Rosaceae
Largeleaf Avens: Ground Cover Plant
Geum macrophyllum
Largeleaf avens is an easy-care, cold-hardy perennial best suited to moist, part-shade to sunny garden spots with rich, well-drained soil. It tolerates brief dry spells once established but performs poorly in soggy winter ground. Deadhead spent flower stalks to tidy the burred seed heads, and divide clumps every few years to keep plants vigorous.
Every 5 days
Partial shade
5° - 27°C
50% - 80%
Categories
What is Largeleaf Avens?
Largeleaf Avens (Geum macrophyllum) is a easy-care plant from the Rosaceae family. Geum macrophyllum, or largeleaf avens, is a herbaceous perennial in the rose family (Rosaceae) native to North America, Kamchatka, and Japan. It forms a basal rosette of long-stalked, pinnately compound leaves with a large, rounded terminal lobe and smaller toothed leaflets beneath. From spring to s...
Largeleaf Avens grows up to 1.0m, spread of 45cm, watering every 5 days, 5°C – 27°C, 50–80% humidity. It is not suitable for indoor environments and safe for pets.
Unlike many tropical plants, Largeleaf Avens tolerates watering mistakes. Best for beginners. Unlike many popular species, Largeleaf Avens is safe to keep around pets.
How to Care for Largeleaf Avens?
TLDR: Largeleaf Avens needs Partial shade, watering every 5 days, and temperatures between 5-27°C with 50-80% humidity.
How Often Should You Water Largeleaf Avens?
Keep soil consistently moist, especially during the spring bloom period; water when the top few centimeters dry out and avoid letting the ground stay waterlogged over winter.
How Much Light Does Largeleaf Avens Need?
Grows best in partial shade to full sun; in hot climates give it afternoon shade to prevent leaf scorch, while cooler, cloudier regions can support fuller sun.
What Is the Best Soil for Largeleaf Avens?
Plant in rich, humusy, well-drained soil; it adapts to sandy, loamy, or clay soils as long as drainage is adequate, with a near-neutral pH.
What Pot Should You Use for Largeleaf Avens?
Not commonly grown as a houseplant; if containerized, use a wide, deep pot with ample drainage holes and a rich, moisture-retentive potting mix to support its spreading rosette and consistent water needs.
Care Schedule
Fertilize
Every 60 days
What Is Largeleaf Avens and Where Does It Come From?
Geum macrophyllum, or largeleaf avens, is a herbaceous perennial in the rose family (Rosaceae) native to North America, Kamchatka, and Japan. It forms a basal rosette of long-stalked, pinnately compound leaves with a large, rounded terminal lobe and smaller toothed leaflets beneath. From spring to summer, branching stems 30-100 cm tall carry small, five-petaled yellow flowers with numerous stamens, followed by distinctive bur-like seed heads whose hooked, reddish styles catch on fur and clothing to aid dispersal. It grows in moist woods, meadows, streambanks, and disturbed damp ground from low to subalpine elevations, ranging from Alaska south to California and Mexico, east across Canada and the northern United States.
How to Propagate Largeleaf Avens?
Clump Division
- Divide every 2-3 years to maintain vigor and prevent overcrowding.
- Water thoroughly after replanting and keep soil consistently moist until established.
- 1 Lift the clump
In early fall or spring, dig up the entire rosette clump with a garden fork, keeping as much root intact as possible.
- 2 Divide the crown
Use a sharp knife or your hands to separate the clump into sections, each with several leaves and healthy roots.
- 3 Replant
Replant divisions immediately at the same depth in enriched, moist soil, spacing them 30-45 cm apart.
Materials needed:
Seed Propagation
- Fresh seed germinates most reliably.
- Self-sows readily in garden settings once established.
- 1 Collect seed
Gather the bur-like seed heads once they turn reddish-brown and dry.
- 2 Sow
Sow seed shallowly, pressing onto the soil surface with barely any covering, outdoors in fall or cold-stratify for 4-6 weeks before spring sowing.
- 3 Grow on
Keep soil consistently moist; seedlings emerge within a few weeks and can be transplanted once they have several true leaves.
Materials needed:
How Big Does Largeleaf Avens Grow?
TLDR: Largeleaf Avens can reach up to 1.0m tall with Medium growth rate.
Max height
1.0m
Spread
45cm
Growth rate
Medium
Foliage
Deciduous
Plant Uses
Medicinal
Medicinal properties
Ornamental
Great for decoration
Ground Cover
Soil coverage
Medicinal Uses
- Root decoction used by Pacific Northwest peoples (including the Bella Coola, Chehalis, Hesquiat, and Quileute) to relieve stomach pain
- Chewed or bruised leaf poultice applied to cuts, boils, and skin sores
- Leaves valued as an astringent remedy for sore throats and toothaches
- Boiled root used in steam baths by the Haida to ease rheumatic pain
- Leaf infusion historically used as a contraceptive aid, with raw leaves chewed during childbirth
- Root used as a styptic and febrifuge (fever reducer) in traditional preparations
Is your plant showing symptoms?
Click on the symptom to discover possible causes:
What Diseases Commonly Affect Largeleaf Avens?
TLDR: Largeleaf Avens is susceptible to 3 known diseases. Monitor regularly for early detection.
Powdery Mildew
Powdery mildew is a common fungal disease caused by various fungi species including Erysiphe, Podosphaera, Oïdium, and Leveillula. It affects over 10,000 plant species worldwide. The disease thrives in warm, dry climates with high humidity and appears as a distinctive white powdery coating on plant surfaces.
Downy Mildew
Downy mildew is a fungal-like disease caused by oomycetes (water molds) that thrives in cool, wet conditions. It affects a wide range of plants, causing yellowing leaves with fuzzy white-gray growth underneath, leading to defoliation and reduced yields if left untreated.
Root Rot
Root rot is a serious fungal disease that affects the root system of plants, causing them to decay and die. It is primarily caused by overwatering, poor drainage, or soil-borne fungi such as Pythium, Phytophthora, Rhizoctonia, and Fusarium. The disease thrives in waterlogged conditions where roots are deprived of oxygen, making them susceptible to fungal infection.
Meaning & Symbolism
As a hardy wildflower that colonizes disturbed, damp ground across a huge swath of North America, largeleaf avens has come to symbolize resilience and quiet persistence. Its hooked, bur-like seed heads, built to hitch a ride on passing fur and fabric, are often read as an emblem of adaptability and far-reaching connection.
Compare with similar plants
| Attribute | Difficulty | Light | Watering | Pet Safe |
|---|---|---|---|---|
| Field Maple | Easy | Bright indirect | 14d | ✓ |
| Silver Birch | Easy | Direct sun | 14d | ✓ |
| Common Blanketflower | Easy | Direct sun | 10d | ✓ |
| Cushion Bush | Easy | Direct sun | 14d | ✓ |
Choose & Compare
Sources & References
- Lady Bird Johnson Wildflower Center - Geum macrophyllum
- NC State Extension Gardener Plant Toolbox - Geum
- Wikipedia - Geum macrophyllum
- BRIT Native American Ethnobotany Database
- Innisfree Farm - Geum macrophyllum (Avens Root)
- PNW Plant Disease Management Handbook - Geum Powdery Mildew
- PNW Plant Disease Management Handbook - Geum Downy Mildew
- USDA Forest Service - Plant of the Week: Geum macrophyllum
