Sea kales, which are known botanically as Crambe maritima, are a type of vegetable that can easily be grown at home. Continue reading to learn the basics of growing sea kales as well as common mistakes to avoid along the way.
Quick Reference Guide for Growing Sea Kales
| Best Time to Plant | Early spring or late fall |
|---|---|
| Soil Type | Sandy, well-drained soil |
| Soil pH | 6.0-7.0 |
| Seed Spacing | 1″ apart in rows 10-12′ apart |
| Seed Depth | 1-2″ |
| Germination Time | 14-21 days |
| Harvest Time | 180-210 days from seed to harvest |
| Plant Size | 2-3′ tall with a 2′ spread |
| Safe for Bees | Yes |
Best Time to Plant Sea Kales
This will depend largely on your local climate, but as a rule of thumb, begin to plant the sea kale seeds in early spring or late fall. This is the best time to ensure that the seedlings survive the weather.
To check when sea kales are most likely to thrive in your area, see the USDA Plant Hardiness Zone Map. If you live outside the US, do a quick search for ‘plant hardiness zone + [city]’.
How to Plant Sea Kales the Right Way
There are a number of things to consider that will help you avoid some of the common mistakes of growing sea kales in your home garden. Often overlooked, your soil can have a huge impact on how well your sea kales grow. Generally, your soil should be sandy and well-drained. Soil PH levels should be around 6.0 to 7.0.
Sow the seeds 1″ apart in rows 10-12′ apart. The seeds should be sowed at a depth of about 1-2″. For each plant, be sure to sow at least a few seeds to ensure that at least one of them will germinate.
Begin thinning your sea kale seedlings 3′ apart when seedlings are 3-4″ tall.
How Much Sunlight is Needed to Grow Sea Kales
The amount of sunlight is another key to a successful harvest. Too much sunlight will dry out your sea kales. Not enough sunlight will stunt your its growth or even kill it. Ideally, your sea kales should be getting full sun.
How Much to Water Sea Kales
As you’ve figured by now, a lot can have an impact on how well your sea kales do, and the amount of water is no different. Ideally, the soil should be damp to touch; not soggy or bone dry. If the leaves on your sea kales begin to change colors or start to look droopy, you need to adjust how much water you’re giving it.
Unfortunately, if you give it too much or too little water, you can kill it, so it’s best to just keep an eye on it and water as needed.
How Long Does it Take Sea Kales to Germinate and Grow?
Now the fun part begins and you get to watch your sea kales grow. It takes approximately 14-21 days to germinate, and a total of 180-210 days from seed to harvest.
When to Harvest SeaKales
The best time to harvest your sea kales is in the second year of growth. Sea kales can grow up to about 2-3′ tall with a 2′ spread.
What Can Sea Kales Be Used For?
Food Use: leaves can be cooked like kale, flower buds like broccoli.
Flavor Profile: mild, sweet flavor similar to broccoli.
Can Sea Kales Grow in Pots and Containers?
No, it is generally not advised to grow sea kales in pots or containers.
Are Sea Kales Safe for Bees?
Yes, sea kales are safe for bees. According to GreenPeace.org, bees pollinate human food crops that make up about 90% of the world’s nutrition.
Given their importance in our ecosystem and food supply, it’s important to note that growing sea kales is bee-friendly.
