50/60% humidity/raising to 70 after watering,drops back down a couple of days after watering(i only water/feed every 5 days).the soil is a multi purpose ph balanced compost with prelite called dunstables multi purpose(a uk brand(pretty crap but my plants are ok!) i found out that the soil has probably got peat in it so i've been adding bone meal to raise the ph (its at 6 now).cheers stinky i'll check it out;-)