The roots will be as large as the plant, so choose the bag according to the size of the roots. Don't buy a very large bag unless you are going to plant something large.
[header] How to use growing bags for plants [title] Purchase your growing bag. [step] You can purchase a growing bag at a nursery or home improvement store. You can choose a plastic or fabric growing bag, but fabric growing bags often need to be watered more than plastic bags.