SKU: 16870805110
plant hollyhock seeds

plant hollyhock seeds Jet Black Hollyhock – Pinetree Garden Seeds

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Description

plant hollyhock seeds Jet Black Hollyhock – Pinetree Garden SeedsThis 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 PLANTING Alcea rosea Biennial, zones 3 8 Germination: 10 21 days Germination Temperature: Optimum soil temperatures 60 70F Seed Planting Depth: Sow on the surface and

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

 

PLANTING

Alcea rosea

Biennial, zones 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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SKU: 16870805110

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Michael R.
Bozeman, US
★★★★★ 5
Very nice product.
Size: CB-003
Haven’t needed to use it yet, but it is definitely a quality product.
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Reviewed in the United States on September 1, 2025
M
Verified Purchase
M. M. C.
Carnegie, US
★★★★★ 5
It works
Size: CB-M03H
I use it on a power tool as regular drill bits seem to not work to well with the plugs. They leak air. Doing it by hand is to hard
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Reviewed in the United States on June 20, 2025
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Kirk T.
Chelsea, US
★★★★★ 1
Doesn’t Cut Steel Belts in Tires
Size: CB-M03H
Doesn’t cut steel belts in tires to facilitate repair.
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Reviewed in the United States on May 5, 2025
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Only Rates Packaging
Fort Morgan, US
★★★★★ 5
Pattern and roughness appropriate but still need to test
I haven't had a flat tire yet, so I also haven't had occasion to test these but they seem like great value for an extremely low price (especially versus a new tire.) I have handled them to try and gauge how quickly they'd smooth a hole, and they're rough / sharp and aggressive enough that I expect them to work quickly and well on not only tires, but on a variety of other materials. This pattern in particular should allow material to be shed and then passed backward pretty easily without clogging things up or slowing them down. If you've bothered to buy a patch kit for your tires, you really ought to have one of these around.
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Reviewed in the United States on January 18, 2026
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Don
Los Angeles, US
★★★★★ 5
Thank you!
Size: 1/4-Inch - With Adapter
Thank you!
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Reviewed in the United States on April 27, 2023

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