Delgenius™ Kingsley Delphinium

Delphinium x 'Kingsley' PP34,675

Plants that Work®

Compact Delphinium Height Perfect for Borders, Reaching Just 24-30 Inches Tall
Cold Hardy: Thrives in Zones 3-9
Grows 1-2 ft Tall and Wide
Showy Purple Blooms From Late Spring to Late Summer
Deer Resistant, Drought Tolerant, Rabbit Resistant

$38⁹³

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Plant Size

Product variants

Planting & Care

Where to Plant

Sunlight: This Delphinium performs best in full sun, requiring at least 6 to 8 hours of direct light daily. While it can handle some afternoon shade in hotter climates, too much shade results in floppy stems and fewer of those signature electric blue flowers.
Soil: Aim for rich, loamy soil that holds moisture but breathes well. If you have heavy clay, mix in organic compost to improve drainage, or use a raised bed to prevent "wet feet" which can lead to crown rot.

Watering Requirements

During the first growing season, water your Delphinium twice a week to keep the soil consistently moist like a wrung out sponge. Once established, the Delgenius™ series is more resilient, but you should still provide deep soakings during dry spells to prevent the flower spikes from wilting or shortening. Inconsistent watering often leads to mildew issues or stunted growth, so a layer of mulch around the base is helpful to maintain steady hydration levels.

Pruning Tips

These plants bloom on new wood, so you should cut the main flower spikes back to the foliage as soon as the first round of blooms fades in early summer. This "haircut" encourages the plant to send up a second flush of flowers for the autumn. In late fall after a hard frost, cut the entire plant down to two inches above the ground to keep the garden tidy and prevent pests from overwintering in the old stalks.

Fertilizer Needs

Apply a balanced, slow release fertilizer, such as a 10-10-10 formula, in early spring just as new growth emerges. Avoid using high nitrogen fertilizers late in the summer because this forces soft, sappy growth that is easily damaged by the first frost. Feeding your Delphinium provides the energy it needs to support those massive, heavy flower towers throughout the season.

Delivery and Shipping

Shipping Rates

Ships in 7-10 business days • Tracking provided • Weather protected

Under $50	$9.99
$50 - $99.99	$14.99
$100 - $149.99	$16.99
$150 - $198.99	$24.99
$199+	FREE

✓ Zone-specific timing • ✓ Professional packaging • ✓ Health guarantee

Understanding Our Container Sizes

At Nature Hills, our plants are sold in industry-standard nursery containers. You will notice we use the word "container" rather than "gallon." Container numbers follow a nursery trade size standard, not liquid volume. The number tells you the plant's size category and general maturity level. A larger container means a more established plant with a stronger root system.

Container Sizes

Quart

Plant age: 6 months to 1 year
Best for: Ground covers, perennials, ornamental grasses
What to expect: Our smallest and most affordable size. Well-suited for planting in multiples across a large area. Allow 1 to 2 seasons for full establishment.

#1 Container

Plant age: 1 to 2 years
Best for: Shrubs, perennials, smaller trees
What to expect: About the size of a large coffee can. A well-developed root system in a manageable size. Good value choice when you have time to let the plant grow into the space over a season or two.

#2 Container

Plant age: 2 to 3 years
Best for: Shrubs and trees where you want faster establishment
What to expect: A noticeable step up from a #1 in both plant size and root development. Good choice when you want visible presence without going to a larger size.

#3 Container

Plant age: 3 to 4 years
Best for: Most plants, most situations — flowering trees, shade trees, evergreen shrubs
What to expect: Our most popular size. Strong, developed root system. Plants in a #3 container make an immediate visual impact from day one. If you want a head start rather than waiting seasons for a plant to fill in, this is typically the right choice.

#5 Container and Larger

Plant age: 4 to 5+ years
Best for: Specimen plants, privacy screens, maximum instant impact
What to expect: Large, mature plants ready to make an immediate statement in your landscape. We also carry #7 and larger sizes for select varieties.

Why "Container" and Not "Gallon"?

Nursery container sizes follow an industry trade standard established for the nursery and horticulture industry. The number is a size designation, not a measurement of liquid volume. Actual soil volume varies by plant type, root mass, and growing medium. Using "container" is the accurate industry term. When you see #1, #2, or #3, think of it as the plant's size tier, not a gallon measurement.

Root Pouch Containers

Some Nature Hills plants arrive in a Root Pouch, a breathable fabric container made from 100% recycled materials. Root Pouches encourage denser root development through air pruning, which discourages root circling and promotes a stronger, more fibrous root ball at the time of planting.

Plants growing in Root Pouch fabric containers, showing the breathable woven fabric construction

There are two types. Knowing which one you have changes how you plant:

Degradable (brown or tan fabric): Plant the entire pouch directly in the ground. The fabric breaks down naturally in the soil over time.
Non-degradable (black or gray fabric): Remove the pouch before planting. Cut the bottom open with scissors, then peel the sides away. The fibrous root ball will hold its shape.

Not sure which type you have? Check the tag on your plant or contact us and we will confirm.

Full Root Pouch planting guide

Choosing the Right Size

Size	Plant Age	Best For
Quart	6 mo to 1 yr	Ground covers, perennials, grasses. Budget-friendly for mass plantings.
#1 Container	1 to 2 yrs	Shrubs, perennials, small trees. Value choice for patient gardeners.
#2 Container	2 to 3 yrs	Shrubs and trees where you want faster establishment.
#3 Container	3 to 4 yrs	Most plants. Immediate visual impact. Our most popular size.
#5 and larger	4+ yrs	Specimen plants, privacy screens, maximum instant impact.

