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- Partial Sun to Full Sun (At Least 5 Hours of Direct Sunlight)
- Height 10 - 12 Inches
- Width 12 Inches
- Growing Zones 3-7
A perennial for cool climates with deep blue flowers, Summer Nights Dwarf Delphinium (Delphinium grandiflorum) will bloom all summer. The flowers rise on stalks above the lacy foliage, but this dwarf variety is shorter than most delphinium varieties, reaching about 10 to 12 inches high. This makes it a versatile landscape choice with a unique bloom color as a perennial in zones 3 through 7. It also will become a favorite cut flower for indoor arrangements.
Place Summer Nights in the front of a container to fill the lower portion with dark blue all summer, a nice contrast to taller plants in contrasting colors like orange or white. Or line a garden bed with these stunning perennials for all-season color in cooler climates and partly shady areas. It’s also an excellent front border plant along sidewalks or patios. Or fill a hill or bed with a large group of the delphiniums for a spilling water-like effect from its mass of blue flowers.
Summer Nights Dwarf Delphinium Care
Choose a spot in the landscape or for your container that gets full sun or part sun, for a minimum of 4 to 6 hours a day. Morning sun is better than harsh afternoon sun exposure. Plant in spring in average to fertile soil that drains well, adding organic matter like compost to enrich poor soil. In warmer zones, it is best to plant on a cool or cloudy spring day to help prevent transplant shock.
After planting, add a thick layer of organic compost around the plant to help retain water and reduce weeds. Delphiniums need average water, with a little extra moisture in peak heat or if grown in a container. The plants can benefit from some fertilizing, starting with a half-strength solution of balanced fertilizer about 3 to 4 weeks after planting. After that, fertilize regularly with lower strength fertilizer. Cut flower stalks back after blossoms fade and prune the plant to the ground when it begins to wilt in the fall.
Summer Nights Dwarf Delphinium Spacing
Summer Nights Dwarf Delphinium needs room for air to circulate and is best not crowded. In borders, edges and mass plantings, space the plants about 12 inches from center to center.
Summer Nights Dwarf Delphinium Information
| USDA Hardiness Zones: 3-7 |
| Plant Type: Perennial |
| Sunlight Exposure: Partial Sun to Full Sun |
| Mature Height: 10 - 12 Inches |
| Mature Width: 12 Inches |
| Plant Spacing: 12 Inches |
| Growth Habit: Upright |
| Flower Color(s): Blue |
| Flower Shade: Midnight Blue |
| Seasonal Interest: Early Summer Mid Summer Late Summer |
| Foliage Type: Herbaceous |
| Foliage Color(s): Green |
| Attracts: Butterflies, Hummingbirds |
| Resists: Deer, Rabbits |
| Features: Attracts Pollinators, Cut Flowers, Low Maintenance |
| Uses: Border Plant Container Cut Flower Edging Plant Mass Planting |
| Plant Brand: Proven Winners |
| Botanical/Scientific Name: Delphinium grandiflorum 'Summer Nights' |
- SKU:
- DELSN
Container Sizes
Please Note: The pictures below are to give a general representation of the different container sizes. The actual size/ages of plants are estimates and will vary based on; type of plant, time of year, last pruning & many other factors.
4.5" Pot
Also Know As:
4.5" Container
Plant Age:
~ 6 months
Plant Size:
~ 3"-6"
Pot Size:
~ 4.5"H x 3.75"W
Volume:
1.42 quarts
Quart Pot
Also Know As:
Quart
Plant Age:
~ 6 months - 1 year
Plant Size:
~ 4"-8"
Pot Size:
~ 4.75"H x 4.5"W
Volume:
1.50 quarts
2.5 Quart
Also Know As:
2.5 Quart Pot
Plant Age:
~ 1.5 - 2 years old
Plant Size:
~ 8"-12"
Pot Size:
~ 6.5"H x 6.5"W
Volume:
2.20-2.30 quarts
#1 Pot
Also Know As:
#1 Container
1 Gallon
Plant Age:
~ 1.5 - 2 years old
Plant Size:
~ 10"-14"
Pot Size:
~ 7"H x 7.75"W
Volume:
2.26-3.73 quarts
#2 Pot
Also Know As:
#2 Container
2 Gallon
Plant Age:
~ 1.5 - 3 years old
Plant Size:
~ 12"-18"
Pot Size:
~ 9.5"H x 9.5"W
Volume:
1.19-1.76 gallons
#3 Pot
Also Know As:
#3 Container
3 Gallon
Plant Age:
~ 2 - 4 years old
Plant Size:
~ 12"-30"
Pot Size:
~9.5"H x 11"W
Volume:
2.32-2.76 gallons
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Plant Addict Guarantee (Included On All Plant Orders)
Plant Addicts Warranty - 1 Year (Extra Purchase Required)
Guide: How to Care for Your New Plant(s)
Planter Shipping
Standard Colors: 2-3 business days
Special Order Colors: 8 weeks - this is due to the planter being custom made with the color(s) of your choice
Please Note: On special orders there can not be any cancellations
Plant Shipping
Time of Order:
Summer Shipping
- If there is extreme heat we’ll delay shipping.
- We’ll have to review what areas the plants are traveling through along with your location
Once your plant is shipped you’ll receive an email with tracking information. Depending on the above criteria we’ll ship your plant(s) towards beginning of the following week from your order. We put together this helpful guide of what to do when you receive your plants in the mail.
It is important to know that all of our plants are clearly labeled for which growing zones the plant can survive in. The plants are thoroughly trialed and tested in every growing zone before we state the plant can grow in a zone. Again, our #1 priority is to ship the plants to you healthy and ready to thrive in your location. So we will do everything in our power to do so.