month by month.
Approximate for a temperate North American zone. Shift earlier the further south you garden, later the further north.
Jan
January: Rest
Dormant
Feb
February: Rest
Dormant
Mar
March: Wake up
New growth
Apr
April: Tend
Routine care
May
May: Tend
Routine care
Jun
June: Tend
Routine care
Jul
July: Bloom
Flowers expected
Aug
August: Bloom
Flowers expected
Sep
September: Bloom
Flowers expected
Oct
October: Bloom
Flowers expected
Nov
November: Wind down
Prep for dormancy
Dec
December: Rest
Dormant
Pet & people safety
This plant is toxic to pets or people.
The card below lists the species affected and the specific symptoms reported by the ASPCA or Pet Poison Helpline. Place it out of reach, and call the poison-control number if a pet or child has eaten any part of it.
Dogs
Toxic
Symptoms. GI upset, hallucinations, disorientation, ataxia after seed ingestion.
Seeds contain lysergic acid amide and related alkaloids.
Source: ASPCA
Record covers Tall Morning-glory toxicity for Dogs.
Cats
Toxic
Symptoms. Vomiting, disorientation, ataxia after seed ingestion.
Same seed-concentrated alkaloid mechanism.
Source: ASPCA
Record covers Tall Morning-glory toxicity for Cats.
Bloomwise is not a substitute for veterinary or medical advice. Every line above comes from a hand-verified reference.
Frequently asked
Common questions.
What USDA zones does Tall Morning-glory grow in?
Tall Morning-glory is hardy in USDA zones 2a to 11b. If your winter lows fall outside that range, grow it in a container you can bring indoors, or treat it as an annual.
How often should I water Tall Morning-glory?
Water about once a week in summer, adjusting for rainfall. Soak the soil, then let it breathe before watering again.
How much sunlight does Tall Morning-glory need?
Tall Morning-glory prefers four to six hours of sun, ideally morning light.
Is Tall Morning-glory safe for pets?
No. Tall Morning-glory is toxic to dogs and cats according to verified poison-control sources. Keep it out of reach. If your pet has eaten any part of it, call the ASPCA Animal Poison Control Center at (888) 426-4435.
Is Tall Morning-glory good for beginners?
Yes, this is a forgiving plant that tolerates inconsistent watering and the occasional missed feeding. A good choice for a first garden.
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Sources
Plant facts on this page come from a blend of public-domain and open-licensed datasets: Biodiversity Heritage Library (historical botanical illustrations, public domain), USDA PLANTS (taxonomy, public domain), GBIF (occurrence and taxonomy, CC-BY 4.0), OpenFarm (crop guides, CC-BY-SA 3.0), and Open-Meteo (climate and hardiness lookup, CC-BY 4.0). Toxicity records come from the ASPCA Animal Poison Control Center and the Pet Poison Helpline; every row is hand-verified against a primary reference.