would he swop his 2 plots (4 and 5) for yours ? then he could have all his plots together. i know it would be a lot of work to start again but might be worth it if it means your away from him. not this season but maybe in the autumn.
dont know where you are or if this is any help, but ive used these for a couple of years and have had no probs. http://www.boxfreshorganics.co.uk/ only recently stoped due to money being tight. hope my veg do ok this year as the supermarket stuff is so tasteless. we also seem to go shopping most day...