Alan Titchmarsh's Expert Guide to Growing Potatoes: Tips from the Pros

Alan Titchmarsh’s Expert Guide to Growing Potatoes: Tips from the Pros

Growing potatoes is one of the most satisfying experiences for home gardeners, combining the thrill of discovery as you unearth your harvest with the unmatched flavor of homegrown spuds.

Alan Titchmarsh, beloved presenter of BBC Gardeners’ World and Britain’s most trusted gardening expert, has been cultivating these versatile tubers for decades in his Hampshire garden. His time-tested methods demonstrate why potato growing remains a cornerstone activity for gardeners seeking self-sufficiency, value for money, and exceptional taste. In this comprehensive guide, you’ll discover Titchmarsh’s professional insights on selecting the perfect varieties, proper planting techniques, essential care routines, harvesting methods, storage solutions, and delicious cooking ideas.

Planning your potato patch

Success with potatoes begins long before the first tuber touches soil.

Alan Titchmarsh, drawing from his extensive experience at prestigious gardens including Otter Farm, emphasizes that thoughtful planning determines your harvest’s timing, quality, and abundance.

Potatoes are categorized by their maturity time, with each group serving different culinary purposes:

First earlies: Ready in 10-12 weeks, these provide tender new potatoes perfect for summer salads and simple buttered dishes. ‘Rocket’, ‘Arran Pilot’, and ‘Swift’ are Titchmarsh favorites for their reliability and sweet flavor.
Second earlies: Harvestable after approximately 14-16 weeks, these versatile potatoes include the creamy-textured ‘Charlotte’ and the buttery ‘Kestrel’, ideal for summer dining.
Maincrop varieties: Taking 18-20 weeks to mature, these potatoes produce the largest yields and store well through winter. ‘Desiree’, ‘King Edward’, and ‘Maris Piper’ represent the gold standard for baking, mashing, and roasting.

When selecting your growing location, consider that potatoes thrive in open, sunny positions with well-drained soil.

For gardeners with limited space, container growing offers an excellent alternative—potato bags, deep pots, and even old dustbins can produce impressive harvests.

Always purchase certified seed potatoes rather than using supermarket tubers. The latter may carry diseases and have been treated with sprouting inhibitors. Quality suppliers like Thompson & Morgan and the Royal Horticultural Society offer disease-free, certified stock that ensures a healthy start.

How to chit potatoes

Chitting potatoes—encouraging them to sprout before planting—gives your crop a head start, resulting in stronger plants and earlier harvests.

This simple process typically begins 4-6 weeks before your planned planting date.

To chit your seed potatoes:

arrange tubers in egg cartons or seed trays with the ‘rose end’ (where most eyes appear) facing upward
place in a cool, light location away from frost—a bright windowsill in an unheated room is ideal
aim for 10°C (50°F) temperatures to develop short, sturdy shoots rather than long, weak ones
wait until shoots reach 1-2 cm long before planting

“I’ve found that properly chitted potatoes can produce harvests up to two weeks earlier than unchitted ones,” Titchmarsh notes in his BBC Gardeners’ World demonstrations, showing how this simple step pays dividends throughout the growing season.

Planting techniques & setup

Growing potatoes requires specific planting approaches depending on your garden space and goals. Whether you’re working with traditional rows or modern container methods, proper setup establishes the foundation for a successful harvest.

Timing is crucial when planting potatoes. In southern regions of the UK, first earlies can go into the ground from mid-March, second earlies in early April, and maincrops by late April. Northern gardeners should delay each stage by 2-3 weeks to avoid late frosts damaging emerging shoots. The soil temperature should consistently reach at least 7°C (45°F) before planting.

Prepare your soil thoroughly by removing weeds and incorporating plenty of well-rotted organic matter. Potatoes prefer slightly acidic conditions with a pH between 5.5 and 6.5. Avoid planting where potatoes, tomatoes, or aubergines have grown in the past three years to prevent disease buildup.

For in-ground planting, dig trenches approximately 12cm (5in) deep.

Space seed potatoes 30cm (12in) apart, with rows 60-75cm (24-30in) apart. Place each tuber with the sprouted end facing upward, then cover with soil, forming a slight ridge above each row.

Container growing offers flexibility and easier harvesting.

Choose containers at least 30cm (12in) deep with adequate drainage holes. Place 10-15cm (4-6in) of compost in the bottom, position 3-4 seed potatoes on top, and cover with another 10cm (4in) of growing medium.

Bag-growing hack

One of Alan Titchmarsh’s favorite space-saving methods involves growing potatoes in specially designed grow bags or even repurposed compost sacks:

select a sturdy bag and roll down the sides to create a shorter container
add 10cm (4in) of good quality, peat-free compost to the bottom
place 4-5 chitted seed potatoes on the compost surface, evenly spaced
cover with another 10-15cm (4-6in) of compost
as plants grow, gradually unroll the bag sides and add more compost to cover stems
continue until the bag is full or plants reach the top

This progressive filling technique, combined with the naturally loose growing medium, makes harvest day remarkably simple—just tip the bag over and collect your treasure.

“Container growing eliminates the need for digging and makes potatoes accessible even to balcony gardeners,” Titchmarsh highlights in his practical demonstrations.

Care & maintenance during growth

The care you provide during the growing season directly influences your potato harvest’s quality and quantity. Following Alan Titchmarsh’s maintenance regimen helps ensure healthy plants and abundant tubers.

Earthing up represents the most distinctive aspect of potato cultivation.

As shoots emerge and grow to approximately 15cm (6in) tall, draw soil up around them, leaving just the top few centimeters exposed. This process protects developing tubers from sunlight (which causes greening and toxic compounds), increases yield, and improves drainage. Repeat every few weeks until plants begin flowering or mounds reach 15-20cm (6-8in) in height.

