Eryngium Big Blue

Big Blue Sea Holly

Fabulous for hot, dry spots 'Big Blue' has green thistle-like foliage and blooms with huge 4" diameter bracts that surround the flower's blue center cone. An excellent cut flower, fresh or dried and a rugged plant for the xeric garden. Drought resistant/drought tolerant plant (xeric).
Zones4 - 9
Advantages
Attract Butterflies
Deer Resistant
Rabbit Resistant
Light Requirements
Full Sun
Annual Rainfall
10 to 20"
20 to 30"
30 to 40" (with care)
Mature Height28-30" tall
Mature Spread15-18" wide
Bloom TimeEarly to late summer
SizeNo
SKU49750

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:

You have entered an invalid zip code, please check your zip code and try again.

Product is Out of Stock
Out of stock
SKU
49750

Video

 
Details
28-30" tall x 15-18" wide. Fabulous for hot, dry spots 'Big Blue' has green spiky foliage supporting huge 4" diameter bracts that surround the blue center cone. This robust hybrid Sea Holly will entrance you as you watch the silvery bracts and green cones ripen to shades of shimmering blue in mid-summer. An excellent cut flower, fresh or dried. A rugged plant that offers both texture and color to the xeric garden. Drained Soil Plant with Lavender, Echinacea 'Rocky Top'.
More Information
SKU49750
Common Name
Big Blue Sea Holly
Botanical Name
Eryngium Big Blue
Zones
4, 5, 6, 7, 8, 9
Light Requirements
Full Sun
Mature Height
28-30" tall
Mature Spread
15-18" wide
Bloom Time
Early to late summer
Ships As
Potted Plant
Soil Type
Sandy Soil, Average Soil
Soil Moisture
Drought Resistant / Waterwise
Amount Of Rain
10 to 20", 20 to 30", 30 to 40" (with care)
Advantages
Attract Butterflies, Deer Resistant, Rabbit Resistant
Ideal Region
Anywhere In The US
Planting Time
Spring / Summer, Fall
Neonicotinoid Free
Item Unit Of Measure
Plant
Ships To Canada
No
Planting Guides

Eryngium (Sea Holly) is a genus of Old World perennials with attractive thistle-like flower bracts surrounding the round flowers. Highly attractive to honeybees and butterflies.
Preferred growing conditions:

  • Plant in a fast-draining, infertile soil with full sun. Avoid clay soils. Mulch with gravel or not at all.
  • Water regularly the first growing season to establish the plant. Thereafter, infrequent but deep watering is all this plant needs.
  • Deadheading is not needed as it will not extend the bloom season or bring the plants back into flower.
  • Fertilize lightly in the fall with a half and half blend of Yum Yum Mix and good quality compost.

Special comments:

  • Eryngium is a tap rooted plant and does not like to be transplanted once established.  Don't divide as tap rooted plants resent having their roots disturbed.
  • Seed heads are ornamental and attract seed-eating songbirds.
  • These are low care perennials that don't like rich soil or a lot of water; this makes the plants leggy and prone to flopping.

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

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.

Shipping Rates

Our shipping rates are calculated based on our actual average shipping costs. We do not seek to profit from shipping fees, so rest assured that our shipping rates reflect an average of what it costs to get our guaranteed products safely to your door.

US Shipping Charges

Merchandise Shipping
Charges
Up to $4.99$4.99
$5 to $9.99$6.99
$10 to $19.99$8.99
$20 to $29.99$9.99
$30 to $59.99$11.99
$60 to $99.99$13.99
$80 to $99.99$13.95
Over $10015%

Canadian Shipping Charges

Merchandise Shipping
Charges
Up to $24.99$14.95
$25 to $49.99$19.95
$50 to $74.99$24.95
$75 to $99.99$29.95
Over $100$39.95

We charge one low flat rate for shipping our products even if your order requires multiple shipments. If you have any questions, would like to purchase expedited shipping, or have quetions about shipping to Alaska or Hawaii, please call us at (800) 925-9387.

Reviews
Q & A

Suggested Companion Plants: