Unpack bare roots or rhizomes on arrival and plant them within a week. Until then, keep them somewhere cool and ensure the roots remain slightly moist, never wet.
Out of season
Andropogon
'Blackhawks'
big bluestem
Andropogon 'Blackhawks', also known as big bluestem or shepherd’s beard, is the garden’s answer to a style icon. Its tall, elegant blades emerge in deep green hues that slowly darken to shades of burgundy and almost black as the season progresses. This ornamental grass doesn’t just stand around looking good—it sways with the breeze, adding movement and texture to any planting scheme. Whether you’re designing a prairie-inspired garden or adding a touch of contrast to traditional borders, Andropogon 'Blackhawks' is a versatile choice with a touch of theatrical flair.
Come autumn, Andropogon 'Blackhawks' reaches its peak, with its dramatic colours stealing the show. It pairs beautifully with warm-toned late bloomers or silvery foliage, creating a striking seasonal display. Its low-maintenance nature makes it a favourite for gardeners seeking beauty without the hard labour, while its wildlife-friendly credentials attract bees and butterflies. This grass is perfect for those who appreciate understated sophistication with a moody edge. Officially known as Andropogon gerardii 'Blackhawks'®, this is one grass that proves ornamental plants can be as bold and stylish as the most dazzling flowers.
Quantity
Plant profile
Plant calendar
Remove the packaging straight away, check the compost and water thoroughly if dry. Check the plant’s hardiness before placing it outdoors. Plant into a border or permanent container within a month, choosing the position recommended for the variety. Keep the top of the root ball level with the surrounding soil, firm gently and water well.
Soak the roots in water for three to six hours immediately before planting. Keep any crown, buds or emerging shoots above the water where possible.
Pot most bare roots into 15–20cm pots filled with peat-free multipurpose compost. Large or depth-sensitive roots, including peonies, are often best planted directly into borders.
Arrange the roots naturally without bending them. Cover the roots completely, positioning the crown and buds at the depth recommended for that particular perennial.
Keep pots in a sheltered outdoor position and water whenever the compost begins to dry. Grow on until roots hold the compost together when lifted from the pot.
Plant into a suitable border or permanent container once well rooted. Add a label and water regularly throughout the first growing season while the perennial establishes.
- Botanical name
-
Andropogon gerardii 'Blackhawks'®
syn. Andropogon furcatus - Flower colour
- Purple
- Established height
- 1-1.5m
- Established spread
- 50-70cm
- Growing skill
- Easy to grow
- Habit
-
Upright
Clump-forming - Hardiness
- Fully hardy
- Leaf colour
- Green, purple, blue, near-black
- Mouse resistant
- Yes
- Plant size
- 1
- Plant spacing
- 5 plants per m2
- Pollinator friendly
- No
- Position
- Sheltered
- Rabbit resistant
- Yes
- Scented
- No
- Soil acidity
- Any
- Soil moisture
-
Free draining
Dry - Soil type
-
Loam
Sandy
Loam-based compost - Suitable for
-
Borders
Coastal gardens
Cottage gardens
Gravel gardens
Large containers
Low maintenance gardens
Wildlife gardens - Sunlight
-
Full sun
Dappled shade - Toxicity
- No report
- Years to establish
- 2-3 years
Thrives in full sun
Perennial
Fully hardy
Packed peat-free
Drought tolerant
Low maintenance
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Expert care from
choice to delivery
Our horticulturalists prepare every bulb and plant with the utmost care. From selection to packing, each one receives expert attention before beginning its journey to your garden.
Better by nature
From cultivation to packaging and delivery, we are always looking for ways to lessen our environmental impact.
Growing together
Our care team of horticultural experts is on hand to support you choose and garden with confidence.
World of wonders
A collection of world-renowned flower bulbs and perennials of exceptional beauty and character.
Chosen to thrive
Every bulb and plant is sourced, selected and prepared with an expert eye for their quality and garden performance.
