Eupatorium cannabinum
hemp agrimony
Robust, attractive and easy to grow, this native perennial is ideal for mixed planting schemes. The red-flushed stems of hemp agrimony support handsome, lobed foliage, and they’re crowned in summer, with large, flat-topped clusters of pink, purple or white flowers, which are a magnet for butterflies.
How to care for Eupatorium cannabinum:
Plant Eupatorium cannabinum in full sun or partial shade in reliably moist soil, or sink aquatic pots into a pond margin with 5-10cm (2-4in) of water above the crown. Space 60-90cm (24-36in) apart and water well to keep the soil damp at all times.
Cut back old stems in late winter or early spring and divide every 3-4 years to maintain vigour. To keep plants controlled, leave them in aquatic pots when planting or lift and split congested clumps regularly to prevent excessive spread.
Cut back old stems in late winter or early spring and divide every 3-4 years to maintain vigour. To keep plants controlled, leave them in aquatic pots when planting or lift and split congested clumps regularly to prevent excessive spread.
Sowing instructions:
In spring, surface sow seeds in trays filled with a good seed mix, lightly pressing them into the compost. Maintaining temperatures around 18-20°C (64-68°F), but if germination has not begun after 6 weeks, cold stratify by placing the seed tray in the fridge for 4 weeks before returning to warmer conditions.
When large enough to handle, grow on in individual pots and gradually gradually acclimatise before planting out. When in growth, cut back and compost the stems after flowering, and remove unwanted seedlings as they appear.
When large enough to handle, grow on in individual pots and gradually gradually acclimatise before planting out. When in growth, cut back and compost the stems after flowering, and remove unwanted seedlings as they appear.
Flowering period:
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
Eventual height:
1.2m
Eventual spread:
1.2m
Position:
Full sun / light shade
Rate of growth:
Average
Soil:
Moderately fertile, moist, well-drained soil
Hardiness:
Fully hardy
-
This perennial dies back to below ground level each year in autumn, then fresh new growth appears again in spring.
approx 200 seeds
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