How does this work in winter?
Also, may have missed it, but do you plant the seeds right into the sand or sprout them first somewhere else? (I know basically nothing about gardening, sorry)
Great idea, and very tempting when I get into a new house.
The easiest way to get started is by planting the seeds into the sand, just push them in with your finger. I did plant sprouts in about half of each veggie bed, but I had to wash dirt off their roots, which really put them into shock.
The climate in our house varies so much that we need a heater in the winter and a cooler in the summer to keep it habitable. An additional grow room for plants would require the same and the cost would seem to outweigh the benefits, although I'm willing to be convinced otherwise.