How to Grow Maunaloa
Maunaloa
Ipomopsis aggregata
flowerMaunaloa is a stunning wildflower native to the western United States, prized for its tall spikes of brilliant red-orange tubular flowers that attract hummingbirds and other pollinators. This biennial or short-lived perennial produces dramatic vertical growth with delicate, feathery foliage and blooms prolifically during spring and summer months. It's an excellent choice for rock gardens, wildflower meadows, and naturalized landscapes.
When should you plant Maunaloa in your zone?
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Example Maunaloa timeline · Pittsburgh, PA (Zone 6b)
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Plant Maunaloa
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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First Maunaloa blooms
Around Sep 14≈ 150 days after planting
Sample dates for Pittsburgh, PA. Sign up to get exact Maunaloa dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 4-9, with best performance in zones 5-8
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Germination & Seedling
2-3 weeksTiny seedlings emerge with cotyledons and develop feathery true leaves. Plants are small and delicate.
Keep soil lightly moist but not wet. Provide bright light. Thin seedlings to proper spacing once true leaves appear.
Rosette Formation (First Year - Biennial)
3-4 months (summer through fall/winter)Plant develops a low-growing rosette of finely divided, feathery foliage near ground level. Minimal vertical growth in year one.
Minimal watering needed once established. Remove any weeds competing for space. Protect from excessive moisture in winter.
Bolting & Stem Elongation
3-4 weeksIn spring of second year, plant sends up tall, slender flowering stems (12-36 inches) with sparse leaves arranged along the stem.
Provide occasional deep watering as growth accelerates. Tall stems may need light staking in windy areas. Reduce fertilizer application.
Flowering
6-10 weeksSpikes bear numerous brilliant red-orange (sometimes pink or yellow) tubular flowers opening sequentially from bottom to top. Flowers are highly attractive to hummingbirds.
Deadhead spent flowers to encourage continued blooming. Provide support if stems lean. Maintain consistent but light watering.
Seed Set & Maturation
4-6 weeksFlowers fade and develop elongated seed capsules along the spike. Foliage may begin to decline as plant puts energy into seed production.
Allow some seed heads to mature if you want self-seeding. Reduce watering as plant prepares to decline.
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Increase humidity, spray with water, use insecticidal soap if severe
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Spray with neem oil or insecticidal soap; remove infested leaves
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Improve drainage, reduce watering, avoid overwatering, remove affected plants
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Ensure good air circulation, avoid wetting foliage, apply sulfur or fungicide if needed
Uses
Hummingbird nectar source
CulinaryThe tubular flowers are specially adapted for hummingbird pollination and provide an abundant natural nectar source, making this an excellent plant for attracting hummingbirds to gardens throughout the blooming season. [source]
Pollinator magnet
WildlifeBeyond hummingbirds, maunaloa attracts bees, butterflies, and other beneficial insects, supporting local pollinator populations and garden biodiversity. [source]
Wildflower meadow establishment
HouseholdMaunaloa self-seeds readily in appropriate conditions, making it ideal for creating sustainable wildflower meadows and naturalized landscapes with minimal ongoing maintenance. [source]
Cut flower arrangements
CraftThe tall spikes of vibrant tubular flowers are striking in fresh or dried flower arrangements, adding vertical interest and bold color to floral designs. [source]
Traditional indigenous use
MedicinalSome southwestern Native American tribes historically used related Ipomopsis species in traditional medicine, though maunaloa's medicinal applications are not well-documented in modern herbalism. [source]
This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.
Harvest Tips
Maunaloa is grown for ornamental flowers and self-seeding rather than harvest. Cut flowers for arrangements when several flowers along the spike are open. For seed collection, allow flower spikes to fully mature on the plant, then cut seed heads and dry them indoors. Collect seeds once capsules dry and split naturally. Scatter seeds in fall or early spring for naturalized displays.
Fun Facts
- 🌱 Maunaloa's name comes from the Hawaiian volcano Mauna Loa, and the common name 'Sky Rocket' refers to the explosive upward growth of flowers in the second year.
- 🌱 The tubular flowers are specifically co-evolved with hummingbirds—the bright red-orange color and tubular shape are ideal for hummingbird beaks, and the flowers produce copious nectar as a reward.
- 🌱 In its native habitat (southwestern US mountains and high deserts), maunaloa grows at elevations between 5,000-9,000 feet and can withstand frost, snow, and drought with remarkable resilience.
Gardening Terms
New to gardening? Learn about terms used in this guide:
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