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Hollyhock 'Blacknight'Alcea roseaAlthaea rosea

Hardy Perennial

What is Hardy Perennial?
A plant that lives for more than two years.
Capable of withstanding outdoor winter temperatures down to -15C.

£19.99

Sultry near-black flowers!

Statuesque plants that add height and drama to borders

A favourite with pollinating insects

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Hollyhock 'Blacknight'

1 x 1 litre potted plant

£19.99

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Height Up to 2m (6.5ft)
Spread Up to 60cm (24in)

Hardy Perennial

cottage gardenswildlife gardens

full sun

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Flowering Months Planting Out Months

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Description

Tall, dark and handsome! Hollyhock ‘Blacknight’ is a classic variety, universally admired for its sultry, near-black flowers with pale yellow eyes. The large, single, saucer-shaped flowers with silky petals glisten in the sunshine, brooding over borders on sturdy stems that can reach up to 2 metres. This magnificent hollyhock always attracts admiring glances, adding dark mystery and romance to the garden. It is also a magnet for pollinators. Ultimate height: 2m (6.5ft) Ultimate spread: 60cm (24in).

Plant height and spread is seasonal therefore we list by pot size rather than a defined plant size. The height and spread of the plant delivered will vary depending on the season, meaning arrival images are an indication only.

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1 x 1 litre potted plant (KA4593)

How to Grow
Plant out Hollyhocks in sunny borders in fertile, well drained soil. Choose a position that is sheltered from strong winds. Space hollyhock plants at least 60cm (24") apart to improve air circulation and help prevent hollyhock rust.

For more information and guidance check out our Gardening Guides.

More Info
Water regularly until hollyhocks are fully established. Support their tall stems with bamboo canes as the flower spikes develop. In autumn, cut back the old foliage and faded hollyhock flower stems, and apply a mulch of well rotted manure or garden compost to the base of the plant.
Delivery

Seeds and garden supplies will normally be delivered within the time period stated against each product as detailed above. Plants, bulbs, corms, tubers, shrubs, trees, potatoes, etc. are delivered at the appropriate time for planting or potting on. Delivery times will be stated on the product page above, or in your order acknowledgement page and email.

Orders for packets of seed incur a delivery charge of £2.99.

Orders which include any other products will incur a delivery charge of £6.99.

Where an order includes both packets of seeds and other products, a maximum delivery charge of £7.99 will apply - regardless of the number of items ordered.

Large Non-standard items may incur a higher, lorry delivery charge. Charges will be calculated at checkout, but an example of the lorry charges are listed below.

  • Red - £9.99.
  • Purple - £2.99.

For more information please visit our delivery charges information page by clicking here.

For more information on how we send your plants please visit our Helpful Guide on plant sizes.

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