Crambe maritima
How to Grow Crambe maritima
Overview
Crambe maritima, also known as sea kale or seakale, is a unique vegetable that thrives in coastal regions of mainland Europe and the British Isles. This halophytic plant from the Brassicaceae family enjoys salty environments, making it an intriguing addition to your home garden if you have access to seaside land.
Growing Conditions
Crambe maritima prefers sandy or clay soils with a pH level between 6.1 and 7.8. It thrives in full sun but can tolerate partial shade. These plants are hardy and can withstand temperatures as low as -23°C (-9°F). They also have impressive salt tolerance, making them ideal for coastal gardens.
Planting & Care
Plant Crambe maritima seeds directly into the ground in early spring after the last frost. The seeds should be planted about 1-2cm deep and spaced roughly 30cm apart. Water regularly to keep the soil moist but not waterlogged, as these plants do not tolerate overly wet conditions. Fertilize lightly with organic matter if needed.
Common Problems
One of the few issues you may encounter is poor germination due to inadequate moisture or cold soils. To mitigate this, consider using a cloche or cold frame to protect your seedlings until they can withstand outdoor temperatures. Pests and diseases are generally not a concern for Crambe maritima.
Harvest or Enjoy
Harvest sea kale leaves as needed throughout the growing season. The larger, outer leaves should be removed first, allowing the inner ones to continue growing. For flower production, allow the plant to mature fully; flowers will appear in late spring or early summer. Enjoy your sea kale fresh in salads or cooked as a vegetable side dish.