have not tried it yet, but the idea is to have the potting soil 5-7cm below the top of the container to give a small "reservoir" to direct the water/nutrients directly to the roots of the plants...I have been thinking about doing this since I moved one of my Trinidad Scropion plants that was potted in a 5 gallon container and was 5 feet tall...when I went to move it, there was resistance so I just jerked the container up and there was 4 or 5 roots that had grown out of the holes in the bottom of the container that were at least 5mm in diameter...one was almost 1cm in diameter and they were about 15cm long where they broke off in the ground...yup, the plant was shocked but has recovered nicely now...
and.....the containers that do not have holes in the bottom of the containers are now very rootbound and the plants are not producing because of that...but you have to remember, my superhots that are rootbound have been in those containers for about 9 months now...so it was either go to larger containers (cost prohibitive for 300 plants) or just bury the containers...
After my plants take off i will cut the bottoms off and plant them in the ground. One would think that plants would love a bigger area to stretch their "legs".
