Some (plastic) pant pots have their holes on the side but some other have it below so when I put them on a tray the hole doesn't get any air. I've made a couple of pots from buckets I got from the dollar shop and burned a hole on their bottom so again they don't really get ventilation from the hole. Is this alright or should I place the pots in such a way that they do get such ventilation? Thanks.