How to Grow Heavenly Blue Morning Glory Seeds:
Heavenly Blue Morning Glory (Ipomoea tricolor) is a vigorous climbing annual with big sky-blue trumpet flowers. For faster, more even germination, lightly scarify the hard seed coat (nick with a nail file or rub with sandpaper) and soak seeds in warm water for 8–24 hours before sowing. Direct sow outdoors after the last frost when soil is warm, or start indoors 4–6 weeks early in deep pots to protect the taproot. Plant seeds about 0.5–1 cm (¼–½ in) deep, 15–30 cm (6–12 in) apart, and keep soil evenly moist until sprouting; germination usually happens in 7–14 days in warm conditions. Choose a full-sun spot with well-drained soil and install support at planting time—trellis, netting, fence, or strings—because vines climb fast and don’t like being moved once established.
How to Care for Heavenly Blue Morning Glory:
Water regularly during early growth, then water deeply when the top few centimeters of soil dry out; steady moisture gives better flowering, but soggy soil causes weak growth and fewer blooms. Feed lightly—too much nitrogen makes lots of leaves and fewer flowers—so use a balanced or bloom-leaning fertilizer every 3–4 weeks in pots, or just a little compost in garden beds. Train vines onto supports as they grow and pinch tips early if you want a bushier plant with more side shoots. Deadheading isn’t required, but removing spent blooms and seed pods can extend flowering; if you want reseeding, let some pods dry on the vine. Watch for common pests like aphids or spider mites in hot, dry weather and treat early with water spray or insecticidal soap. Note: seeds are toxic if eaten, so keep them away from kids and pets.
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