There are two microgreen trays included in it with enough potting mix and seeds for both of them; you can complete two cycles of growing microgreens using this kit. The trays are highly durable and can be used for a longer period. You will need to get the new seeds and potting mix for growing more. You can also use the same potting mix by washing and drying it 2-3 times, but we suggest you to use fresh media each time you sow new seeds.