How to Grow Redleaf Poorweed
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Redleaf Poorweed
Acaena microphylla
groundcoverAcaena microphylla is a low-growing New Zealand native groundcover with tiny gray-green leaflets and distinctive burgundy-red spikes that develop into ornamental seed heads. This creeping perennial spreads via runners and is prized for its fine texture, colorful foliage, and interesting architectural elements in alpine and rock gardens.
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Example Redleaf Poorweed timeline · Pittsburgh, PA (Zone 6b)
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Plant Redleaf Poorweed
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 Redleaf Poorweed
Late summer into fallBefore the first fall frost (≈ Nov 8)
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Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 5-9, with best performance in cooler zones 5-7
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Get my Redleaf Poorweed timeline →Growth Stages
Establishment
4-8 weeksYoung plantlets developing fine, compound gray-green foliage with minimal spread
Keep soil consistently moist but not wet; protect from direct afternoon sun in hot climates; pinch tips to encourage branching
Vegetative Growth
3-6 monthsPlant sends out runners and creates a dense, creeping mat of finely textured foliage; leaves may show reddish or bronze tints
Reduce watering as roots establish; allow runners to spread naturally or guide with pegs; apply light mulch of gravel
Flowering
2-3 months (late spring to early summer)Inconspicuous tiny green or yellowish flowers appear on short spikes; blooms are modest and easily overlooked
Little special care needed; flowers attract pollinators but are not the main feature
Seed Head Development
2-4 monthsFlowers develop into distinctive reddish, burgundy, or rust-colored spiny seed heads (burrs) that persist and provide ornamental value
Leave seed heads in place for garden interest; deadhead only if self-seeding is unwanted; seed heads attract wildlife
Dormancy/Winter
3-4 monthsFoliage remains semi-evergreen to evergreen (depending on climate); growth slows considerably in cold regions
Reduce watering significantly; ensure excellent drainage to prevent rot; provide shelter in zone 5; no fertilizer needed
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Improve air circulation; avoid overhead watering; remove infected foliage; apply sulfur dust if severe; choose resistant cultivars
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Spray with water to dislodge; increase humidity if indoors; use miticide only in severe infestations
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and
(Pythium, Phytophthora)
Ensure perfect drainage; avoid waterlogging; remove affected plants; treat soil with fungicide if needed
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and
Remove by hand; use copper barriers; apply slug bait cautiously; encourage ground beetles
Uses
Rock and Alpine Gardens
OrnamentalAcaena microphylla is prized as a groundcover in rock gardens, alpine troughs, and scree gardens, where its fine texture and burgundy seed heads provide visual interest without overwhelming delicate companions. [source]
Container and Trough Gardening
OrnamentalIts compact, creeping habit makes it ideal for well-draining containers, troughs, and hypertufa bowls, especially in cool-season displays. [source]
Pollinator and Wildlife Support
WildlifeThe flowers attract small insects, and the persistent seed heads provide food for birds and insects; serves as a low-maintenance native plant option in gardens prioritizing biodiversity. [source]
Foliage and Texture
OrnamentalThe finely divided, gray-green foliage and reddish tones create striking textural contrast with bolder-leaved neighbors in mixed borders or massed as a living groundcover. [source]
Low-Maintenance Xeriscaping
HouseholdOnce established, Acaena microphylla is drought-tolerant and requires minimal fertilizer or maintenance, making it suitable for water-wise, eco-friendly gardens. [source]
Harvest Tips
Not harvested for yield. Enjoy foliage year-round; cut or deadhead seed heads if over-seeding becomes a problem. Divide clumps in spring or fall to propagate.
Fun Facts
- 🌱 The distinctive spiky seed heads are the origin of the common name 'poorweed'—the burrs historically clung to sheep's wool and were a nuisance to farmers, yet the plant is increasingly celebrated in modern ornamental gardens.
- 🌱 Acaena microphylla is native to New Zealand and thrives in the cool alpine and subalpine zones of those mountains, making it particularly at home in cooler climates where many other plants struggle.
- 🌱 The foliage often displays bronze, reddish, or burgundy hues, especially in response to cool temperatures and sun exposure, creating a natural seasonal color show without requiring special cultivars.
Gardening Terms
New to gardening? Learn about terms used in this guide:
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