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Hollyhock seed packet with botanical illustration on a clean background
Full hollyhock plant showing tall spires of flowers growing in a sunny garden border
Back of hollyhock seed packet with botanical instructions on a clean background
Side of hollyhock seed packet with botanical illustration on a clean background
Tall hollyhock flowers blooming on upright stems with layered petals in a cottage garden border

Hollyhock 'Nigra' Seeds

Alcea rosea 'nigra'

Tall, strong, dark-tousled blooms. Glossy, deep chocolate maroon flowers. Hollyhock 'Nigra' is a modern twist to a cottage garden style.

Approx 30 seeds

  • Cut Flowers
  • Pollinator-Friendly
  • Compact for Pots
  • Low Maintenance

Hollyhock 'Nigra' Seeds – Quick Growing Guide

Hollyhock 'Nigra' seeds produce striking black flowers ideal for adding height and drama to borders. Sow from February to June or September to October. These biennial flowers thrive in full sun with regular watering and are excellent as cut flowers or garden accents.

How to Sow, Grow and Harvest Hollyhock 'Nigra' Seeds

  • Sow:Feb–Jun, Sep–Oct
  • Germination:7–14 days
  • Grow:Full sun, well-drained soil, support tall stems
  • Water:Keep soil moist but not waterlogged
  • Harvest:Cut flowers in summer when blooms open
  • Best for:Beds, borders, cut flower gardens

Grow in Your Garden

Hollyhock 'Nigra' – Deep Chocolate Maroon Blooms

Calendar

Hollyhock 'Nigra' Seeds planting calendar: Feb–Jun, Sep–Oct: Sow • May–Aug: Flowers or harvest

Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
SowFlowers / Harvest

How to Grow

Hollyhock 'Nigra' seeds can be sown outdoors in either spring or autumn, taking advantage of the sowing months from February to June and September to October. This biennial thrives in full sun and prefers well-drained soil to develop its striking deep chocolate maroon flower spikes in the second year.

  • Sowing

    Sow the seeds singly in damp, well-drained soil and cover lightly with soil. To encourage germination, place the sown seeds in a sealed clear container in a sunny spot during the recommended sowing months.

  • Growing

    Once seedlings emerge, thin them to allow enough space for growth, as Hollyhock 'Nigra' can develop tall flower spikes that benefit from spacing suited to a 40 cm pot size or garden bed. Providing support may be necessary to keep the tall stems upright during the growing months from May to August.

  • Plant care

    Water the plants regularly to keep the soil moist but not waterlogged, especially during dry spells in the growing season. Deadhead spent flowers to encourage prolonged blooming and cut back after flowering to maintain plant health and appearance.

About Hollyhock 'Nigra'

A classic cottage-garden biennial with tall spires of blooms, hollyhocks are hardy, pollinator-friendly and full of presence. Loved by bees, they thrive in sunny borders and produce long stems that work beautifully as cut flowers. Once established, they’re reliable, resilient, and often self-seed for future summers.

  • Cut Flowers
  • Pollinator-Friendly
  • Compact for Pots
  • Low Maintenance

Eventual height & spread

0.6m
2m
Plant

History of Hollyhock 'Nigra'

Native to Turkey and parts of Asia, hollyhocks have been cultivated in Britain since the 16th century. The 'Nigra' variety stands out with its unique dark blooms, adding a modern twist to traditional cottage gardens.

Other NamesAlcea rosea, Alcée Rose, Althaea ficifolia, Althaea rosea, Althea Rose, Hollyhock Flower, Malva, Malva Flower, Malvae Arboreae Flos, Passerose, Rose Mallow, Rose de Mer, Rose Papale and Rose Trémi
Pet/Baby SafeKnown to be toxic

FAQs

Reviews

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Elsewhere in the range

Recent reviews of other Herboo seeds. These are not ratings of Hollyhock 'Nigra' Seeds.

26 Aug 2026

Can't go wrong with Cosmos

Lovely packet of seeds, bought one for me and one as gift :)

Gareth
20 Aug 2026

Good card gifts

Bought a couple of these as card gifts for friends and they loved them

Flavia
12 Mar 2026

Good tips

Liked how you gave tips on how best to sow. nicely done

Joel C.