yes, so i added horizontal supports that can be adjusted to the height of the plants.,

i took electrical conduit and cut it so it reached from one post to the other (51 inches) then flattened both ends

Than i drilled a hole in the flat spots on both ends of the piece i cut. I then zip tied the new supports to the back left and right walls. Since they are on zip ties, just dont tighten all the way and they can be adjusted up and down. Does that make sense.

the conduit is like 1.50 for 10' at HD.