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  • Check Back in October for Advance Sale on Spring-Planted Bulbs

Semi-Dinnerplate Dahlia Blue Boy

This show-stopping variety brings a completely unique color scheme to Dahlias with magnificent, purple-blue flowers. Plant Blue Boy to "cool down" a bed filled with reds and yellows.

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Details:

Height: 36-40" tall
Bulb Spacing: 1 bulb / tuber per sq. ft.
Bloom Time: Mid summer until frost
Zones: 2, 3, 4, 5, 6, 7, 8, 9, 10
Shipping: Shipping begins in late March based on ground temperatures, warmest zones first.

Click Here for more details, product description, reviews, how-to guides and shipping information.

 

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Details
SKU 39DAHL3
Common Name Decorative Semi-Dinnerplate Dahlia
Botanical Name Dahlia
Zones 2, 3, 4, 5, 6, 7, 8, 9, 10
Ships As Bulb, Rhizome, Tuber
Light Requirements Full Sun
Flower Color Blue
Estimated 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
Plant Type/Life Cycle Annual
Planting Season Spring, Summer
Will Tolerate Sandy Soil, Loamy Soil, Acidic Soil
Soil Moisture Average, Well Draining
Suggested Uses Hummingbirds & Butterflies, Containers, Cut Flowers, Borders, Showy Flowers, Extended Blooms, Easy to Grow
Additional Information Hardy in zones 8-10
Ships to Canada No
Our Master Gardeners Suggest Pairing With:
  • Asiatic Lily Bulbs Gironde

    Asiatic Lily Bulbs Gironde

  • Garden Gloves

    Garden Gloves

  • All Annual Wildflower Seed Mix

    All Annual Wildflower Seed Mix

Description
Blue Boy proves once more that there's no end to what hybridizers can do with Dahlias – Imagine these gorgeous flowers in a vase!

Why Gardeners love Dahlias: Dahlias are one of the most rewarding summer flowers of all. They're really easy to grow with spectacular results. If you know them, you know all about it. If you don't, here is the information you need. Prepare to become 'hooked.' First of all, Dahlias are great for cutting, as you can see in the large top photo of an arrangement showing a lavish deep red dahlia right next to a large, voluptuous rose. Dahlias are native to Mexico, but there's about as much resemblance between the original and the Dutch hybrids as there is between an old toy car and a brand new Mercedes. Dahlias for today's gardeners offer a really big gardening treat. The 'bulbs' are actually tubers, and look a lot like peony roots--sort of like a bunch of carrots. The plants grow quickly and some grow quite tall, always with lush deep green foliage.

Types of Dahlias: These plants have been hybridized into various heights from short bedding plants to tall bushy ones. But they are officially categorized by flower type or shape. The term, 'Dinnerplate Dahlia' is probably the most famous description, and though all gardeners use the term, it is not an official classification. 'Dinnerplates' are, simply put, the large plants with the huge flowers. The always-double flowers are up to 8', sometimes a whopping 10' across, so the name makes sense. Here are the official classifications:

'Decorative Dahlias' This group includes the Dinnerplates and also other taller (to 4 ft.) plants with double, chrysanthemum-like flowers. The famous 'Shogun Dahlias' are as tall as Decoratives, but have very heavy bloom of smaller bi-colored flowers for gardeners who want a large bushy plant covered with color.

Growing Dahlias: All the gardener needs to do is plant the tubers after spring frosts in good garden soil with full sun. It's best to position them against a wall or be ready to stake them, since they are brittle, and must be protected from high winds. (If you've grown perennial Delphiniums, the plant size and growth is similar, but success with Dahlias is much easier.) Keep them free of bugs, well-watered, and well-fertilized as they grow, and your dahlias will begin to set buds by midsummer and be in full bloom, usually during July or August. Then the huge flowers keep coming until frost. When frost threatens, just pull the roots up, cut off the stems, and store the tubers until the following spring. Each fall, you'll be amazed how the 'bulbs' have multiplied during the summer, giving you more and more to divide and enjoy the next year.

