Delgenius™ Shelby Delphinium

Delphinium 'Delgenius Shelby'

$39⁹⁰

In Stock
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Plant Size

Premium #1 Container
$39.90

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Plant Sentry™

Plant Sentry is designed to protect both consumers and the nursery trade from invasive plant pests and diseases. Sites that display the Plant Sentry protection badge are protected from consumers buying and nurseries shipping material carrying invasive pests and diseases.

This proprietary eCommerce software prevents the shipment of a restricted plant to each state. The Plant Sentry system includes a shipment certification program. The Plant Sentry Compliance Officer works closely with NatureHills.com and each nursery or fulfillment center to ensure only compliant plants are sold to customers.

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Delivery and Shipping

Shipping

To obtain a more accurate shipment time-frame, simply enter your zip code in the “Find Your Growing Zone” box to the right. Our plants are grown all over the country and lead time on items may be different because of this. Once your order is placed, you will also receive the specific shipment time-frame information as part of your order confirmation. Once an item ships, you will receive shipment notification and tracking numbers, so you can follow along while your plant travels to your doorstep. We use FedEx, UPS, or USPS at our discretion.

Due to winter weather we have put a hold on shipping to the areas shown below in grey. You can still order now and we will ship the plant to you during an appropriate time for your zone.

*If you have found your zone already, it will be highlighted in the table below.

Standard Shipping Rates

At Nature Hills we handle, package and ship the products you order with the utmost care to ensure healthy delivery. Shipping and handling charges are calculated based on the tables below. Please note that some items include an additional handling surcharge, these will be noted on the item's product page.

From	To	S&H
$0	$19.99	$24.99
$20	$49.99	$29.99
$50	$69.99	$34.99
$70	$99.99	$39.99
$100	$129.99	$44.99
$130	$149.99	$48.99
$150	$150+	Approx 28%

Click here to see our full rates

Buying Options for Plants

Nature Hills sells a large variety of plants with several options available. Plants are offered in both potted containers and as dormant bare root without soil. Here is a helpful resource to understand your options as you create a beautiful landscape with help from Nature Hills.

Ever wonder what a larger plant will mean for your landscape? Container Sizes are really all about the age of the plant!

Seasonally, Nature Hills offers hand selected, high quality bare root trees, shrubs and perennials. Bare root plants are sold by height from the top of the root system to the top of the plant. Plants may be taller than the height minimums.

Popular sizes of select trees are 1 foot, 2 feet, 3 feet, etc.
Popular sizes of select bare root plants is 1 foot, 18 inches, etc.

Nature Hills Container Size by Volume

Keep in mind, specific varieties and different growing conditions can affect the rate at which plants grow. Variations in size may occur.

Young Plants to 18 Months
Size	Volume
2"x2"x3"	Ranges from	.18 to .21 dry quarts / .198 to .23 dry liters in volume
4.5" Container	Equal to	.65 dry quart / .72 dry liter in volume
Sprinter Pot	Equal to	.63 dry quart / .69 dry liter in volume
4" Container	Ranges from	.31 to .87 / .35 to .96 dry liter in volume
6" Container	Equal to	1.4 dry quarts / 1.59 dry liters in volume
1 Quart	Equal to	1 dry quart / 1.1 dry liter in volume
5.5" Container	Equal to	1.89 of a dry quart / 2.08 dry liters in volume
4"x4"x5"	Ranges from	.8 to 1.1 dry quarts / .88 to 1.2 dry liters in volume
4"x4"x6"	Ranges from	1.0 to 1.3 dry quarts / 1.1 to 1.41 dry liters in volume
4"x4"x9"	Ranges from	1.1 to 2.1 dry quarts / 1.2 to 2.3 dry liters in volume
4"x4"x10"	Ranges from	1.7 to 2.3 dry quart / 1.87 to 2.53 dry liters in volume

Plants 18 Months - 2.5 Years Old
Size	Volume
2 Quart	Equal to	2 dry quarts / 2.2 dry liters in volume
#1 Container	Ranges from	2.26 to 3.73 dry quarts / 2.49 to 4.11 dry liters in volume
5"x5"x12"	Equal to	3.5 to 4.3 dry quarts / 3.85 to 4.74 dry liters in volume

Plants 2 - 4 Years Old
Size	Volume
#2 Container	Ranges from	1.19 to 1.76 dry gallons / 5.24 to 7.75 dry liters in volume
#3 Container	Ranges from	2.32 to 2.76 dry gallons / 10.22 to 12.16 dry liters in volume

Plants 3 - 5 Years Old
Size	Volume
#5 Container	Ranges from	2.92 to 4.62 dry gallons / 12.86 to 20.35 dry liters in volume
#6 Container	Ranges from	5.25 to 6.01 dry gallons / 23.12 to 26.42 dry liters in volume
#7 Container	Ranges from	5.98 to 6.08 dry gallons / 26.34 to 26.78 dry liters in volume

Plant Highlights

Delgenius™ Shelby Delphinium highlights at a glance!

