How To Grow Kale

Sarah June 2, 2023

As an ardent botanist and a seasoned gardener, I can’t help but admire the resilience and versatility of kale (Brassica oleracea var. acephala). Known by other names such as leaf cabbage or borecole, this nutritious leafy green is a joy to grow. While the process isn’t without its challenges, with a touch of tender loving care, the journey of growing kale can be incredibly rewarding.

To grow kale successfully, start by selecting a sunny spot with well-draining soil. Plant the seeds 1/4 inch deep and 12-18 inches apart. Water the seedlings regularly and provide them with 1-1.5 inches of water per week. Fertilize the kale with a balanced fertilizer every 4-6 weeks. Harvest the outer leaves when they are about 8-10 inches long.

Growing Conditions for Kale

The ideal hardiness zone for kale is from 7 to 9, but it’s remarkably adaptable and can grow in a wider range of climates. Kale thrives best in full sun, but it can tolerate partial shade. It prefers well-drained, fertile soil with a pH range of 6.0 to 7.5. The best time to plant kale is in early spring or late summer for a fall harvest. It’s a cold-hardy plant and can withstand frost, which interestingly, sweetens the flavor.

How to Plant Kale

There are two popular methods to plant kale: sowing directly into the soil and starting seeds indoors. Of the two, direct sowing is simpler. Start by tilling the soil about 12-15 inches deep and remove any weeds or stones. Create shallow furrows and space your seeds 1 inch apart. Cover with a thin layer of soil and water well.

How to Grow Kale in Pots

To grow kale in pots, choose containers at least 6-12 inches deep and wide. The process is similar to direct sowing, but you need to ensure good drainage and regularly check the moisture level. Kale grown in pots requires more frequent watering than those planted directly into the ground due to the limited soil volume.

How Long do Kale Take to Grow

Typically, kale takes about 55 to 60 days to mature from seed. Regular watering, adequate sunlight, and fertile soil can promote faster growth. Conversely, inadequate watering, poor soil, and pests can slow down the growth process.

How Big do Kale Get

A kale plant can grow up to 1-2 feet tall and 2-3 feet wide, offering abundant leaves for your culinary exploits.

How Much Sunlight do Kale Need

Kale grows best in full sun, but it can also tolerate partial shade. Ideally, it should receive at least 6 hours of sunlight per day.

How Much Water do Kale Need

Kale needs a consistently moist soil. Water it thoroughly once or twice a week, depending on the climate. Yellow leaves may indicate overwatering, while wilted or curled leaves may signify underwatering.

Fertilizing and Mulching Kale

While a well-aged compost should suffice, an all-purpose vegetable garden fertilizer can also be beneficial. Mulching helps retain soil moisture and suppress weeds. Fertilize once a month and mulch as needed.

How to Harvest Kale

Harvest the kale leaves from the outside, leaving the center leaves to continue growing. The best time to harvest is in the morning when the leaves are still fresh.

Pest and Disease for Kale

Kale is susceptible to pests like cabbage loopers, aphids, and diseases such as black rot and clubroot. Good gardening practices like crop rotation and avoiding water on the foliage can prevent most problems. If pests or disease do appear, organic or chemical treatments are available depending on your preference.

Sarah Hirsh

Hi! I’m Sarah and I live in a small town with my two boys. We have our own little garden where we grow vegetables every year. It's been so much fun to share my gardening journey in this blog!

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