How to Grow Purple Skies
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Purple Skies
Ipomoea purpurea 'Purple Skies'
vinePurple Skies is a stunning morning glory cultivar featuring deep purple flowers with darker throats that bloom prolifically throughout the growing season. This fast-growing annual vine is ideal for trellises, fences, and arbors, creating dramatic vertical interest with its heart-shaped foliage. The flowers open in early morning and typically close by afternoon, providing a reliable display of color.
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Example Purple Skies timeline · Pittsburgh, PA (Zone 6b)
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Plant Purple Skies
Around Apr 17Near Pittsburgh's average last spring frost.
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Tend & protect
Late spring–summerWatering, feeding, and pest-watch reminders.
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Harvest Purple Skies
Around Jun 6≈ 50 days after planting
Sample dates for Pittsburgh, PA. Sign up to get exact Purple Skies dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 3-11 as a warm-season annual; perennial in zones 9-11
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Get my Purple Skies timeline →Growth Stages
Seedling
2-3 weeksSmall heart-shaped cotyledons emerge; true leaves appear within 1-2 weeks
Keep soil consistently moist but not waterlogged. Provide bright light if starting indoors. Harden off before transplanting outdoors.
Vegetative
3-4 weeksVines rapidly elongate and produce multiple stems with heart-shaped leaves; no flowers yet
Install support structure (trellis, fence, or stake) early to guide growth. Pinch back growing tips to encourage branching and bushier growth if desired. Water regularly.
Budding & Flowering
8-12 weeksFlower buds form at leaf axils; blooms open in early morning with deep purple color and darker centers
Maintain consistent watering to support heavy blooming. Reduce nitrogen fertilizer to avoid excessive foliage production. Deadheading spent flowers encourages more blooms.
Peak Bloom
6-10 weeksMaximum flower production; vines densely covered with purple flowers opening daily; foliage fully covering support structure
Continue regular watering and deadheading. Monitor for pests. Fertilize every 3-4 weeks with balanced or low-nitrogen formula to sustain blooms through season.
Seed Set & Decline
Until frostFlowers gradually decrease as vines mature; seed pods develop if flowers are not deadheaded; foliage begins to decline with cooler fall temperatures
Allow some flowers to mature into seed pods if you want to save seeds for next season. Frost will kill the plants; harvest seeds before first hard freeze in cold climates.
Common Pests
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Spray with strong water stream to dislodge; use insecticidal soap or neem oil; encourage beneficial insects like ladybugs
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Hand-pick early morning; use pheromone traps away from plants; apply neem oil or spinosad in severe cases
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Increase humidity and water spray; use miticide or insecticidal soap; remove heavily infested foliage
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Use yellow sticky traps; spray with insecticidal soap or horticultural oil; encourage parasitic wasps
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Remove affected leaves; use spinosad; maintain plant health through proper watering and fertilization
Uses
Edible Flowers
CulinaryPurple Skies morning glory flowers are edible with a slightly sweet flavor and can be used as an elegant garnish for salads, desserts, or drinks. They should be harvested fresh in the morning for best presentation and texture. [source]
Traditional Herbal Use
MedicinalIn traditional medicine systems, Ipomoea species have been used as mild laxatives and for digestive support. The seeds contain alkaloids with purgative properties, though modern use is limited due to potential side effects. [source]
Cut Flowers & Floral Arrangements
CraftThe vibrant purple flowers add stunning color to fresh morning arrangements and can be pressed for floral crafts. Cut in early morning when blooms first open for longest vase life (though they typically close by afternoon). [source]
Pollinator Support
WildlifePurple Skies attracts bees, butterflies, hummingbirds, and other pollinators throughout the growing season. The abundant daily blooms provide excellent nectar and pollen sources for beneficial garden insects. [source]
Ornamental Screening & Shade
HouseholdFast-growing vines quickly cover unsightly structures, fences, or create living screens. The dense foliage and continuous blooms provide both privacy and a stunning visual focal point throughout summer and fall. [source]
This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.
Harvest Tips
For seed collection, allow spent flowers to mature into papery seed pods on the vine. Harvest pods when brown and dry (typically late August-September in cool climates). Shake seeds into a container and store in a cool, dry place. Cut vines back to ground level at season's end or after first frost. Fresh flowers can be enjoyed in the morning and typically drop by afternoon.
Fun Facts
- 🌱 Morning glories open their flowers in the early morning (typically 4-6 AM) and close them by afternoon, a phenomenon called nyctinasty driven by turgor pressure changes in the flower petals.
- 🌱 A single Purple Skies vine can produce dozens of flowers daily during peak bloom season, with new buds continuously forming throughout the growing period.
- 🌱 Morning glory seeds contain ergot alkaloids similar to those found in certain fungi; historically, some cultures used them for their psychoactive properties, though this practice is not recommended due to safety concerns and variable alkaloid content.
Gardening Terms
New to gardening? Learn about terms used in this guide:
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