One expert has said, 'Never have so many gardeners received so much for so little work, as when they grow dahlias.''

Our Master Gardeners Suggest Pairing With:
  • Asiatic Lily Bulbs Gironde

    Asiatic Lily Bulbs Gironde

  • Garden Gloves

    Garden Gloves

  • All Annual Wildflower Seed Mix

    All Annual Wildflower Seed Mix

Reviews

REVIEW SNAPSHOT®

by PowerReviews
 
3.3

(based on 7 reviews)

Ratings Distribution

  • 5 Stars

     

    (2)

  • 4 Stars

     

    (2)

  • 3 Stars

     

    (1)

  • 2 Stars

     

    (0)

  • 1 Stars

     

    (2)

57%

of respondents would recommend this to a friend.

Reviewed by 7 customers

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Displaying reviews 1-7

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(1 of 1 customers found this review helpful)

 
5.0

Abundance of eye catching flowers

By mbabbitt

from Bothell, WA

Verified Reviewer

Pros

    Cons

      Best Uses

        One of my favorites. Not exactly blue, more of a lavendar. but definitely closer to the blue side of the color spectrum. I grow in containers and it has many, many blooms and works well in a bouquet.

        • Was this a gift?:
        • No

        (3 of 3 customers found this review helpful)

         
        5.0

        FANTASTIC!

        By Virginia Lady

        from Blacksburg, VA

        Verified Reviewer

        This flower is gorgeous! It has long stems and my latest flowers have been 7.5" in diameter. This is the second year for this one. I thought the bulb looked to be in poor condition when I unpacked it in the spring, but I planted it any way. What a beautiful reward I received. It should have been named "Lavender Boy" because it certainly is not blue.

        (3 of 3 customers found this review helpful)

         
        4.0

        great grower

        By Andy

        from Northern NJ

        Verified Reviewer

        Flower is a great grower. The plant got much larger than than i had expected. It has a very long bloom time and great color.

        (1 of 1 customers found this review helpful)

         
        3.0

        Large & Pretty

        By Dreamweava

        from N. Kingstown RI

        Verified Reviewer

        Flowers large & darker than expected but still very pretty however out of 6 bulbs only 2 bloomed-disappointing & therefore cant recommend

         
        1.0

        dead dahlia

        By mag

        from Smyrna, TN

        Verified Reviewer

        My Dahlia purchase grew about one foot and then died. The white Dahlias I purchased are excellent and are huge.

         
        1.0

        No show

        By disappointed gardener

        from Russellville, AR

        Pros

          Cons

          • Not a grower

          Best Uses

            this plant never even sprouted, it was planted same time as other dahlia's that grew but this one didn't. it's a shame was looking forward to seeing in full bloom

            (3 of 3 customers found this review helpful)

             
            4.0

            Blue Boy Dahlia

            By Anna

            from Providence, RI

            About Me Avid Gardener

            Verified Reviewer

            Pros

            • Long Bloom Time
            • Low Maintenance
            • Pest Resistant
            • Reliable Growth

            Cons

            • Colors Not As Expected

            Best Uses

              The color of the flowers is much deeper purple than was on the picture. Other than that it's a pretty dahlia.

              Displaying reviews 1-7

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              1
              How-To Guides
              Our Master Gardeners Suggest Pairing With:
              • Asiatic Lily Bulbs Gironde

                Asiatic Lily Bulbs Gironde

              • Garden Gloves

                Garden Gloves

              • All Annual Wildflower Seed Mix

                All Annual Wildflower Seed Mix

              Shipping

              Shipping begins in late March based on ground temperatures, warmest zones first.

              View Shipping Rate Chart

              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 ‘Details’ tab 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 (877) 309-7333 or Contact Us by email.

              Our Master Gardeners Suggest Pairing With:
              • Asiatic Lily Bulbs Gironde

                Asiatic Lily Bulbs Gironde

              • Garden Gloves

                Garden Gloves

              • All Annual Wildflower Seed Mix

                All Annual Wildflower Seed Mix

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