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Jet Black Hollyhock

This single hollyhock is about as close as a flower can get to really black, a deep, deep, purple it is very decorative and an excellent counterpoint in arrangements. While technically a biennial, hollyhock plantings last for decades as a result of division and self-seeding.

30 seeds




Alcea rosea

Biennial, zone 3-8

Germination: 10-21 days

Germination Temperature: Optimum soil temperatures 60-70ºF

Seed Planting Depth: Sow on the surface and lightly cover, seeds need some light to germinate

Starting Indoors: Start indoors 6-8 weeks before the last frost. Provide 60-70ºF soil temperature. Transplant after last frost, 18-24” apart

Sowing Outdoors:  Direct sow after the last frost or in the fall

Growth Habit: Columnar

Height and Width:  48-60" by 12-18"

Spacing: 12-24" apart

Light Needs: Full sun to part shade

Soil Needs: Fertile, moist, well-drained

Approximate days to flower from seed: Blooms in the second season

Uses: Cut flowers, back border of the flower garden, cottage gardens, attracts pollinators

Care: Water seedlings regularly until established. Amend soil with compost before transplanting.  Cut back stems as the blooms fade, this encourages more flower production. Leave some seed pods on the plant of you would like it to self-seed.

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    Poor Germination Rate

    I planted 18 seeds only 4 of them germinated. On the bright side those four plants are nice and healthy and I hope will bloom next year.

    Pinetree Garden Seeds

    Hi Joan, I am sorry your had such poor germination with the Jet Black Hollyhock. We do guarantee better germination of all our seeds and I would be happy to send replacements if you would like to try again, or I can offer a refund or credit, whichever you prefer. Please let me know what I can do to try and remedy this for you. ~Tammy