C. Letellier wrote:I have done floating tomato gardens for over a decade. From what I see here are the problems I expect to see. 1. The raft sinks a bit as the season goes on changing the water level in the soil and suddenly the plants are yellowing from over water. I had this problem with my early tomato rafts. The solution is to add removable weight at the beginning of the season that you can take off when things start to over water later. 2. problems with not enough soil depth. Most plants need deeper soil to do well in this situation. Tomatos handle low soil depths better which is one of the reasons mine are mostly tomatoes. 3. Lack of soil containment walls will have soil washing over board during high wind and wave times.
My raft is less renewable. Primary buoyancy comes from 70 2 liter pop bottles. The are corralled by frame of 4" pvc. That is topped with construction foam as a fairly rigid and rot proof soil support. Soil is a nearly totally organic material potting soil.(you don't want dirt here as it holds to much water and manure based potting soils have the same problem.)
ashley bee wrote:Hi Marianne, what a wonderful project! I hope folks don't mind the thread resurrection, I'd just love to hear how you're design evolved over the years.