Upside down gardening

Hi I grew some tomatoes in the upside down manner last year. It is not that practical, and is mainly a gimmick, a novelty idea, dreamt up by someone to make some money. I found that the water you apply to the buckets comes out of the bottom hole that the plant is growing out of. The dirty water runs through the plant causing moist conditions that favour mould and blight. It also makes the tomatoes dirty, so you have to wash them before you eat them. If anyone is going to try 'topsy turvy tomatoes' then water little and often to minimise the amount of drainage through the plant. Also don,t by the expensive kits, use a cheap bucket with a small hole cut in the bottom. This year i have tomatoes growing in the buckets but they are all growing out of the top, normal way up. Glenn