Ipomoea hederifolia: complete guide

Overview

Ipomoea hederifolia, also known as ivy-leaf morning-glory, scarlet morning-glory, or red morning-glory, is a fast-growing tropical climbing plant from tropical America. This frost-sensitive climber is renowned for its scarlet red flowers that appear abundantly throughout summer and early autumn.

The plant distinguishes itself through its ivy-like, three-lobed leaves and striking red flowers. It is an energetic grower that spreads rapidly across structures. Ideal for gardeners seeking sudden, dramatic color in summer gardens.

Appearance and Bloom

The ivy-leaf morning-glory forms slender, twining stems that can grow up to 2-3 meters per season. The leaves are its namesake: three-lobed with central lobe larger than side lobes, very resembling ivy leaves (Hedera). Leaves are dark green, approximately 5-8 centimeters wide.

The flowers are the highlight: brilliant scarlet to deep red, funnel-shaped, about 2-3 centimeters in diameter. They open in the morning and close by late afternoon, with new blooms appearing daily during warm weather. Flower production is exceptional: plants can bear hundreds of blooms weekly.

The seed pods are small and round, ripening late autumn to early winter. Seeds are smooth, blackish-brown, remaining viable up to two years.

Ideal Location

Ivy-leaf morning-glory grows best in full sun (6-8 hours direct light). Partial shade (4 hours sun) tolerated, but flowering is significantly reduced. The plant is heat-loving and does not thrive below 15C night temperature.

Support structure is required: trellis, wire mesh, pergola, or sturdy shrubs. The plant becomes delicate yet trailing. Place in protected locations where morning and afternoon sun are optimal.

The plant is suitable for zones 9-11 outdoors; in zones 7-8 as an annual (in warm summers). In zones 5-6, can be grown in containers against south-facing wall during summer.

Soil

Ivy-leaf morning-glory thrives in moderately nutrient-rich soil: not as demanding as water-spinach, but not extremely poverty-tolerant like railroad creeper. A mix of 50% garden soil, 30% compost, 20% sand works ideally.

PH range: neutral to slightly acidic (pH 6.0-7.5) is best. Drainage is essential: poor drainage leads to root rot. For container cultivation: light potting mix with 40% agricultural soil, 40% compost, 20% sand.

Avoid heavy clay without amendment. Overfertilized soil can stimulate nitrogen-bloat at the expense of flowers.

Watering

Once good root system develops, the plant tolerates moderate drought. Water regularly during growing period (May-September) so soil remains moist but not waterlogged. During intense heat (25-30C), water 2-3 times weekly.

In containers (important for cooler zones), water daily during peak summer. Reduce in autumn to 3 times weekly, then to once weekly in October-November.

Overwinter in greenhouse on minimal water: every two weeks or even monthly suffices.

Pruning

Regular pruning promotes dense, bushy growth and richer flower production. Begin pruning once plant reaches 25 centimeters tall: pinch the growing tip. This causes side branching.

After blooming (October-November), apply heavy pruning: cut plant back to 1-1.5 meters, depending on available space. This stimulates vigorous growth and better blooming next season.

During peak summer, light monthly pruning suffices. Remove tangled runners and crossings. Always cut just above leaf nodes.

Maintenance Calendar

May: sow seed in warmth (20-24C) or take cuttings. Seed can soak 24 hours in water beforehand. June-September: feed once every 2-3 weeks with bloom fertilizer (10-52-10 NPK or similar). Water regularly. September-October: reduce feeding to once every 4 weeks. Heavy pruning after blooming. November-April: outside warm zones, plant dormant in greenhouse. Minimal water and no feeding.

Winter Hardiness

Ivy-leaf morning-glory is not winter-hardy in temperate Europe. Plant dies back at temperatures below 10C. In zones 9-10, plant can overwinter in protected locations against south-facing wall. In zones 7-8, reseed annually or apply heavy winter protection.

Most practical: container cultivation that moves to greenhouse or conservatory in September. On a warm windowsill, plant can survive winter (12-15C minimum).

Saving seed for next season is more economical than cuttings: store dry seed in cool, dark place.

Companion Plants

Ivy-leaf morning-glory pairs well with other garden plants.

• With white-flowering climbers: contrast is spectacular
• With yellow sunflowers below: color harmony
• With green-leafed plants: red flowers stand out

From nutrition perspective: association with nitrogen-fixing Medicago provides benefit.

Conclusion

Ipomoea hederifolia is for gardeners seeking dramatic red color from summer through October. The floral display is unique among Ipomoea species. Start from seed in May, plant out in June, and enjoy scarlet splendor until frost.

Seed available at Intratuin and Gamma. GardenWorld.app can create garden designs with red accent elements where this spectacular morning-glory fits perfectly. Combine with white and yellow flowers for maximum impact.

The plant itself is not edible, but its beauty makes that irrelevant.