Dahlia Blue Boy
Details36-40" 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.
|Common Name||Dahlia Blue Boy|
|Botanical Name||Dahlia Blue Boy|
|Zones||8, 9, 10|
|Ships As||Bulb, Rhizome, Tuber|
|Light Requirements||Full Sun|
|Flower Color||Blue, Purple|
|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.|
|Bloom Time||Mid summer until frost|
|Planting Time||Spring / Summer|
|Soil Type||Sandy Soil, Average Soil, Acidic Soil|
|Advantages||Attract Butterflies, Attract Hummingbirds, Easy to grow, 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.|
|Poisonous||Tubers and leaves are toxic if eaten in large amounts.|
|Ships to Hawaii, Alaska & Canada||No|
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.
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.
Plant Shipping: Buy now and we will ship your order at the ideal planting time for your region. Spring-Planted Perennial and Bulb orders will ship from February 27-June 30, warmest zones first. Most plant orders will arrive within 3-4 days, or less, of leaving our greenhouses. This prompt delivery is provided without additional express charges.
Grass Plugs Will ship at planting time in spring 2017, beginning in late February.
Wildflower Seed & Grass Seed Orders ship within 2-3 days.
Standard shipping costs are $4.99 and up, depending on the size of the order.
Make Fast Even Faster: For ‘Rush’ same week delivery, please call customer service at 800-925-9387.
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- Never came up, planted correctly, though
Comments about High Country Gardens Dahlia Blue Boy:
These were planted according to your planting directions. Alas, they never even broke through the soil. I was really looking forward to the color, as I plantes them in a corner garden that has all kinds of blues and purples.
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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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