Growing Potatoes in Bags: A Practical Guide
Quick answer: Use a 30–45 litre (8–10 gallon) grow bag with drainage holes, plant 3–4 chitted seed potatoes per bag in loose, well-draining soil, and keep hilling up more soil as the plant grows. Water more often than you would in the ground, and expect a harvest in 10–16 weeks depending on the variety.