What would be the best growing medium for lettuce in NFT? I am building a green house for commercial growing of leafy lettuce. The NFT gullies will be 2.5 inches x 3 inches pvc rectangular downspouts.
1. Presently I am thinking of using perlite in net pots that are 2 inches in diameter. But since lettuce is a very fast crop, I don't know if its advisable. Do I have to clean the perlite pellets every planting cycle?
2.My next choice would be sponge cubes, just to hold the plants in place. It would be the same cubes I will be using at seedling stage. So no worry of plant stress in transplanting. Do I have to put the cubes inside the net pots? Or can I just use 1 inch pvc connectors? My plan would be to insert the sponge cubes in the pvc connectors that I can plug in pre drilled holes in the nft gully.
The only problem I see there is if we encounter a power shortage in the middle of the day.
3.3rd choice would be a combination of perlite and pumice stone.
adrianag
mangojonOriginal Author
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