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Morning Glory Seeds, Giant Moonflower
Description
(Ipomoea nil). The plant’s long, vigorous vines grow to 20 feet, while the giant white flowers themselves can measure over 7 inches across! Excellent for planting in night gardens.
- Annual
- 60-90 days to maturity
- 6-12 hours of full to partial sun
- Sprouts in 5-21 days
- Seed Depth: 1/4-1/2"
- Plant Spacing: 8-10"
- Ideal Temperature: 70-75 F
- Frost Hardy: No
Growing Tips, Tricks and FAQs
Growing Tips
The Giant Moonflower morning glory is a stunning heirloom variety that thrives in full sun and well-draining soil. It prefers a neutral to slightly acidic pH of 6.0-7.0. Giant Moonflower vines grow very tall, making them perfect for trellises, fences, or arbors. For larger blooms, avoid nitrogen-heavy fertilizers, which promote leafy growth, and instead use a balanced or phosphorus-rich fertilizer.
When to Grow
Sow seeds in the spring, after the danger of frost has passed and when the soil temperature is consistently above 55 F. In cooler regions, wait until your last frost date to direct sow seeds outdoors. For a head start, seeds can be started indoors 4-6 weeks before the last frost. The ideal germination temperature is 65-85 F. If you’re unsure of your last frost date, consult our blog post ‘Our Experts Answer Questions, Share Resources.’
How to Sow and Plant
Nick seed coat and soak seeds in warm water overnight to improve germination. Sow seeds directly in the ground, planting them 1/4-1/2 inch deep and spacing them 8-10 inches apart. Choose a sunny location that gets 6-8 hours of full sunlight daily. If starting seeds indoors, use biodegradable pots to minimize transplant shock, as Moonflowers dislike root disturbance. Keep the soil consistently moist during germination but avoid overwatering.
How to Grow
Water sparingly, allowing the topsoil to dry slightly between waterings, as the plant prefers not to sit in overly wet soil. Provide a strong climbing structure like a trellis or arbor early in the growing season to support the heavy vines. Blooms will appear mid to late summer and continue until frost. Each flower opens in the evening and has a sweet fragrance, making it a stunning addition to night gardens. Prune vines occasionally to control growth and encourage more flowers.
How to Save
- When the flowers fade, they leave behind large seed capsules containing large, black seeds.
- Allow the seeds to dry in a warm area out of direct sunlight for 7 days. Store them in a cool, dark, dry place over the winter.
- Remember to nick and soak your seeds the night before planting in the spring!
FAQ
Does Giant Moonflower morning glory need support?
Yes, Giant Moonflower vines require a sturdy support structure such as a trellis, fence, or arbor to climb as they grow.
Can Giant Moonflower morning glory grow indoors?
While it can be started indoors, the Giant Moonflower is not suitable for long-term indoor growth due to its size and need for full sun and climbing space.
Does Giant Moonflower morning glory attract pollinators?
Yes, the fragrant blooms attract moths and other nighttime pollinators.
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