Grow maincrop potatoes in the ground for best results, as they'll have more space. Maincrop varieties tend to produce larger spuds for baking and roasting. Chit the tubers and plant up from March to mid-May for a harvest in approximately 20 weeks. Potatoes are an incredibly versatile crop - for a longer harvesting season look at our seed potato varieties. For more inspiration and help with growing potatoes, visit our potatoes hub page.