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Summer Nights Dwarf Delphinium

$29.99
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$29.99
  • 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'

Click here for more information on plant container sizes.

Plant Addict Guarantee (Included On All Plant Orders)

Plant Addicts guarantees your plant(s) will arrive happy and healthy, but the plant(s) are being shipped through the mail and 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 information on how to care for you new plant please check out our guide. 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 new or an expert. There are many variables outside our control and yours that can cause the demise of your plant(s). Examples would be hungry animals, drought, poor soil conditions, over watering, disease, insects & many other factors. The Plant Addicts Warranty is a 1 year warranty protecting you from all the unknowns and will replace your plant if it moves on to the plant afterlife.

The warranty is purchased on a per plant basis and must be purchased at the same time as the plant purchase. We will cover 100% of the price of the plant but the warranty does not cover shipping cost. Simply let us know if your plant has died within one year of receiving it and we’ll get you a new one shipped out. We may ask for photos for documentation purposes but again we’ll try to make it as easy as possible.

For more information, please go to our Shipping & Returns page at the bottom of the website.

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.