Blacknight Hollyhock Seeds - Hollyhock, 20 seeds

Quantity: 20 Seeds / pack

Blacknight hollyhock (Alcea rosea) is prized for its velvety, deep maroon blooms that darken to near-black on tall 5–7 foot spikes. A biennial to short-lived perennial, it spends the first year building foliage and then delivers a dramatic flower show the second summer — and it self-sows to return on its own.

Why choose our seeds?

• Striking near-black flowers no other cottage-garden plant offers
• Tower over fences and backgrounds on tall, sturdy spikes
• Self-sows once established, so blooms come back year after year

How to grow Blacknight Hollyhock seeds

Choose Your Planting Method

• Indoors: Start 6–8 weeks before the last frost.
• Outdoors: Direct sow in spring after the last frost, or in late summer for blooms the next year.

Prepare Your Materials

• Seed-starting trays or pots (if indoors)
• Well-draining potting mix
• Spray bottle for misting

Sowing the Seeds

• Sow on the surface and cover very lightly — light helps hollyhock seeds germinate.
• No pre-treatment is needed.

Provide the Right Conditions

• Light: Bright light; surface-sown seeds need light to sprout.
• Temperature: 60–70°F (15–21°C) is ideal.

Germination

• Seedlings emerge in about 10–14 days.
• Keep the soil surface lightly moist until sprouts appear.

Transplanting

• Move seedlings out after the last frost; disturb roots as little as possible.
• Space plants 12–18 inches apart against a wall, fence, or the back of the border.

Care Tips

• Sun: Full sun (tolerates part shade).
• Water: Moderate watering; established plants are fairly tolerant of dry spells.
• Fertilizer: Average garden soil is fine.
• Stake tall spikes in windy spots; remove spent spikes or let a few set seed for next year's plants.

Bloom Time:

Blooms in the second summer; flowering spikes appear summer to early fall. First-year plants form a leafy rosette only.