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The Ultimate Guide to Potatoes Square Foot Garden


Square foot gardening involves dividing a raised garden bed into small square sections and growing different plants in each section. This maximizes the use of space and helps to control weeds and pests. We will focus specifically on the potato square foot gardening method.

Choosing the Right Site for Square Foot Gardening Potatoes

Sunlight Requirements

Potatoes need at least 6 hours of direct sunlight per day. Avoid shady spots or areas that are partially shaded by trees or buildings. The potato plants will become weak and spindly without enough sunlight. This results in small potatoes or no harvest at all.

Soil Preparation

Potatoes need loose, well-draining soil with plenty of organic matter. The soil pH should be 5.0 to 6.0. You must remove any rocks, weeds or debris before planting. Incorporate compost or aged manure to improve the nutrient content and texture of the soil.

Ideal Location within Your Backyard

You should choose a flat site with good air circulation. Avoid low-lying areas that are prone to waterlogging. Potatoes require consistent watering throughout their growing season. So having a nearby water source will make this task more manageable.

Finally, avoid areas with strong winds or where pets or wildlife may damage your plants. Ensure there are no underground utility lines in the chosen spot.

Building Potatoes Square Foot Garden

Materials Needed for Construction

Lumber for the frame: You'll need four pieces of 2x6 lumber, each measuring 4 feet in length.

Screws or nails: Use these to secure the corners of the frame together.

Hardware cloth or chicken wire: This will serve as a barrier at the bottom of your garden box. It prevents pests from burrowing in and damaging your potato plants.

Soil: The soil type will depend on your specific climate and the nutrient needs of potatoes. Consult with a local gardening expert for recommendations.

How to Build a Potato Square Foot Garden?

Begin by selecting a location for your potato garden with six hours of sunlight per day. Lay out your 4x4 piece of lumber on the ground. Cut it into four equal pieces. Each measuring one foot in length.

Using nails, attach these four smaller pieces to the corners of your 2x6 lumber frame to create a box. Place the hardware cloth or chicken wire inside the box. Make sure to secure it tightly.

Fill the box with your selected soil. Leave about an inch of space at the top. Use a trowel or your hands to create six-inch-deep holes throughout the soil. Space 12 inches apart in a grid pattern.

square foot gardening potatoes

Best Potato Varieties for SFG

Potato Varieties Suitable for Small Spaces

Indeterminate vs Determinate? Early varieties mature faster and you can harvest them in as little as 60 days. Mid-season potatoes take around 80-90 days to mature. Late season potatoes are indeterminate potatoes. Late varieties require up to 120 days.

For small space gardens, early and mid-season potatoes are the best options. Because they have a shorter growing period and you can harvest them before the main growing season ends. These varieties also produce small potatoes. So they are ideal for square foot gardening (SFG).

Factors to Consider when Choosing Potato Varieties

Space Efficiency: You can grow potatoes in containers or raised beds. Look for compact or dwarf varieties that produce a high yield in a limited area. They require less space compared to traditional open-field growing.

Disease Resistance: Choose potato varieties that are resistant to common diseases. For example, blight and scab. In small spaces, it's easier for diseases to spread. So selecting disease-resistant varieties can help prevent crop loss.

Recommendations for High-Yielding and Space-Efficient Varieties

Yukon Gold: This early-maturing variety produces medium-sized potatoes. They have good disease resistance and a high yield.

Red Pontiac: Another early variety, the Red Pontiac is known for its vibrant red skin and creamy white flesh. It also has excellent disease resistance and yields well in small spaces.

French Fingerling: It produces small but flavorful potatoes. They have a longer maturity time. So they are best suited for gardeners with a longer growing season.

All Blue: It has dark blue skin and blue flesh. All Blue also has good disease resistance and yields well in small spaces.

Kennebec: This variety is known for its large, oblong-shaped potatoes and high yield. It's also resistant to scab and blight.

Planting Potatoes in Square Foot Beds

How Many Potatoes Per Square Foot?

The general rule of thumb is to plant one potato per square foot. Each plant will have enough space to grow and develop without overcrowding.

Potato Spacing Square Foot Gardening

However, if you have larger square foot beds, you can increase the number of potatoes per square foot accordingly. For example, 1 potato, 2 potatoes or 4 in a square foot.

How to Grow Potatoes in Square Foot Garden?

The first is to create mounds within each square foot bed. Cover the potato plants with compost. This will allow the potato roots to spread out and grow without being confined to a small space.

Another technique is to use a trellis or stakes for vertical growth. This can save space and provides support for the potato plants as they grow taller.

Companion Planting to Enhance Potato Growth

One beneficial companion plant for potatoes is peas. They are nitrogen-fixing plants. Planting peas alongside potatoes can provide a natural source of nitrogen. Beans are also nitrogen-fixing plants. Their deep roots can improve soil structure and drainage.

Planting marigolds around your potato beds can deter harmful pests and reduce the need for pesticides. You can also plant basil, thyme, or rosemary near potatoes. They have strong scents which can repel pests and prevent diseases.

Caring for Your Potato Square Foot Garden

Watering Strategies for Potatoes

The watering needs vary depending on the growing stage. In general, they require about an inch of water per week during the growing season. Avoid overwatering because it can lead to diseases and rot in your plants.

Use a drip irrigation system or a soaker hose to ensure proper watering. These methods provide a slow and steady stream of water directly to the roots. Avoiding wetting the foliage which can promote diseases.

Check the soil moisture regularly using a moisture meter or by simply inserting your finger into the soil. If the top inch of soil feels dry, it's time to water your plants.


Before planting, mix in a balanced fertilizer into the top few inches of soil. As the plants grow, side dressing with nitrogen-rich fertilizer every 2-3 weeks. This can promote healthy foliage and tuber development. The potato yield per square foot will be higher.

Common Pests and Diseases

Some common pests include aphids, potato beetles, wireworms, and cutworms. Practice crop rotation and remove any debris or weeds that may harbor them. This prevents these pests from infesting square foot garden potatoes.

In case of a pest infestation, try using natural predators to control their population. For example, ladybugs. Alternatively, you can use organic insecticides specifically designed for potato pests.

Diseases can also impact your potato plants. For example, blight, scab, and rot. To prevent these diseases, avoid watering the foliage and use disease-free seed potatoes. If you notice any signs of disease, remove infected plants immediately.

When and How to Harvest Potatoes?

Signs for Harvest

Foliage turns yellow: As the potatoes mature, the foliage of the plant will start to turn yellow and wilt. This indicates the plant is no longer producing new potatoes.

Skin sets: When the skin of the potato becomes firm, they are ready for harvesting. You can gently brush off some soil from the top of the potato to check the skin. If it feels firm and does not easily rub off, then it's time to harvest.

Flowering: Some potato varieties produce flowers when they are ready for harvesting. Pay attention to these delicate blooms. They are a clear sign that your potatoes are ripe.

Harvesting Techniques

Gently insert a garden fork or shovel into the soil. Keep at least one foot away from the plant. Carefully lift the potatoes out of the ground using your hands. Avoid pulling or tugging on the plant as this can damage the tubers. Then, gently shake off any excess soil. This prevents it from getting into your storage containers.


Square foot gardening is a popular and efficient method for growing potatoes. We have discussed the key points of potatoes square foot garden. For example, its benefits, steps to follow, and potential challenges.

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