'Summer Nights' Delphinium
Perennial
- Cobalt blue flowers look lovely in cut-flower arrangements.
- Attracts hummingbirds & butterflies, but deters deer!
- Exceptionally cold-tolerant, lovely summer bloomer.
- Zones 3-7, sun, 10-12″ tall x 10-12″ wide at maturity.
ZONE
EXPOSURE
HEIGHT
Description
Details
Common name: Delphinium, Larkspur
Zone: 3 - 7
Sun exposure: Sun (> 6 hours sun)
Height x width: 10-12" X 10-12"
Flower color: Blue
Foliage color: Green
Season of interest: Summer
Bloom time: Summer
Features:Low flammability, cold tolerant, cut flower, pollinator-friendly, space saving, summer blooming, container friendly, deer-resistant
Uses: Accent, border, container plantings, cottage gardening, foundation planting, massing, naturalizing, specimen
How to Grow
Light: Full sun (> 6 hours sun).
Water: Best to keep moist - do not dry out.
Spacing: 1.5 - 2 feet
Fertilizing: Delphiniums are heavy feeders. Use Osomocote before new growth begins in spring.
Winterizing: Mulch roots in cold regions for protection
Maintenance & pruning: Deadhead after the first flush is finished for repeat blooms later in the season.
Plant spacing is based on the ultimate width of the plants. This figure is normally given as a range; for example, 3-5’. If you live in a cold climate and/or want plants to fill in more quickly, plan to space at the shorter end of the range. If you live in a warm climate, are on a limited budget, or are willing to wait longer for plants to touch, use the higher end of the range. Using the larger number is recommended when calculating distance from a building or structure. There’s really no such thing as "maximum spacing": if you don’t want your plants to touch, you can space them as far apart as you’d like. All plant spacing is calculated on center, or in other words, the centers of the plants are spaced one half of their eventual width apart:
Unless you are planting in a straight line, as you might for hedges or edging, space your plants in a staggered or zig-zag pattern for a more interesting and naturalistic look:
Not sure just how many plants will fit in your garden? Our calculator gives you the exact amount of plants required for your space. Simply update the values and the calculator will re-calculate accordingly. Spacing information can be found in the 'How to Grow' tab on each plant's page.