Brand

Plants That Work
Botanical Name

Delphinium 'Delgenius Shelby'
Growing Zones

3 - 9
Mature Height

20 - 24 Inches
Mature Spread

16 - 20 Inches
Sun Exposure

Full Sun
Moisture

Medium
Soil

Well Drained Soil
Growth Rate

Medium
Flower Color

Blue, Purple
Pollinator Friendly

Yes
Pruning Time

Late Autumn
Bloom Period

Late Spring, Summer

Growing Zones

Find Your Growing Zone!

Proven Winners® Delgenius™ Shelby Delphinium

Gorgeous packed spires, the Delgenius™ Shelby Delphinium PP#34657 (Delphinium 'Delgenius Shelby') is a spectacular reblooming perennial known for its brilliant deep blue blooms with full, densely packed flower spikes. Rising high on tall sturdy stems over a mound of lacy deeply incised green foliage, these are eye-catching blossoms!

A standout in the Delgenius™ series, Shelby combines superior branching, heat tolerance, and cold hardiness, making it an excellent choice for gardens across many climates. Unlike traditional Delphiniums, Shelby offers continuous blooms from early summer to fall with a compact, sturdy form that requires no staking.

>>Jump to Planting & Care Instructions

Key Features of Delgenius™ Shelby Delphinium

Stunning deep blue blooms on tall, full flower spikes.
Extended bloom season, reblooming from early summer to fall.
Superior branching habit for maximum flower production.
Compact and sturdy, reaching 24-30 inches tall with no need for staking.
Cold hardy to USDA growing zones 3-9, are heat tolerant and widely adaptable.
Pollinator-friendly, attracting butterflies and bees.
Perfect for cut flowers with long-lasting blooms.
Deer and rabbit resistant for worry-free planting.

How to Use Delgenius™ Shelby Delphinium in the Landscape

Cottage Gardens & Perennial Borders

Plant Shelby in mixed borders to add vertical interest and bold color.
Combine with Roses, Coneflowers, or Coreopsis for colorful Cottage Gardens.
Use in mass plantings for a striking visual impact throughout the growing season.

Pollinator Gardens

Attract butterflies and bees with Shelby's nectar-rich blooms.
Include it in pollinator-friendly landscapes for season-long beauty and ecological benefits.

Container Gardening & Patio Displays

Shelby's compact habit makes it perfect for large containers.
Place on patios or decks to enjoy its vibrant blooms up close.

Cut Flower Gardens

Its tall, sturdy stems make it an ideal addition to fresh bouquets.
Cut back after the first bloom to encourage additional flowers for later in the season.

Delphinium Care & Maintenance

Delphinium are very easy to grow and hardy perennial plants!

Sun & Soil Requirements

Grows best in full sun to partial shade. Ensure at least 6 hours of direct sunlight for optimal blooms. Hot climates will find their plants do better with afternoon shade.
Prefers an enriched, well-drained soil with consistent moisture.

Watering & Mulching

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

Fertilizing

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

Pruning & Deadheading

Deadhead spent blooms to encourage reblooming.
After the first flush of flowers, cut back the flower stalks to promote a second bloom cycle.

Winter Care: Shelby is cold hardy! Apply mulch or compost over the area in late fall to protect the root zone during harsh winters.

Order Delgenius™ Shelby Delphinium Today!

Bring vivid color and vertical beauty to your garden with Delgenius™ Shelby Delphinium. With its extended bloom season, compact habit, and reliable performance, Shelby is a must-have for any perennial garden.

Order now from Nature Hills Online Plant Nursery, and enjoy months of stunning blooms and low-maintenance beauty in your landscape!

Frequently Asked Questions About Delgenius™ Shelby Delphinium

How tall does Delgenius™ Shelby Delphinium grow?

Shelby grows to 20-24 inches tall and spreads to about 16-20 inches wide, making it easy to include in mixed borders, mass plantings, and containers.

When does Delgenius™ Shelby Delphinium bloom?

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

Is Delgenius™ Shelby Delphinium deer-resistant?

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

Can I grow Shelby in a container?

Absolutely! Shelby's compact, sturdy form makes it perfect for patio pots and large containers.

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 later in the season.

Is Delgenius™ Shelby Delphinium easy to grow?

Yes! Shelby is widely adaptable, low-maintenance, and more heat-tolerant than traditional Delphiniums.

Why Order From Nature Hills Nursery?

Nature Hills Nursery is committed to bringing the highest-quality plants to your door. Join thousands of happy customers and get all your planting needs at Nature Hills! We guarantee our plants for their first year! Check out lifelong support and landscaping ideas in our #ProPlantTips Garden Blog and online at customer-support.naturehills.com!