5 Inch Heavy Duty Plastic Nursery Pots. Start your garden off right this year with these reusable, 5-inch seedling pots. Thoughtfully designed with vegetable and flower gardeners in mind, these durable 5-inch pots are the perfect size for potting-up tender seedlings. These pots are designed to fit perfectly in a 1020-deep tray with a stabilizing liner (not included). These seed-starting pots are heavy-duty and designed to last multiple seasons and plantings. Great for home gardeners, nurseries, garden centers, and community garden clubs.