For Autumn

Channel. This is used to attach the plastic to the greenhouse.

This is wiggle wire. It is used to hold the greenhouse plastic in the channel.

Autumn, I just bought regular cattle panels. They are 50 in. tall and 16 feet long. I used T-posts along the sides. The arch is about 6 1/2 feet wide. You can buy as many cattle panels as you want to make the greenhouse as long as you want it. Mine is 6 cattle panels long.

I bought my plastic from Farm Tek. I also bought the channels and wiggle wire there as well. I will post a picture if I can so you know what I am talking about.

http://www.farmtek.com/farm/supplies/prod1;;pg102197_102198.html

I strongly suggest spending the little extra to buy the channel and wiggle wire as well as the greenhouse plastic. The first year or two I used cheap plastic from Wal Mart and Lowes and had to replace it every four months. It would just disintegrate.