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USDA Plant Hardiness Zones

To help gardeners understand which plants will grow well for them, the entire USA has been segmented into ‘Plant Hardiness Zones’. Knowing your zone number is helpful when shopping for plants because:

  • Cold-area gardeners can avoid buying plants that simply won’t survive their lowest winter temperatures.
  • Warm-area gardeners can steer clear of plants that need a period of cold weather in order to bloom again.
Find your Plant Hardiness Zone here.

Sea Holly Blue Star

 

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Sea Star’s lacy, deep-blue flowers steal the show both in the garden and cut for fresh and dried bouquets. (Erynigium alpinum)

Zones 4 - 7
Advantages
Bee Friendly
Bee Friendly
Cut Flowers
Cut Flowers
Dried Flowers
Dried Flowers
Light Requirements
Full Sun
Full Sun
Mature Plant Size 28-32" tall, 12-24" wide
Bloom Time Mid summer
Size Bag of 3
SKU 225PER3

Plant Information

Here's a fascinating plant, new to us this year. But hardly new. Most Sea Hollies grow along the Mediterranean coast as striking blue wildflowers, and they have been admired for centures. Even Plutarch wrote about this plant in ancient Rome! One of the species also grows in the Alps, and that one is Erynigium alpinum, or Alpine Sea Holly. Our selection is from that species, and said to be one of the bluest of them all.

The great British gardener of the Edwardian period, William Robinson, the first plant expert who was seriously interested in wildflowers, said Sea Holly was his all-time favorite. Stunned by the blue coloring, rare in flowers, he wrote that Sea Holly was not surpassed in beauty by any plant! Quite an endorsement.

For good growth, Sea Holly requires full sun and a gritty, fast-draining soil, so site yours carefully. The flowers arise in mid-summer from plants about 30 tall, and by the way, both the leaves and roots are edible.

SKU 225PER3
Common Name Sea Holly
Botanical Name Eryngium alpinum
Zones 4, 5, 6, 7
Light Requirements Full Sun
Flower Color Blue
Mature Height 28-32" tall
Estimated Mature Spread 12-24" wide
Bloom Time Mid summer
Planting Depth Plant so that the top of the root is 1" below the soil line.
Ships As Bare Root
Planting Time Spring / Summer
Soil Type Loamy Soil, Drought/Dry Soil
Soil Moisture Dry, Average, Well Draining
Advantages Bee Friendly, Cut Flowers, Dried Flowers
Ships to Hawaii, Alaska & Canada No

Shipping

Now shipping all orders within 5 business days.

As soon as your order is placed you will receive an order confirmation email that will include your shipping information. We ship perennials and spring-planted bulbs at the proper planting time for your hardiness zone. Perennials 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.

You will receive a second email the day your order ships telling you how it has been sent. Your order is scheduled to arrive at your door, fresh and ready to plant, usually within 3-5 days of leaving our warehouse, depending on your shipping address. We pack our plants to withstand up to 10 days in transit, in the event transit is delayed. We cannot guarantee arrival on a specific day. Please make sure to open your package upon receipt and follow the instructions included.

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Reviewsby PowerReviews

REVIEW SNAPSHOT®

by PowerReviews
American MeadowsSea Holly Blue Star
 
2.1

(based on 11 reviews)

Ratings Distribution

  • 5 Stars

     

    (1)

  • 4 Stars

     

    (1)

  • 3 Stars

     

    (2)

  • 2 Stars

     

    (1)

  • 1 Stars

     

    (6)

20%

of respondents would recommend this to a friend.

Pros

No Pros

Cons

No Cons

Best Uses

  • Garden (4)
    • Reviewer Profile:
    • Avid gardener (9)
    • Primary use:
    • Personal (9)

Most Liked Positive Review

 

I was being hopeful

I ordered these with the hope that they would do well here. The bare roots came in great shape, and tried their best to thrive. In the end our heat and humidity, baked...Read complete review

I ordered these with the hope that they would do well here. The bare roots came in great shape, and tried their best to thrive. In the end our heat and humidity, baked and steamed them to death.

VS

Most Liked Negative Review

 

Didn't Grow For Me!

This plant has beautiful color and presence, but did not grow well for me! One of the three that I purchased did not come up at all, and the other two started out...Read complete review

This plant has beautiful color and presence, but did not grow well for me! One of the three that I purchased did not come up at all, and the other two started out like they would be ok and then died back! My garden looks amazing this year, but these particular plants did not do well at all, darn!

Reviewed by 11 customers

Displaying reviews 1-11

Back to top

 
1.0

Just a lot of leaves

By 

from Franklinton, Louisiana

About Me Avid Gardener

Verified Reviewer

Pros

  • Accurate Instructions

Cons

    Best Uses

      Comments about American Meadows Sea Holly Blue Star:

      I've had my plants for 2 years. All I ever get is low to the ground leaves, no stem or flowers. Any suggestions?

