Eupatorium cannabinum
Hemp agrimony, Dutch agrimony, St John's herb, Holy rope
- Height × spread
- 0.9m × 0.9m
- Position
- Full sun
- Hardiness
- Colder than -20C (RHS H7)
- Flowers
- Summer, Autumn
Availability
Please ask in store about availability
Many plants are seasonal. Call 01234 567890 to check current stock.
About this plant
This is a native plant that has made its way into the domestic garden. It has upright plummy coloured stalks carrying mid green paired leaves, long and slender and tapering to a point. At the top are pink domed flowering clusters that look fluffy as they mature and are extremely attractive to insects, including many colourful butterflies such as small tortoiseshell. Hemp-agrimony flowers in late summer and goes well into autumn. In the wild it is found on riversides and in marshes. This plant can be situated at the back of a border, or in a bog garden or pond margin in sun or partial shade and will tolerate most soils that are not too acidic or dry. It stands around 90cm (3ft) in height .
- Flower colour
- Pink
- Foliage colour
- Green
- Variegated
- No
- Scent
- No
- Shape
- Dome
- Height
- 0.9m
- Spread
- 0.9m
- Season of interest
- Summer, Autumn
- Flowers in
- Summer, Autumn
- Evergreen
- Deciduous
- Garden style
- Prairie garden
- Sun or shade
- Likes full sun, tolerates part shade
- Soil type
- Chalk, Loam (normal), Poor soil
- Soil pH
- All types
- Drainage
- Moisture retentive soil, Well drained soil
- Hardiness
- Colder than -20C (RHS H7)
- Borders & containers
- Borders
- Use for
- Ground cover, Rabbit resistant, Bee attraction
- Hazards
- No
Spring
Spring - late · Outdoors
Feed with slow release fertiliser
Apply a general purpose slow release fertiliser, spreading it around the root area of the plant as it is coming into growth. (Or apply a liquid feed at regular intervals throughout the growing season.)
This is a simple way to provide a nutrient boost as a single annual procedure.
Spring-Autumn · Outdoors
Water to keep the soil moist
For best results, this plant needs soil that is always moist. Water deeply and regularly as soon as soil appears dry. Even for established plants in the ground, a dry week can cause problems with some soils. Check plants in pots more often, especially in hot weather. Or install an automatic irrigation system which will do the hard work for you, even when you are away on holiday.
Without regular watering some plants never fully regain their beauty.
Spring - early-mid · Planting
Divide when too large
The plant can be divided if it becomes too large or another plant is required. This may involve physically dividing the clump in two, removing offsets or small bulbs or dividing rhizomes. The new plants can be grown in pots or planted in the ground.
Found in
More Eupatorium
Eupatorium
Hemp agrimony, Thoroughwort
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Dog fennel
Eupatorium maculatum Atropurpureum Group
Joe Pye Weed
Eupatorium purpureum
Trumpet weed, Sweet Joe Pye weed, Gravel weed, Gravelroot, Purple boneset, Queen of the meadow
Eupatorium purpureum 'Bartered Bride'
Joe Pye weed