How to Grow Herb Bennet
Geum urbanum
Herb Bennet is a tough, cheerful UK native wildflower that thrives in partial to full shade, making it ideal for woodland gardens, hedgerows, and shaded borders. Plant in any reasonable soil, spacing about 30 cm apart. Small bright yellow flowers appear from May through to September, providing long-season interest for bees and hoverflies. Deadhead spent blooms to prevent excessive self-seeding, or let a few go to seed to feed birds. Divide clumps every 3-4 years in spring to keep plants vigorous.
Yearly Lifecycle
Care Essentials
Apply a balanced general-purpose feed or a thin layer of garden compost in spring as new growth emerges.
Watch For
- Slugs and snails on young foliage
- Aphids on flower stems in summer
- Powdery mildew in dry spells
Companions
Digitalis purpurea, Polystichum ferns, Alchemilla mollis, Primula vulgaris
Care Requirements
Light
Partial shade to full shade
Thrives in dappled shade under trees or in north-facing borders. Tolerates more sun in moist soils but may scorch in hot, dry, exposed positions.
Watering
Low to moderate; drought-tolerant once established
Water regularly in the first season to establish roots. Once settled, tolerates dry spells well. Moist, humus-rich soil produces the best flowering display.
Fertilizing
Light feed in spring
Apply a balanced general-purpose fertilizer or a thin layer of garden compost in spring. Avoid heavy feeding, which produces excessive leafy growth at the expense of flowers.
Pruning
Deadhead to limit self-seeding; cut back in late winter
Remove spent flower heads through summer to prevent excessive self-seeding. Cut back old basal foliage to near ground level in late winter or early spring before new growth begins.
Spacing
30 cm apart
Space plants 30 cm apart to allow for clump spread. Plants self-sow freely so some thinning may be needed over time.
Growing Tips
Deadhead to control self-seeding
Remove spent flower heads promptly to prevent the plant spreading too freely. The hooked burr seed heads cling to clothing and fur, dispersing widely. Leave a few for birds.
Divide every 3-4 years
Clumps gradually lose vigour. Lift and divide in early spring before flowering, replanting the healthiest outer sections. This also prevents overcrowding.
Ideal for dry shade
One of few flowering perennials that tolerates dry shade beneath trees or along north-facing walls. Once established it is drought-tolerant, though moist soil produces more flowers.
Pollinator value
The simple, open yellow flowers are excellent for bees and hoverflies from May onwards. Avoid deadheading too zealously early in summer to maximise pollinator benefit.
Spacing & Planting
| Plant spacing | 30 cm |
| Row spacing | 35 cm |
| Mature height | 45 cm |
| Mature spread | 35 cm |
Space 30 cm apart in borders or woodland edges. Self-sows freely; deadhead to control spread.
