Due to a high volume of orders, and staffing limitations in place to keep our team safe, we have temporarily stopped accepting new orders. We continue to fulfill existing orders.

We will resume accepting new orders on Friday, February 26th at 8 AM (Pacific Time). Please allow 4 to 6 weeks for U.S. delivery. We appreciate your patience and support.

Shipping - $5.99 U.S. | $9.99 Canada | $14.99 International | Free shipping this week on U.S. orders over $60.

2021 Seed Catalog

Hollyhock Blacknight flowers
Hollyhock Blacknight flower
Best Seller

PHLL059

Black­night

Hollyhock Seeds

Blacknight hollyhock is a first year-flowering, true perennial hollyhock to 5-6 ft. tall and up to 5 ft. across. Large single flowers of the deepest purple-black appear from late spring through early fall. Plants are winter hardy to zone 3.

Grow Blacknight hollyhock with Soulmate butterfly weed.

10 seeds - $3.99
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Growing Black­night Hollyhock Seeds

Bee introduces how to plant

Plant Hollyhock Seeds: Sow seeds in 2 in. pots or cell packs, press into soil and lightly cover. Kept at 70-75° F., germination is in 14-28 days. Can direct sow into prepared seed beds in groups of 3-4 seeds, spaced 2-3 ft. apart. Thin to strongest plant.

Grow Hollyhock: Full sun, part sun in hottest climates. Hollyhock plants perform best in fertile soil with regular moisture. Irrigate from below and provide good air circulation. True perennial hollyhocks noted in description. Most are biennials, or short-lived perennials. Many hollyhocks flower the first season when started early. After flowering cut back plants hard, to within a few in. of the ground. Continue to water and fertilize. Plants repeat bloom in late summer and fall. Single flower hollyhocks attract hummingbirds and butterflies. Hollyhock plants will often self sow.

Shipping Information

U.S. Shipping Rates

Free shipping on U.S. orders over $60.00.
Free priority shipping on U.S. orders over $125.00.

Standard U.S. shipping is $5.99.
Priority U.S. shipping is $9.99.


International Shipping Rates

Shipping to Canada is $9.99.
International shipping to all other countries is $14.99.

Satisfaction Guarantee

We guarantee all the seeds we sell for one full year from the date of purchase. If you are unsatisfied with any seeds purchased from Swallowtail Garden Seeds, we will issue a refund. For customers in the U.S., we can send one-time replacement packets or issue a refund.