I am looking at building a small NFT system to test the viability of growing lettuce commercially for local consumption.
Investigating options for NFT. Right now I am looking at using 3"-4" PVC or ABS pipes.
When I was checking prices on these materials, I noticed a 4" x 2" eaves trough made of PVC. The flat bottom would be better suited to an NFT system, but I am not sure if this will be deep enough to grow the lettuce properly.
I am looking at growing Romaine and Butterleaf mostly (Though this may change).
Thanks in advance