Flowering sea kale (Crambe cordifolia)
Flowering sea kale (Crambe cordifolia) is a perennial plant that can grow 1.5m – 3m tall and 50cm – 1.5m wide. In this growing guide we’ll learn the cultivation details and how to plant Flowering sea kale (Crambe cordifolia).
This plant has several common names including: flowering sea kale, heart-leaved colewort or greater sea kale.
This is a deciduous plant that takes 2-5 years to reach full maturity.
In this article
Plant profile
Common name: flowering sea kale, heart-leaved colewort, greater sea kale
Scientific name: Crambe cordifolia
Plant type: Perennials
Habit: Clump-forming
Height: 1.5m – 3m
Spread: 50cm – 1.5m
Foliage: Deciduous
Sunlight: Full Sun, Partial shade
Soil: Chalk, Loam, Sand
Moisture: Well drained
Garden type: Architectural, Informal Garden, Wildlife Gardens
Planting type: Cut Flowers, Flower borders and bedding
Other characteristics: Plants for pollinators, RHS Award of Garden Merit
Seasonal colors
| Season | Stem | Foliage | Flower | Fruit |
|---|---|---|---|---|
| Spring | ||||
| Summer | ||||
| Autumn | ||||
| Winter |
How to plant Flowering sea kale (Crambe cordifolia) – Meneerke bloem, CC BY-SA 3.0, via Wikimedia Commons
Perennial plants are one of the largest groups of plants.
They offer color, shape, fragrance and seasonal textures. The variety is such that there are plants to suit all sizes and styles of garden.
Traditionally, perennials are grown in borders, using a wall or hedge as a backdrop to bring out all their splendor during summer.
But since most gardens are not large enough for long borders dedicated exclusively to perennials, they are usually planted in mixed borders and beds, along with shrubs, annuals, biennials, and bulbs that extend the season of interest.
Other types of Crambe to consider:
See all Crambe
How to plant
In this section we will learn how to plant Flowering sea kale (Crambe cordifolia), know its needs in terms of soil, watering and sun exposure.
Soil
Flowering sea kale (Crambe cordifolia) is not a demanding plant regarding the type of soil and can grow in chalk, loam or sand.
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The chalky soil is pale and contains chunks of calcium-rich rock. It is a fertile and well-draining soil, almost always alkaline.
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The loam soil is dark, rich in organic matter but balanced in minerals. It offers the best of all worlds, retaining enough water for the plants, but allowing excess moisture to drain away. This is the most desired type of garden soil, perfect for most plants.
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Sandy soil is light, porous and very easy to drain. It is a soil poor in organic matter and nutrients. It is composed of relatively large mineral particles that allow water to drain quickly.
It is not very sensitive to soil acidity or alkalinity and grows well in soils with pH acid, alkaline or neutral.
Regarding drainage, Crambe cordifolia likes to grow in well drained soil.
Sunlight
Flowering sea kale (Crambe cordifolia) is a plant that should be grown in full sun or partial shade positions.
Cultivation profiles – Growing Flowering sea kale (Crambe cordifolia) – Krzysztof Ziarnek, Kenraiz, CC BY-SA 4.0, via Wikimedia Commons
