Growing kale in pots
Although commonly grown directly in the ground, you can also grow kale in a pot. Learn which types of kale are suitable for container growing and how to care for them.
With its high nutritional content kale (Brassica oleracea Acephala Group) is now widely regarded as a superfood. In general, kale is cultivated in a bed or vegetable patch, but there are also some smaller kale varieties that are suitable for growing in containers or pots.
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Growing kale in pots: which types of kale can be grown in pots?
With a wide array of kale varieties available to grow, you will want to choose one that is not only suitable but will thrive when grown in a pot. Growing Cavolo Nero in pots or containers is usually not recommended as it can grow more than 1.2m tall and is better suited to growing directly in the ground than a pot. Instead, choose a dwarf cultivar, which will remain small and not become unstable in high winds. Along with size, some kales are hardier than others, which can be important to pay attention to if growing kale in exposed or colder spots.
How to grow kale in a pot
Whether you grow kale directly in the ground or in a pot, kale prefers a fertile soil that is free-draining. Kale grows best in full sun but it can also tolerate some light shade. However, in south-facing locations, it can be wise to protect your kale from the harsh midday sun, which may cause the foliage to wither. When growing kale in a pot, you will want to give it the goodness it requires to thrive as a heavy feeder.
To do this, use a vegetable compost like our Plantura Organic Tomato & Vegetable Compost to grow kale in. Our compost is not only enriched with the essential nutrients to get kale off to a good start but is also peat-free, making it more sustainable and better for the environment.
- Perfect for tomatoes & other vegetables such as chillies, courgettes & more
- For strong & healthy plant growth as well as an abundant vegetable harvest
- Peat-free & organic soil: CO2-saving composition
If you are wondering what size pot kale needs, a minimum size of 30cm wide by 30cm deep is recommended to support the plant. Adequate drainage holes must also be present to allow any excess water to drain away freely and prevent the soil from becoming saturated. Using a pot or planter is ideal for growing kale on a balcony or patio or where space is limited.
When growing kale in pots, you can either purchase young plants in spring or grow kale from seed. If growing from seed, you can sow kale indoors in March or April to plant outside in May to June. To plant out your kale, add a layer of crocks or gravel to the bottom of the pot to increase drainage and half-fill with compost. Place the kale in the pot slightly deeper than it was previously planted so that the lowest leaves are just above the soil. Backfill with compost, gently firming in as you go and water thoroughly. To give the plants enough room to thrive, one plant per pot is usually enough. However, for larger planters, you can plant several kale plants at a spacing of 30 to 45cm.
Tip: even though kale prefers to be grown in full sun, it will also tolerate some light shade.
Potted kale plant care
Since any soil in a pot dries out more quickly than a bed or a border, watering container-grown kale regularly is essential to support its leafy growth and prevent the soil from drying out. As a general rule, once the top 2 to 3cm of soil has dried out you can give the pot a slow and thorough water. Where possible, harvested rainwater should be used, especially in hard water areas.
Being hungry plants, fertilising kale in pots is certainly of benefit, as when grown in a pot the nutrients can leach out over time. A liquid tomato fertiliser like our Plantura Liquid Tomato Food is perfect for feeding kale in pots, as it contains nitrogen to help support the leafy growth and can easily be applied at the time of watering.
- Perfect for tomatoes & other vegetables
- Liquid fertiliser for healthy plant growth & an abundant harvest
- Quick & easy application - child & pet friendly
Depending on the variety and height of kale you choose to grow, you may also need to stake your kale plant to prevent it from wind damage or toppling over. To support your kale plant, tie the stem with string to a secure post or bamboo cane inserted deeply into the soil.
Having planted your kale in a pot, you could be harvesting the baby leaves in just a few weeks. However, for mature leaves, you will have to wait several months as the lower winter temperatures can actually improve the taste. Discover more about how and when to harvest kale in our dedicated article.
