Blue Boy Dahlia

A show-stopping lilac-blue semi-dinnerplate variety brings a unique color to the world of Dahlias. These well-formed flowers provide dramatic color in the border for many months from midsummer.
Zones8 - 10
Advantages
Easy To Grow
Attract Butterflies
Attract Hummingbirds
Good For Cut Flowers
Good For Containers
Extended Bloom Time (more than 4 weeks)
Light Requirements
Full Sun
Mature Plant Size36-40" tall
Bulb Spacing1 bulb / tuber per sq. ft.
Bloom TimeMid summer until frost
ShippingNo longer available this season. Learn More…
SizeBag of 3
SKUHC008699

USDA Hardiness Planting Zones

To determine if a plant is sufficiently cold hardy, the USDA created numbered zones indicating winter low temperatures; the lower the zone number the colder the winter.

  • If the coldest winter temperature expected in your area is -15°F (zone 5) then any plants rated zones 3-5 will survive the winter temperatures in your area.
  • If you live in very warm winter areas (zones 9-11) plants with zones 3-4 ratings are not recommended. The lack of freezing winter temperatures do not provide a time for winter dormancy (rest).

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Product is Out of Stock
Out of stock
SKU
HC008699
Details
36-40" tall. Dahlia Blue Boy is a show-stopping lilac-blue variety that brings a unique color to the world of Dahlias. These well-formed flowers provide dramatic color in flower beds and borders for many months from midsummer. Mix Blue Boy with shades of pink, purple or silver for an outstanding display, or use it to cool down warmer colored flowers. Cold hardy in zones 8-10. In colder zones lift the bulbs in fall and store in a cool place over the winter.
More Information
SKUHC008699
Common Name
Blue Boy Dahlia
Botanical Name
Dahlia Blue Boy
Item Package Size
Bag of 3
Flower Color
Blue, Purple
Flower Size
6-8" flowers
Light Requirements
Full Sun
Bloom Time
Mid summer until frost
Mature Height
36-40" tall
Bulb Spacing
1 bulb / tuber per sq. ft.
Planting Depth
Bulbs/Tubers should be planted 1" to 2" below the soil line.
Soil Type
Sandy Soil, Average Soil, Acidic Soil
Soil Moisture
Average
Ideal Region
Northeast, Southeast, Midwest, West, Southwest, Pacific Northwest
Advantages
Easy To Grow, Attract Butterflies, Attract Hummingbirds, Good For Cut Flowers, Good For Containers, Extended Bloom Time (more than 4 weeks)
Additional Information
Can be grown as annuals in zones 3-7. Hardy in zones 8–10.
Zones
8, 9, 10
Ships As
Bulb, Rhizome, Tuber
Item Unit Of Measure
Tuber
Poisonous or Toxic to Animals
Tubers and leaves are toxic if eaten in large amounts.
Planting Time
Spring / Summer
Ships To Canada
No
Planting Guides

Summer Blooming Bulbs, including popular varieties such as gladiolus and dahlias, are planted in the spring and bloom in the summer. Most of these bulbs are tropical and require warm weather to be planted. There must not be any danger of frost and your ground temperature must have reached 55 degrees Fahrenheit before planting. Many of our summer blooming bulbs can be planted as perennials in zones 9-10 (zone 8 if mulched), but should be treated as annuals in cooler climates. You can lift them and store them in the fall, or bring patio pots inside before frost. See page 15 of our Planting Guide for a bulb depth planting illustration. Read our article about How To Grow Dahlias.

Growing Dahlias: Plant Dahlia tubers after spring frosts in good garden soil with full sun. Dahlias must be protected from high winds, so we suggest you position them against a wall or be ready to stake them. Keep the plants well-watered and free of bugs, applying flower fertilizer as they grow. Your dahlias will be in full bloom by July or August, with the enormous flowers continuing to bloom until frost. As frost threatens, pull up the roots and trim off the stems. You can store the tubers in a cool dry place until the following spring.


View more Planting Guides, or download our complete Planting Guide for tips on caring for your plants when you receive your order, as well as planting instructions for Perennials, Spring-Planted Bulbs, Fall-Planted Bulbs, Cacti & Succulents, Xeric Plants and more.
Shipping

No longer available this season.

As soon as your order is placed you will receive a confirmation email. You will receive a second email the day your order ships telling you how it has been sent. Some perennials are shipped as potted plants, some as perennial roots packed in peat.  The ‘Plant Information’ section describes how that item will ship. All perennials and spring-planted bulbs are packaged to withstand shipping and are fully-guaranteed. Please open upon receipt and follow the instructions included.

Perennials and spring-planted bulbs are shipped at the proper planting time for your hardiness zone. Perennial and spring-planted bulb orders will arrive separately from seeds. If your order requires more than one shipment, there is no additional shipping charge. See our shipping information page for approximate ship dates and more detailed information. If you need express shipping or have any questions, please call Customer Service toll-free at (800) 925-9387 or contact us by email.

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