100% Synthetic Potting Mix?
Hey guys, I have about 50 plants in the 5-1-1 mix and I'm liking it.
That said, I'm thinking about a 100% synthetic mix. I'd like to replace the bark and peat with something that doesn't break down. I use air-pruning pots and grow mostly fruit trees and some vegetables in sizes up to 15 gallons. Because I don't need to root prune, I'd like to leave the trees i the mix indefinitely and not have to worry about the bark breaking down.
I've been looking at Grodan (rockwool) mini cubes, Growstones, turface and other substances. Since 5-1-1 and gritty act as a quasi hydroponic medium, I figure there should be something out there that has the right water retaining characteristics. Most of the hydroponic mixes are made for recirculating or constant drip, not leaving trees outside and watering once every few days.
Anyone tried this?