Delphinium 'Pacific Giant Summer Skies' Seeds

Delphinium elatum 'Summer Skies' is a robust Hardy Perennial (H5). While individual plants are often short-lived (performing best for 3-4 years), their impact is unparalleled. These "Pacific Giants" are bred for colossal flower spikes that can reach up to 80cm in length on a single stem.

The "Second Flush" Secret: Delphiniums are one of the few perennials that can be manipulated into a second flowering season. If you cut the main flower spikes down to the ground immediately after they fade in mid-summer and feed the plant with a balanced organic fertilizer, it will often reward you with a second, slightly smaller flush of azure-blue blooms in September.

Bumblebee Specialist: Delphiniums are a primary target for long-tongued British bumblebees, such as the Garden Bumblebee. They are one of the few insects with the strength and anatomy to push through the complex floral structure to reach the high-energy nectar hidden deep within the spurs.

Delphiniums require a little attention in their early stages but grow with incredible speed once established.

How to Sow:
Sow indoors from January to March for flowers in their first year, or in September to overwinter. Pro Tip: Place the seed packet in the fridge for 2 weeks before sowing to break dormancy. Surface sow the seeds onto moist seed compost; do not cover them, as they require light to germinate. Keep at 15-18°C; germination typically occurs within 14-21 days.

Where to Plant:
They demand full sun and deep, rich, fertile soil. They are heavy feeders and appreciate a generous mulch of well-rotted organic matter in spring. Space plants 75cm apart to allow for good air circulation, which helps prevent powdery mildew.

Ongoing Care:
Stake Early: These are giants. Insert sturdy bamboo or hazel supports when the plants reach 30cm tall to protect the heavy spikes from wind damage. Slug Patrol: Protection is vital in spring, as slugs find the emerging Delphinium shoots irresistible. Use wool pellets or copper tape to guard the crowns as they break dormancy.

Delphiniums are the kings of the border, but they look best when their rigid vertical lines are softened by lighter companions from our available range:

• ☁️ Ammi majus: The Texture Contrast. Plant drifts of Ammi majus in front of your Delphiniums. The frothy white lace softens the rigid blue spikes and hides the lower stems of the Delphiniums, which can sometimes look "leggy" as they reach for the sky.
• 🌼 Cosmos 'Purity': The Softener. The large, simple white faces of 'Purity' Cosmos provide a relaxed, informal feel that stops a Delphinium border from looking too stiff. They flower at exactly the same time, creating a quintessential blue-and-white summer display.

Sow indoors in early spring for a majestic display from June, with a secondary flush often appearing in September.