Hi all! I've recently set up a 6 foot plastic greenhouse for my succulents. I would have preferred a glass one but as I'm renting so that wasn't an option (plus, expensive of both the greenhouse and the base). I'm now finding, as I suspected, that humidity in the greenhouse is quite high.

Does anyone have any practical suggestions for ventilation or experience growing in a plastic greenhouse particularly in the UK? I plan to set up a fan in the summer but I'm wondering if it would be a good idea to cut a hole in a section and fashion some kind of flap over it to cover when it rains.

Any suggestions would be greatly appreciated!