When the shoots have grown. Whatever you use for a container make sure it has good drainage. How To Grow Sweet Potatoes From Slips The branches will need support. Growing potatoes in pots uk . Cover with another 10cm 4in layer of growing medium then sit back and wait. Ad Find China Manufacturers Of Garden Planters. As the new stems start growing. Some people advocate growing first earlies or second earlies when youre growing potatoes in containers but there is nothing to say you cant use maincrop potatoes if your container is big enough. Add 10cm of peat-free multi-purpose compost to the bottom of the pot and place three to five chitted seed potatoes a hand with apart on the surface. These growing containers are lightweight environmentally friendly and made of fabric so your potatoes get air as they grow. Place 1 3 or 5 chitted seed potatoes on top of the compost depending on the surface area of your containers. The fourth week of March in average areas of the UK ...