Kale growing in pots

How to Grow Kale in Pots: Soil, Spacing, and Care

ByStephen Albert

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Growing kale in pots is a fantastic way to enjoy fresh, nutritious greens even if you have limited garden space. With over 30 years of gardening experience—from cold-climate Iowa to California’s temperate Sonoma Valley—I’ve perfected container kale growing techniques that produce big, flavorful leaves. Whether you’re a beginner or seasoned gardener, this guide will help you grow thriving kale in pots with the right soil, spacing, and care.

Kale growing in pots
Kale growing in pots

Choosing the Right Pot

  • Size Matters: Use containers at least 12 inches deep and 12–18 inches wide per plant. Larger pots allow more root growth and better moisture retention.
  • Drainage: Ensure your pot has ample drainage holes to prevent waterlogging, which can cause root rot.

Soil for Potted Kale

  • Use High-Quality Potting Mix: Choose a well-draining, fertile potting mix rich in organic matter. Avoid garden soil, which can compact in containers.
  • Amend with Compost: Mix in compost or aged manure to boost nutrients and soil structure.
  • pH Level: Aim for a slightly acidic to neutral pH (6.0–7.0) for optimal nutrient uptake.

Planting and Spacing

  • Spacing: For optimal air circulation and growth, plant one kale seedling per 12–18 inch pot. If using larger containers, you can grow two plants spaced evenly.
  • Sowing: Start seeds indoors or buy transplants. Sow about ¼ inch deep. Thin seedlings to the strongest if starting multiple per pot.

Watering and Care

  • Keep Soil Moist but Not Soggy: Container soil dries faster than garden beds. Water when the top inch feels dry. Deep, consistent watering encourages healthy roots.
  • Fertilizing: Feed kale every 2–3 weeks with a balanced liquid fertilizer or organic option like fish emulsion. Container plants use nutrients faster.
  • Sunlight: Place pots where kale gets 4–6 hours of sunlight daily. Morning sun with afternoon shade is ideal in hotter climates.

Additional Tips

  • Rotate Pots: Move containers occasionally to ensure even sunlight exposure.
  • Pest Management: Check regularly for aphids and caterpillars. Use insecticidal soap or handpick pests as needed.
  • Harvesting: Snip outer leaves regularly to encourage new growth and keep plants productive.

Insight: My Container Kale Journey

When I lived in Iowa, I started many kale seedlings indoors due to short seasons. In California, container kale lets me grow fresh greens year-round on patios or balconies. Container growing requires attentive watering and feeding, but the rewards—a continuous supply of tender kale leaves—are worth it.

🥬 Kale Learning Hub

Start here: The Ultimate Kale Growing Guide: From Seed to Harvest

1. Types and Varieties of Kale

2. Planting and Timing

3. Seasonal Growing

4. Care and Maintenance

5. Container Gardening

6. Pests and Diseases

7. Harvest and Storage

8. Kale in the Kitchen

Stephen Albert is a horticulturist, master gardener, and certified nurseryman who has taught at the University of California for more than 25 years. He holds graduate degrees from the University of California and the University of Iowa. His books include Vegetable Garden Grower’s Guide, Vegetable Garden Almanac & Planner, Tomato Grower’s Answer Book, and Kitchen Garden Grower’s Guide. His Vegetable Garden Grower’s Masterclass is available online. Harvesttotable.com has more than 10 million visitors each year.

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