Still not sure which size is right for your project? Our plant specialists are happy to help. Contact us and we will point you in the right direction.

Plant specifications
Plant Characteristics	Cold hardy, Flowering, Reblooming, Deer-resistant, Attracts pollinators, Container Friendly, Non-invasive
Hardiness Zone	3a, 3b, 4a, 4b, 5a, 5b, 6a, 6b, 7a, 7b, 8a, 8b, 9a, 9b
Sunlight	Full sun
Height	1-2 ft
Width	1-2 ft
Watering Needs	Moderate
Preferred Soil	Peaty
Growth Rate	Moderate
Growth Habit	Upright
Blooms In	Spring, Summer
Flower Color	Purple
Foliage Color	Green
Pet Safety	Toxic to pets
Suitable Space	Outdoors
Botanical Name	Delphinium x 'Kingsley' PP34,675
Species	x
Cultivar	Kingsley
Class	Ranunculales
Does Not Ship To	AK, HI, ID, MT, PR

Proven Winners® Delgenius™ Kingsley Delphinium

The Delgenius™ Kingsley Delphinium PP#34657 (Delphinium 'Delgenius Kingsley') is a spectacular perennial known for its massive spikes of soft lavender-blue blooms and reliable reblooming performance. Bred for both beauty and durability, this prolific bloomer stands out with its large, densely packed flowers that continue blooming from early summer through fall.

Backed by a frilly mound of deeply lobed leaves, the strong flowering stalks rise tall! Unlike traditional Delphiniums, Kingsley combines cold hardiness, heat tolerance, and exceptional branching, making it a gardener's dream for long-lasting color in borders, cottage gardens, and pollinator-friendly spaces.

Key Features of Delgenius™ Kingsley Delphinium

Gorgeous lavender-blue double blooms with full, densely packed flower spikes.
Extra-long bloom period from early summer through fall.
Highly branched habit for maximum flower production.
Cold hardy and heat tolerant, making it more adaptable than traditional Delphiniums.
Compact and sturdy, no staking required.
Attracts butterflies and pollinators but is resistant to deer and rabbits.
Grows up to 2 feet tall with a spread of 16-20 inches, perfect for small or large gardens.
Great for cut flower arrangements with long-lasting blooms.
Part of the Delgenius™ series, known for superior branching and reblooming ability.

How to Use Delgenius™ Kingsley Delphinium in the Landscape

Cottage Gardens & Mixed Borders

Plant Delgenius™ Kingsley in mixed perennial borders to create vertical interest and texture.
Pair with Roses, Daisies, and Salvia for a classic cottage garden look.
Use in mass plantings for a bold, colorful display throughout the growing season.

Pollinator-Friendly Gardens

Attract butterflies and bees with Kingsley's nectar-rich blooms.
Include in pollinator gardens as a mid-height anchor plant.

Containers & Patio Gardens

Its compact growth habit makes it ideal for large containers.
Place on patios and decks for up-close enjoyment of the blooms.

Cut Flower Gardens

Kingsley's tall, sturdy flower spikes are perfect for fresh bouquets.
Cut back after the first bloom to encourage additional flowering.

Delphinium Care & Maintenance

Delphinium are very easy to grow and hardy perennial plants!

Sun & Soil Requirements

Full sun to partial shade—plants bloom best with at least 6 hours of sunlight a day.
Prefers a rich, well-drained soil with consistent moisture.

Watering & Mulching

Keep soil evenly moist, especially during hot, dry periods.
Apply a 3-4 inch layer of mulch around the base to retain moisture and regulate temperature.

Fertilizing

Feed with a balanced, slow-release fertilizer in early spring and again after the first bloom to encourage continuous flowering.

Pruning & Deadheading

Deadhead spent blooms to promote reblooming.
After the first flush, cut back flower stalks to encourage a second bloom later in the season.

Winter Care

Delgenius™ Kingsley is a cold hardy perennial!
Apply mulch in late fall to protect the root zone during harsh winters.

Order Delgenius™ Kingsley Delphinium Today!

Bring continuous color and vertical beauty to your garden with the Proven Winners® Delgenius™ Kingsley Delphinium. Its long bloom season, compact habit, and superior adaptability make it a must-have perennial for any landscape.

Order now from Nature Hills Online Plant Nursery, and enjoy season-long blooms and reliable performance in your garden for years to come!

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Frequently Asked Questions

How tall does Delgenius™ Kingsley Delphinium grow?

Kingsley grows around 2 feet tall and wide, making it perfect for back and mid-border accents.

When does Delgenius™ Kingsley bloom?

It blooms from early summer through fall, with a second bloom cycle after deadheading.

Is Delgenius™ Kingsley deer-resistant?

Yes! Delgenius™ Kingsley is resistant to deer and rabbits, making it a great choice for gardens with wildlife pressure.

Can Delgenius™ Kingsley be grown in containers?

Absolutely! Its compact habit and sturdy stems make it ideal for large containers on patios and decks.

How do I promote continuous blooming?

Deadhead spent blooms and cut back flower stalks after the first bloom to encourage a second flush of flowers.

Deadhead spent blooms and cut back flower stalks

after the first bloom to encourage a second flush of flowers.

Is Delgenius™ Kingsley drought-tolerant?

While it prefers consistent moisture, it is more heat and drought-tolerant than traditional Delphiniums once established.

Delgenius™ Kingsley Delphinium

Delphinium x 'Kingsley' PP34,675