Also they are very vulnerable to the wind and to being blown over by unexpected gusts. It's advisable to locate them up against a wall or somewhere where you can put in bolts which hold a strap you can wrap round it to anchor it in windy weather and stop it being blown over, with all the contents inside it.
If your mini greenhouse is in a very hot spot, make sure the ventilation flat is kept fully open. You can also protect it from the worst of the sun's rays by putting a large sheet of white garden fleece over it