How to Plant Seed Potatoes in a Container

Choose the Right Container

Use a container that is at least 16 inches deep and 16 inches wide. A 10-gallon grow bag or a large plastic pot with drainage holes works perfectly. Avoid dark-colored containers in hot climates — they can overheat the roots.

Pro tip: If you're growing multiple plants, opt for a larger container (20+ gallons) to give each potato plant enough room.

For the best results, use a high-quality potting mix designed for raised beds or containers – it provides the drainage and nutrients potatoes love.

Prepare Your Seed Potatoes

About 2 weeks before planting, place your seed potatoes in a cool, bright spot (but out of direct sunlight) to encourage sprouting. This process is called "chitting." Once the sprouts are about ½–1 inch long, they're ready to plant. If your seed potatoes are large, cut them into pieces, each with at least 2–3 eyes (sprouts), and let the cut surface dry for a day to prevent rot.

💡 Tip: Small seed potatoes can be planted whole – it’s simpler and reduces the risk of disease.

Fill the Container with Soil

Fill your container about one-third full with a good quality potting mix. Add a handful of balanced organic fertilizer or compost to give your potatoes a nutrient boost. Mix well.

Potatoes are heavy feeders, so using a slow-release fertilizer for vegetables can give them steady nutrition throughout the growing season.

Plant the Seed Potatoes

Place the seed potatoes (sprouts facing up) on the soil surface, spacing them about 4–6 inches apart. Cover them with 3–4 inches of potting mix. Water gently so the soil is evenly moist but not waterlogged.

Key point: As the plants grow, you'll "earth up" by adding more soil to cover the stems — this encourages more potatoes to form along the buried stems.

Watering & Care

Keep the soil consistently moist, but not soggy. Water when the top inch of soil feels dry. In hot weather, you may need to water daily. Potatoes need about 6–8 hours of sunlight per day.

To keep pests at bay, try natural pest control methods – they work just as well for container vegetables.

Harvesting Your Potatoes

Once the plants flower and the foliage starts to yellow and die back (usually 10–12 weeks after planting), your potatoes are ready. For "new" potatoes, you can gently dig around the sides of the container about 2–3 weeks after flowering.

Tip: To harvest all your potatoes, tip the entire container onto a tarp and sift through the soil. Store them in a cool, dark, dry place.