Majestic' Main Crop Seed Potatoes are a variety that can be planted in many different soil types. The gorgeous, creamy-white flesh is the building block for its rich flavour, making it great for use in many culinary tasks. You will find that these potatoes will harvest in the months of July - September. Late March is when they should be planted, in a sheltered plot in the garden where moist, well-drained soil is present. Although, If you have limited space, you can also grow them in potato bags on a patio.