Water management proves critical for potato success. While established plants tolerate brief dry spells, consistent moisture particularly benefits developing tubers. Water deeply during flowering and tuber formation, aiming to keep soil evenly moist but never waterlogged. Apply approximately 25mm (1in) of water weekly during dry periods, preferably at the base of plants to keep foliage dry.

Fertility requirements increase as plants develop. Apply a balanced organic fertilizer when planting, then supplement with a high-potassium feed (such as comfrey tea or tomato fertilizer) when plants begin flowering. The Royal Horticultural Society recommends avoiding excessive nitrogen, which promotes lush foliage at the expense of tuber development.

Disease prevention remains essential for potato growing success. Potato blight, the notorious disease that caused the Irish Potato Famine, remains the primary threat. This fungal infection typically appears during warm, wet weather in July and August, causing dark patches on leaves that quickly spread. Prevention focuses on:

choosing blight-resistant varieties like ‘Sarpo Mira’ and ‘Carolus’
maintaining good air circulation by proper spacing
watering at soil level rather than overhead
removing infected foliage promptly and destroying it (never composting)
considering protective copper sprays for organic prevention

Regular inspection helps catch problems early. Check undersides of leaves for aphids and watch for Colorado potato beetles, removing them by hand. Consider companion planting with marigolds, horseradish, or nasturtiums to deter pests naturally—a technique Titchmarsh demonstrates regularly in his garden demonstrations.

Harvesting & storage

Knowing when and how to harvest your potatoes determines both their immediate quality and long-term storage potential. Alan Titchmarsh’s harvesting expertise focuses on timing, technique, and preservation methods.

First earlies typically become ready for harvest when plants begin flowering, usually 10-12 weeks after planting. Rather than removing entire plants, experienced gardeners often “bandicooting”—carefully reaching beneath the soil surface to extract a few tubers while leaving the plant to continue producing. Second earlies follow a similar pattern but with slightly longer maturation periods of 14-16 weeks.

Maincrop varieties require different handling. Wait until foliage yellows and dies back naturally, or cut stems to ground level 2-3 weeks before your planned harvest to toughen skins for storage. Choose a dry day for harvesting maincrops, ideally with forecasted sunshine ahead.

Tools matter during potato harvesting. A garden fork works best, inserted vertically about 30cm (12in) from plant stems to avoid spearing tubers.

Lift gently, working around each plant methodically. Container-grown potatoes simplify the process—simply tip the container onto a tarp and separate tubers from compost.

Post-harvest handling significantly impacts storage longevity. Allow freshly harvested maincrop potatoes to dry for a few hours in a single layer away from direct sunlight. This crucial step helps cure the skins and heal minor injuries. Brush off loose soil rather than washing tubers intended for storage.

For optimal potato storage, place clean, dry tubers in paper sacks, hessian bags, or wooden crates. Store in a cool (7-10°C/45-50°F), dark, well-ventilated location with moderate humidity. Check regularly for sprouting or softening, removing affected tubers promptly. Under ideal conditions, properly stored potatoes remain viable for 4-6 months, providing homegrown produce throughout winter.

Cooking & enjoying your homegrown potatoes

The culinary versatility of homegrown potatoes represents the ultimate reward for your gardening efforts.

Different varieties excel in specific preparations, and understanding these characteristics helps maximize your enjoyment.

First earlies like ‘Rocket’ and ‘Swift’ shine with minimal intervention. Simply scrub these tender-skinned treasures and boil briefly until just tender, then toss with butter, fresh mint, and sea salt for a dish that epitomizes summer simplicity. Their delicate flavor diminishes with storage, so enjoy these varieties fresh from the garden.

Second earlies offer greater versatility. The waxy texture of ‘Charlotte’ and ‘Nicola’ makes them ideal for potato salads and roasting, while ‘Kestrel’ provides enough starch for excellent mashing while maintaining structure for gratins and casseroles.

Maincrop varieties demonstrate specific cooking strengths based on their starch content:

Floury varieties (‘King Edward’, ‘Maris Piper’) excel in roasting, baking, and mashing applications
All-purpose types (‘Desiree’, ‘Cara’) perform well across multiple cooking methods
Waxy potatoes (‘Pink Fir Apple’, ‘Anya’) hold their shape when boiled or steamed, making them perfect for salads and casseroles

Experiment with heritage varieties that rarely appear in supermarkets. The purple-fleshed ‘Salad Blue’ creates dramatic mashed potatoes, while knobbly ‘Pink Fir Apple’ offers nutty flavors perfect for potato salad. These unique varieties demonstrate why growing potatoes at home offers culinary experiences beyond commercial offerings.

Alan Titchmarsh’s favorite simple recipe features new potatoes sautéed with rosemary, garlic, and good olive oil—a preparation that showcases homegrown quality. Whatever cooking method you choose, homegrown potatoes deliver superior flavor and texture that reward your growing efforts with every bite.

Conclusion

Growing potatoes rewards gardeners with unmatched satisfaction—from the anticipation of chitting to the excitement of harvest day. By following Alan Titchmarsh’s expert guidance on variety selection, proper planting techniques, consistent care, and appropriate harvesting methods, you’re well-equipped to enjoy abundant, delicious potatoes throughout the year. Whether you’re cultivating a traditional vegetable plot or maximizing container space on a patio, potato growing offers accessible success for gardeners of all experience levels.

The cycle begins anew each season as you select varieties, prepare seed potatoes, and anticipate the first tender tubers of summer. Start planning your potato patch now, perhaps beginning with first earlies in containers for a quick reward, then expanding to experimenting with heritage varieties in subsequent seasons. Before long, you’ll develop your own potato-growing expertise—building on Titchmarsh’s foundations while adapting to your unique growing conditions and culinary preferences.