we are doing some remodeling to our house,on one of our may trips to lowes we brought home some concord grape plants. this may be a dumb question,but we have a archway that was built for our wedding. my dad build it so it is pretty unbreakable! what im wondering is,it is taller than it is wider.all the arbors i see for grapes are wider on the top. this arch is probably 8 feet tall and 4 feet wide. will this work for growing 2 grape plants,or do i need something shorter and wider?