- 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 Known 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 Known 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 Known As:
2.5 Quart Pot
Plant Age:
~ 1 - 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 Known As:
#1 Container
1 Gallon
Plant Age:
~ 1 - 2 years old
Plant Size:
~ 10"-14"
Pot Size:
~ 7"H x 7.75"W
Volume:
2.26-3.73 quarts
#2 Pot
Also Known 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 Known 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
For more detailed information, please click here.
Plant Addicts Guarantee (Included On All Plant Orders)
Plant Addicts always guarantees your plant(s) will arrive happy & healthy. However, plant(s) are being shipped through the mail & sometimes accidents happen. If the plant is dead, has dried out roots or the incorrect item was shipped, just notify Plant Addicts within 3 days upon delivery. We may ask for pictures but will try to make it as easy as possible for you. Please note, plant(s) with damaged branches or wilted leaves will not qualify for this guarantee. Plants are very resilient and will rebound quickly when cared for correctly.
For more information on how to care for your new plants, please click on our guide below.
Guide: How to Care for Your New Plant(s)
Plant Addicts Warranty - 1 Year (Extra Purchase Required)
We encourage all plant lovers to purchase the Plant Addicts Warranty, whether you're a new gardener or an expert. There are many variables outside of anyone's control that can cause a plant to die. Hungry animals, drought, poor soil conditions, over watering, diseases & pests are all good examples of what can cause plants to die. The Plant Addicts Warranty is a 1 year warranty protecting you from all of the unknowns and will replace your plant if something were to happen to it.
The warranty is purchased on a per plant basis and must be purchased at the same time as the plant(s). We will cover 100% of the price of the plant, but the warranty does not cover shipping costs. SImply let us know if your plant has died within 1 year of receiving it and we will get you a new one shipped out as soon as possible (depending on the time of the year and availability). We may ask for photos for documentation purposes, but we try to make the process as easy as possible.
For more information, please click on our page below.
Plant Shipping
Below are some factors we consider when determining when to ship the plants depending on the timing of the order.
Winter to Early Spring
We ship only when it's warm enough to plant in your growing zone.
Sometimes plants aren't completely ready to sell and ship in early spring. We will wait until the plants are ready before shipping so you don't get a subpar product.
For Southern plants we will be able to ship much earlier than plants coming from our northern nursery.
Summer
If there is extreme heat we may delay shipping for a week or several weeks.
We review what areas the plants are traveling through as well as your location.
Fall into Winter
We’ll ship plants out all the way up to the end of the fall planting season!
Winter
Get your order in early to reserve your plants for Spring planting!
Once your plant is shipped you’ll receive an automated email with tracking information.
Click here for more detailed shipping information.
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