4" Standard Plastic Nursery Pot. Round nursery pots are a staple of gardening worldwide. They’re low-cost, reusable, and study enough to hold even the biggest plants. Nursery pots come with small holes punched in the bases to increase water drainage and small handled to make lifting and moving pots easier. Plastic construction means rips and tears are a non-issue and that these containers will last for years before you’ll need to consider replacing them.