Ferry Morse Jiffy Seed Starter Greenhouse 72 is a greenhouse with 72 small pots that are already formed out of opaque plastic, so no Jiffypots or Jiffystrips are in there. Just place some soil and seeds and start growing the plants.This lightweight plastic planting tray is an 11 x 22 inch tray with 72 small pop-out cells, each perfect for germinating three to five seeds. Simply fill the cells with soil and place them in the handy base tray. Then plant the seeds, cover the tray with the reusable clear plastic greenhouse dome (sold separately) to create the proper humidity level, and watch them grow. When your seedlings are well rooted, simply pop the individual plants from the container, and they're ready for replanting in a larger pot or in your garden.