Do you HAVE to glue it together?

[Ron]

I don't glue sections together in my larger gardens. I never glue the over flow pipe. But if you don't glue the tees with the bottles, the weight of the plants will eventually make the bottle and plant fall over and if you have a few of these falling left and right then you got a mess on your hands. If you built a cradle to hold them up then it might work.
Ron