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Monkshood Blue Lagoon

Purple Monkshood Blue Lagoon, Aconitum cammarum, Monkshood
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Shipping begins in late March based on ground temperatures, warmest zones first. Learn More…

This shorter variety of Monkshood grows to be about 12” tall and is perfect planted in a border or small space garden. Blue Lagoon is deer resistant and will thrive in full sun to partial shade. (Aconitum cammarum) PP# 19136

Zones 3 - 7
Deer Resistant
Deer Resistant
Plants for Small Spaces
Plants for Small Spaces
Light Requirements
Full Sun
Full Sun
Half Sun / Half Shade
Half Sun / Half Shade
Mature Plant Size 10-12" tall, 8-10" wide
Bloom Time Mid to Late Summer
Size Bag of 3

Plant Information

Monkshood often reminds gardeners of delphiniums since the rich blue color is the same. But its much easier to grow. First of all, Monkshood is plenty tall, but shorter than the towering delphiniums that always need staking. This one stands on its own. And its not as brittle as a delphinium, so does a simpler job of adding tall blue flower spikes to your late spring garden. The roots are poisonous.
Common Name Monkshood
Botanical Name Aconitum cammarum
Zones 3, 4, 5, 6, 7
Light Requirements Full Sun, Half Sun / Half Shade
Flower Color Purple
Mature Height 10-12" tall
Estimated Mature Spread 8-10" wide
Bloom Time Mid to Late 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, Moist/Wet Soil
Soil Moisture Moist/Wet, Well Draining
Advantages Deer Resistant, Containers, Plants for Small Spaces
Ships to Hawaii, Alaska & Canada No


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

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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Q & A

Plant with These

  • All Annual Wildflower Seed Mix

    All Annual Wildflower Seed Mix


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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).

Find Your Planting Zone:

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