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2024 Seed Catalog

Delphinium Pacific Giant Black Knight - Delphinium elatum

PR08206

Pacific Giant Black Knight

Delphinium Seeds

Pacific Giant Black Knight delphinium flowers are a gorgeous dark violet-purple. Black Knight is the darkest-colored delphinium in the Pacific Giant series.

Huge 3 in. double summer flowers are excellent for cutting. When first flower spike is removed immediately after bloom, additional spikes quickly form. Plants grow 4-7 ft. tall, need staking to protect heavy flower spikes from the wind. The palmate-shaped leaves are large.

Pacific Giant Black Knight delphinium is a dramatic plant for the cottage garden or the back of borders. Winter hardy to zone 3.

50 seeds - $3.49
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View all of our Delphinium varieties

Growing Pacific Giant Black Knight Delphinium Seeds

Bee introduces how to plant

Plant Delphiniums Seeds: Sow seeds in cell packs or flats, press into soil, fully cover. Darkness will aid germination. Kept at 55°F., germination is in 14-35 days.

Grow Delphiniums: Germination rate of delphinium seed is improved (if prior to sowing) seeds are placed in a ziplock bag with a small amount of moist growing media (or a moist paper towel), placed in the refrigerator for 2 weeks.

Shipping Information

U.S. Shipping Rates

Free shipping on U.S. orders over $60.00.
Free priority shipping on U.S. orders over $150.00.

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


International Shipping Rates

Shipping to Canada is $13.99.
International shipping to all other countries is $15.99.

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 replacements or issue a refund.