How to Grow Leeks in Containers or Pots

Growing leeks in containers is a smart option for gardeners with limited space, poor soil, or raised-bed challenges. Over the years, I’ve successfully grown leeks in pots on patios, balconies, and raised platforms, and the results can be just as rewarding as in-ground planting. Container gardening also makes harvesting easier and helps control pests and soil conditions.

Table of Contents

Step 1: Choose the Right Container

Select a deep container—at least 12 inches tall and 12 inches wide—to accommodate leek roots.
Ensure it has drainage holes to prevent waterlogging.

Tip from experience: I’ve found that wide containers allow 2–3 leeks per pot without crowding.

Step 2: Prepare the Soil

Use a fertile, well-draining potting mix with added compost.
Avoid heavy garden soil that can compact in pots.
Mix in a little slow-release fertilizer for consistent feeding.

Step 3: Planting Leeks in Pots

Transplant seedlings when they are 6–8 inches tall.
Space 2–3 inches apart for smaller pots; 4–6 inches apart for larger containers.
Plant deep, leaving only the top few inches exposed to encourage blanching.

Step 4: Watering and Feeding

Keep soil evenly moist, as leeks dislike dry conditions.
Feed every 3–4 weeks with a balanced liquid fertilizer or compost tea.
Mulch with straw or shredded leaves to retain moisture and suppress weeds.

Step 5: Caring for Container Leeks

Rotate pots occasionally for even sunlight exposure.
Check for pests like onion thrips and slugs, which can still appear in containers.
Remove yellow or damaged leaves to keep plants healthy.

Step 6: Harvesting

Leeks are ready when stalks are 1–2 inches thick.
Gently tip the pot or slide the leek out, loosening the soil if necessary.
Container-grown leeks often have cleaner, straighter stalks than in-ground plants.

Final Thoughts

Growing leeks in pots is a rewarding option for small spaces. With deep containers, fertile soil, and consistent care, you can harvest tender, flavorful leeks just like those grown in the garden. I often use containers on my patio for early-season leeks and find they mature faster than in the ground.

Container-Grown vs. In-Ground Leeks

Feature	Container-Grown Leeks	In-Ground Leeks	Notes / Tips
Space Requirements	Ideal for patios, balconies, small spaces	Needs garden beds or wide rows	Containers are perfect for urban or limited-space gardens
Soil Control	Easy to manage soil fertility and drainage	Dependent on garden soil quality	Pots allow custom potting mixes for optimal growth
Pest Management	Easier to monitor and protect	Can be more exposed to pests	Containers reduce slug and snail issues
Blanching / Stalk Length	Can achieve long white stalks with deep pots	Achieved via hilling or tube methods	Tubes or hilling still recommended for in-ground leeks
Harvesting	Simple; often cleaner and straighter stalks	Requires loosening soil	Pots make pulling leeks easier, especially in tight soil
Yield	Moderate; limited by pot size	Higher; limited only by garden space	Larger beds produce more leeks per square foot
Maintenance	Watering and feeding more frequent	Less frequent; soil retains moisture	Containers dry out faster, so regular care is important