Sea Kale Mix Seeds

Sea Kale Mix Seeds - Crambe maritima

Crambe maritima

Hardy to Zone 4
Full Sun
Germination Tested Cut test: 80%

Approximately 25-30 seeds per packet

$6.95 CAD

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Expected to restock in December 2026.

Sea kale is an essential perennial vegetable- the whole plant is edible! The most commonly eaten parts are the unopened flower buds that look and taste like small broccolis, and the spring shoots, which are often blanched with a bucket to make them more mild and tender. The young leaves are also delicious, and can be used similarly to kale. Plants produce masses of honey-scented flowers that make a beautiful edible garnish, and the unripe seed pods that follow can be used like peas. The root of plants that are at least two years old can be dug any time of year and roasted or boiled. Talk about a useful vegetable!

These seeds include genetics from many different sources. There are green and purple plants, improved varieties, and cold-tolerant selections from several growers in the US and Canada.

Sea kale is native to European beaches and likes a sunny position and well drained soil. I find it grows well in normal garden soil with regular additions of compost. Plants take a few years to get large enough to withstand harvesting, eventually reaching 2-3 feet wide (they may grow larger if not harvested much).

Propagation by seed is a bit tricky- the seeds require a long germination period. I find it works best to sow outdoors in pots in fall. The seeds also must be cracked open before sowing. See detailed growing instructions below.

Sea kale is most easily propagated by root cuttings taken in the fall through winter as weather permits, and planted immediately. For places with cold winters (i.e. below zone 6) root cuttings can be stored in the fridge in moist media and planted in spring. Plants grown by root cuttings can be lightly harvested starting the year after planting.

Growing Instructions

Sea kale seeds require a long cold stratification period to germinate. I find fall-sowing has the best results so seeds get several months of cold outdoors. If you don't have good germination- keep the pot and let it go through another winter outdoors.
Alternately you could try stratifying in the fridge for 3+ months.
Crack each seed open with nail clippers before sowing to help them sprout. You can either completely remove the seed from the corky shell, or just take a chunk of the shell off.

Shipping & Returns

By placing an order, customers agree to the shipping & refund policies detailed on this page.

Most orders are sent via Canada Post to keep costs low.

Shipping within Canada

We ship seeds in Canada via Canada Post's regular letter mail, which is an untracked service, and usually takes 1-4 weeks to arrive once we fulfill your order, but occasionally letter mail takes up to 6 weeks, especially to the Eastern provinces and rural areas.

Customers can now opt for tracked, express shipping options at checkout if you require faster delivery and/or tracking.

Larger bulbs and plants are usually sent via tracked flat rate box.

Shipping to the US

UPDATE FEB 2, 2026: WE ARE TAKING A BREAK ON ACCEPTING US ORDERS DUE TO ISSUES WITH USPS

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Shipping Internationally

International customers can select tracked or untracked shipping at checkout. The package will list the contents as "Garden Seeds". It is your responsibility to ensure you have the required import permit. We are not able to send any live plant materials internationally. Cicada Seeds will not be responsible for any orders held or confiscated by customs, or for any additional duties or tariffs placed on your order.

International shipping countries include: Hong Kong SAR, Ireland, Japan, Malaysia, Netherlands, Norway, Singapore, Spain, Sweden, Switzerland, United Arab Emirates, United Kingdom. (List updated Aug 31, 2026)

This list may change without notice. Sometimes Canada Post will not allow us to ship to certain countries due to wars or natural disasters, see this page for delivery service alerts.

Refund Policy

Refunds: We stand behind our seeds, so if for some reason you are not satisfied with your purchase, please reach out to us via email and we will do our best to make it right. Please note that shipping costs are non-refundable.

Cancelled orders: If you wish to cancel an order after purchasing, we may refund your order minus card processing and admin fees at our discretion. We do not accept returns on seeds or plants.

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