      • Primary use:
      • Personal
       
      3.0

      Disappointed, did not produce

      By 

      from Wisconsin

      About Me Avid Gardener

      See all my reviews

      Verified Buyer

      Pros

        Cons

        • did not grow

        Best Uses

        • Garden

        Comments about American Meadows Sea Holly Blue Star:

        I was really looking forward to seeing this plant grow and flower. I like to try different looking flowers in my gardens and had never see this plant before. Sadly they did not come up at all. I will say, the customer service was stellar and the situation resolved expediticiously!!! (reason for 3 stars)

        • Primary use:
        • Personal
         
        1.0

        perished

        By 

        from Bay Area, CA

        About Me Avid Gardener

        See all my reviews

        Verified Buyer

        Comments about American Meadows Sea Holly Blue Star:

        Received as bareroot and it did not take off even when planted as instructed. Very disappointed

        (0 of 1 customers found this review helpful)

         
        1.0

        Waste of time and money, they don't come up

        By 

        from Sheboygan,Wis

        About Me Avid Gardener

        Pros

        • None

        Cons

        • Difficult To Grow

        Best Uses

          Comments about American Meadows Sea Holly Blue Star:

          This is the 5th time I have tried to grow them over the years with little success each time.I got 2 sets from you this year, again they don't come up.

          • Primary use:
          • Personal

          (1 of 2 customers found this review helpful)

           
          1.0

          Baked before they coud rise!

          By 

          from St. George, Utah

          About Me Avid Gardener

          Verified Reviewer

          Comments about American Meadows Sea Holly Blue Star:

          I got nothing but a few sad leaves this year before the temps went to baking them. Hoping they will do better next year.

          • Primary use:
          • Personal

          (2 of 3 customers found this review helpful)

           
          1.0

          I'd be hesitant about ordering this again, but I might!

          By 

          from Harrison, OH

          About Me Avid Gardener

          Verified Reviewer

          Comments about American Meadows Sea Holly Blue Star:

          I've ordered this flower twice; 3 plants each time. First time last year, no plants grew at all. Second time, summer of 2015, only one plant has grown and that's been only about 6 inches over the entire summer, and now we're in the middle of October, so I don't know if it's going to survive our midwest winters. Maybe in 2016 in will bloom. I thought it would be a great drought flower and maybe it will be if it ever grows.

          • Primary use:
          • Personal

          (1 of 2 customers found this review helpful)

           
          2.0

          locations need to be considered

          By 

          from SE Colorado

          About Me Avid Gardener

          Pros

            Cons

            • Flimsy

            Best Uses

            • Garden

            Comments about American Meadows Sea Holly Blue Star:

            I don't think this is a hot and dry weather plant. Came up nice but then died as the heat went up.

            • Primary use:
            • Personal

            (0 of 1 customers found this review helpful)

             
            5.0

            Love Sea Holly Blue Star

            By 

            from lewiston, id

            About Me Getting Started

            Verified Reviewer

            Pros

            • Attractive
            • Healthy
            • This Plant Did Really Wel

            Cons

              Best Uses

              • Garden
              • Outdoors

              Comments about American Meadows Sea Holly Blue Star:

              This plant did very well in full sun. I would like to order more.

              • Primary use:
              • Personal

              (2 of 2 customers found this review helpful)

               
              1.0

              Didn't Grow For Me!

              By 

              from Albuquerque, NM

              About Me Avid Gardener

              Comments about American Meadows Sea Holly Blue Star:

              This plant has beautiful color and presence, but did not grow well for me! One of the three that I purchased did not come up at all, and the other two started out like they would be ok and then died back! My garden looks amazing this year, but these particular plants did not do well at all, darn!

              • Primary use:
              • Personal

              (2 of 3 customers found this review helpful)

               
              3.0

              Grew but never bloomed

              By 

              from Mont Alto, PA

              About Me Avid Gardener

              Verified Reviewer

              Pros

              • Attractive

              Cons

              • Flimsy

              Best Uses

              • Garden

              Comments about American Meadows Sea Holly Blue Star:

              Grew a little during the summer, never bloomed. Was flimsy. Hoping it comes back in the spring to see it bloom.

              • Primary use:
              • Personal

              (1 of 2 customers found this review helpful)

               
              4.0

              I was being hopeful

              By 

              from Mobile, AL

              Comments about American Meadows Sea Holly Blue Star:

              I ordered these with the hope that they would do well here. The bare roots came in great shape, and tried their best to thrive. In the end our heat and humidity, baked and steamed them to death.

              • Was this a gift?:
              • No

              Displaying reviews 1-11

              Back to top

              Q & A

              Plant With These:

              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).

              Find Your Planting Zone:

              Enter your Zip Code to find your USDA Planting Zone

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