This will depend on a variety of factors such as available light, nutrients, humidity, water and air temps, pH, oxygen and air flow to name a few! Based upon the size of the systems and the 28 hole raft boards, we can tell you exactly how many planting spaces you will have. For maximum production we recommend seeding, transplanting and harvesting on a consistent basis, The frequency of these activities will depend on the environmental factors noted above along with other potential sales, distribution and market factors.