Bigroot Geranium
Geranium macrorrhizum
Bevan's Variety
About this plant
Geranium macrorrhizum, commonly called Bigroot Geranium, is a hardy perennial groundcover known for its aromatic leaves and pink to purple flowers. It spreads by rhizomes, forming a dense mat that helps control weeds. The plant is valued for its ability to grow in shady or dry spots where other plants struggle. Its fragrant foliage releases a pleasant scent when crushed, making it popular in gardens and natural landscaping.
Taxonomy
- Genus
- Geranium
- Family
- Geraniaceae
- Higher classification
- Order Geraniales
- Plant type
- Perennial
- Lifespan
- Perennial
Origin & Distribution
- Native region
- Balkans, southeastern Europe
- Distribution
- Native to southeastern Europe; widely cultivated in temperate regions worldwide as a groundcover.
Care
- Light preference
- Partial shade
- Suitable locations
- Outdoor, Balcony, Greenhouse
- Preferred window facing
- East-facing, West-facing, South-facing
- Watering frequency
- Moderate
- Watering interval
- 5–10 days
- Humidity
- Normal
- Minimum
- -30 °C
- Maximum
- 30 °C
- Optimal
- 15-25 °C
- USDA hardiness zones
- 4-8
- Soil pH
- 6.0-7.5 (slightly acidic to neutral)
- Soil type
- well-draining loam or sandy soil
Watering. Water moderately, allowing the soil to dry out slightly between waterings. Avoid overwatering to prevent root rot.
Fertilizing. Fertilize once in early spring with a balanced, slow-release fertilizer to support healthy growth. Additional feeding is usually not necessary.
Geranium macrorrhizum is a tough and easy-to-grow groundcover that tolerates shade and dry conditions well. It prefers well-draining soil and does not need frequent watering. Watch for overwatering, which can cause root problems. Maintenance is low, mainly occasional pruning to keep it tidy.
Propagation
- Propagation methods
- Division, Cuttings, Seeds
- Care difficulty
- Easy
Ornamental features
- Flowering
- Yes
- Flowering period
- spring
Aromatic, deeply veined leaves with pink to purple five-petaled flowers in spring; forms a dense, spreading mat.
Toxicity & Safety
- Toxic to humans
- Non-toxic
- Toxic to pets
- Non-toxic
- Weed potential
- Low spread
Non-toxic to humans and pets; safe to have around children and animals.
Allergy information
- Allergy risk
- Low
- Allergy triggers
- Pollen, Skin contact
- Pollen level
- Low
Geranium macrorrhizum may cause mild allergic reactions in some people, especially those sensitive to pollen or plant sap. The main triggers are its pollen and contact with its leaves or sap, which can cause skin irritation or mild respiratory symptoms. To reduce exposure, avoid touching the plant if you have sensitive skin and keep it away from areas where pollen can spread indoors.
Common problems
Overwatering can lead to root rot. In very wet or poorly drained soil, the plant may suffer. Occasionally, pests like aphids or fungal diseases may appear but are usually not serious.
Uses
Used as a groundcover in gardens and landscapes, especially in shady or dry areas. Its aromatic leaves and attractive flowers add visual and sensory interest.
Notes
Prune back after flowering to maintain shape and encourage fresh growth. It can be divided every few years to control spread and rejuvenate the plant. Avoid waterlogged soil to prevent root rot.