Seed Potato

Seed Potato FAQs

Take a look at some of the frequently asked questions we receive from those looking to buy Seed Potatoes in the UK. You can contact our Customer Service Team or browse our general FAQs for further advice.

When to Plant Seed Potatoes

The best time to plant seed potatoes is in early spring, usually from March to April, depending on your local climate. Before planting, it’s recommended to “chit” the seed potatoes, which involves placing them in a cool, light place to encourage sprouting. This helps give the potatoes a head start in the growing season. Once the sprouts are about 2-3 cm long, the seed potatoes are ready to be planted. Choose a sunny spot with well-drained soil, and plant the seed potatoes about 10-15 cm deep, with the sprouts facing upwards. Space them 30 cm apart in rows that are 60 cm apart to allow for hilling and easy harvesting.

How to Grow Seed Potatoes

Growing seed potatoes is straightforward and rewarding. Start by preparing the soil with plenty of organic matter, such as compost, to ensure good drainage and fertility. After planting, cover the seed potatoes with soil and water them well. As the potato plants grow, mound soil around the stems to cover the lower leaves, a process known as "earthing up." This encourages the development of more tubers and protects them from sunlight, which can cause greening. Potatoes require consistent watering, especially during dry periods, to ensure a good yield. Harvesting can begin when the plants flower for new potatoes or later in the season for mature tubers.

How Long Does It Take to Harvest Potatoes?

The time it takes to harvest potatoes depends on the variety and your desired type of potato. Early or "new" potatoes can be harvested about 10-12 weeks after planting, typically in June or July. Maincrop potatoes, which are larger and better for storage, take longer to mature and are usually ready for harvest 18-20 weeks after planting, around late August to September. You’ll know the potatoes are ready when the foliage starts to yellow and die back. Carefully dig up the plants with a fork, being cautious not to damage the tubers, and let them dry for a few hours before storing.

Why Grow Seed Potatoes?

Growing seed potatoes offers many benefits, from enjoying a fresh, homegrown harvest to having control over the varieties you cultivate. Homegrown potatoes often have better flavour and texture than store-bought ones, which can be stored for long periods and lose their freshness. Potatoes are a versatile crop, providing a reliable yield with relatively low maintenance. They are also suitable for various growing conditions, including garden beds, raised beds, and even large containers. By choosing different varieties of seed potatoes, you can extend your harvest season and enjoy a range of culinary possibilities.

Where Can You Grow Seed Potatoes?

Seed potatoes are highly adaptable and can be grown in traditional garden beds, raised beds, or containers, making them suitable for gardens of all sizes. They prefer a sunny location with well-drained soil, but they can also thrive in slightly acidic soils. Potatoes are a great choice for crop rotation in your garden, helping to maintain soil health. If space is limited, you can grow seed potatoes in large pots or grow bags on a patio or balcony. With proper care, seed potatoes can be successfully grown in most UK climates, providing a satisfying and abundant harvest.

Why Seed Potatoes from Marshalls?

• Our customers are supported by a team of experts dedicated to providing valuable advice. You can also use our growing guides, backed by 70 years of experience, to get the best results from your Seed Potatoes.
• You can contact us six days a week – including bank holidays – to discuss our products and services or to chat about all things gardening.
• We pride ourselves on offering fast delivery on all orders, with any 'in stock' plants and seeds sent out within three working days. We're green-fingered in more ways than one, too, thanks to our fully recyclable packaging.
• We won second place at the 2022 Great British Growing Awards for Best Online Retailer.
• Thousands of five-star reviews on Feefo and a 100% satisfaction guarantee on all our products show that we're a company you can trust.