[data-breadcrumbs] { opacity: 1 !important; visibility: visible !important; } @media screen and (max-width: 767px) { [data-breadcrumbs] [data-breadcrumb-middle] { display: inline-flex !important; } [data-breadcrumbs] [data-breadcrumb-ellipsis] { display: none !important; } }

Common Knapweed Seeds

Botanical Name: Centaurea nigra

Nectar-Rich Purple-Pink Flowers
Exceptionally Tough And Easy To Grow
Loved By Bees, Butterflies And Moths
Seeds Provide Food For Birds

100 seedsSKU: 39254

Sent within 5-7 working days

£3.29

FREE Delivery on all orders over £45!

Buy with confidence - quality guarantee

High germination rates

Expert growing support available

DescriptionDetailsSow & GrowGrow InPlanting CalendarDelivery

Introduce a valuable native wildflower to your garden with tough and easy-going Common Knapweed. Its intricate purple-pink flower heads provide an excellent source of nectar and pollen for bees, butterflies, hoverflies and moths. Once the flowers fade, the seed heads offer food for visiting birds. This adaptable hardy perennial is ideal for wildlife gardens, informal borders and wildflower meadows.

Key information

Botanical Name: Centaurea nigra

Genus: Centaurea

Plant Class: Hardy Perennial

Characteristics & growing conditions

Plant Height: 60

Colour: Pink,Purple

Habitat: Branching,Upright

Position: Full Sun

Attractive to: Attractive To Bees, Attractive To Birds, Attractive To Butterflies, and Attractive To Hoverflies

SOW INDOORS February-April, thinly in pots or trays of compost, 0.5cm/quarter-in deep. Transplant into larger pots or trays when necessary. Harden off, then plant out May-June, spacing plants 25cm/10in apart. SOW OUTDOORS March-July, thinly and directly into the flowering position, 0.5cm/quarter-in deep. Thin seedlings as necessary. Leave some seed heads in place to provide food for birds.

Recommended growing locations.

Borders

Wildflower Meadows

J Jan F Feb M Mar A Apr M May J Jun J Jul A Aug S Sep O Oct N Nov D Dec

Sow Indoors

J Jan F Feb M Mar A Apr M May J Jun J Jul A Aug S Sep O Oct N Nov D Dec

Sow Outside

J Jan F Feb M Mar A Apr M May J Jun J Jul A Aug S Sep O Oct N Nov D Dec

Flowers / Harvest

J Jan F Feb M Mar A Apr M May J Jun J Jul A Aug S Sep O Oct N Nov D Dec

Hassle-Free Delivery

Looking for a hassle-free way to get your gardening essentials? Look no further than DT Brown! We know how important your garden is to you, and want you to be able to stock up on everything you need. All our delivery charges will automatically appear in your shopping basket.

Seed Only Orders

£2.95 delivery charge

Non-Seed Items

£6.95 delivery charge

Combined Orders

£7.95 delivery charge (e.g. seeds and plants)