"Len Case" wrote ...
Hi Bob Thanks for the reply,,,,,,,I have been giving a full watering can of
water for every 3 plants and I thought that might be right unless
you tell me otherwise, and I leave one window open all the time, but as
you
say it has been hot this year so I will open the other window and
leave the door open half and hope that cures the prob.

Sounds adequate to me so the temperature is obviously the key.
This is where automatic vents are worth their money. I personally would have
both windows with automatic vents and some louvers near the floor at the
opposite end to the door also with an automatic louver vent.
Opening the door is OK but if you close it at night the temp can go up
alarmingly before you get out of bed of a summers morning, seen my old Mums
greenhouse get to 120°F by 8am (but she grew cacti).

--
Regards
Bob Hobden
just W. of London