I`m undecided whether to plant the top of the cylinder (+50sqft) or add an inner cylinder 5ft diameter x 6.5ft high (+102sqft).
I like the idea of using two circular walls with an 18" cavity.. planted on both sides
Access will be an issue whichever way i go. The nozzle manifold is exactly the same so i`ll install the main 8ft cylinder and decide afterwards.
To put it into perspective the greenhouse has 154sqft of floor area.The vertical gives me 163sqft (outer only), 213sqft (outer+ top) or 265sqft (2 walls + cavity) and i still have plenty of path space