Delphinium Pacific Giant Black Knight is a perennial variety that is early to flower and grows to a height of 1.8m.   It produces Dark Blue Purple Flowers with a Dark Bee.  Attractive to Bees.  Ideal for Borders.

Delphinium Black Knight is a striking and popular variety of delphinium known for its tall, stately stature and dramatic deep purple-black flowers. These elegant blooms make a bold statement in summer gardens and cut flower arrangements. While delphiniums can be a bit more challenging to grow than some other flowers, with proper care and attention, you can successfully cultivate these beautiful plants in your own garden.

Choosing a Planting Site

Delphinium Black Knight prefers full sun to partial shade. Choose a planting site that receives at least six hours of direct sunlight per day. The soil should be well-drained and fertile, with a slightly acidic to neutral pH. If your soil is heavy or clay-like, amend it with organic matter, such as compost or aged manure, to improve drainage.

Sowing Seeds

Delphinium Black Knight seeds can be sown indoors or outdoors. For indoor sowing, start the seeds 6-8 weeks before the last frost. Fill individual pots or seed trays with a sterile seed starting mix and sow the seeds thinly on the surface. Cover the seeds with a very fine sprinkling of compost or vermiculite and place the pots in a warm, bright location, keeping the soil moist but not soggy. Germination should occur within 14-21 days.

Transplanting Seedlings

Once the seedlings have developed two sets of true leaves, they are ready to be transplanted outdoors. Harden off the seedlings gradually by exposing them to outdoor conditions for a few hours each day for a week before transplanting. Choose a suitable planting site that receives full sun to partial shade and has well-drained soil. Space the seedlings 12-18 inches apart.

Watering and Fertilizing

Delphinium Black Knight plants require regular watering, especially during hot, dry periods. Water deeply and infrequently, allowing the soil to dry slightly between waterings. Overwatering can lead to root rot.

Fertilize the plants every few weeks with a balanced liquid fertilizer to promote healthy growth and abundant blooms.

Staking

Delphinium Black Knight plants can grow up to 6 feet tall, so staking is often necessary to prevent them from toppling over. Use bamboo stakes or sturdy metal supports, and tie the stems loosely to the stakes as the plants grow.

Pests and Diseases

Delphinium Black Knight plants are relatively resistant to pests and diseases, but keep an eye out for common garden pests like slugs, snails, and aphids. If you notice any pests, treat the plants with an organic insecticide or insecticidal soap.

Overwintering

Delphinium Black Knight plants are hardy in zones 3-8. In colder climates, they may need some winter protection. Apply a thick layer of mulch around the base of the plants to help insulate the roots.

With proper care and attention, you can enjoy the beauty of Delphinium Black Knight in your garden for many years to come.

DELPHINIUM PACIFIC GIANT BLACK KNIGHT SEEDS - DARK BLUE FLOWERS WITH DARK BEE - 50 SEEDS

  • Product Code: 50 DELPHINIUM PACIFIC GIANT BLACK KNIGHT SEEDS
  • Availability: In Stock
  • £3.99


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