When i saw the title of this thread reminded me of what i used to do when i only had the one greenhouse and thought it may be of help to others.
I would find out and take note of what Tomato,s grew short leaves, what crop i got and the flavor of the tomato,s. Not so i could cram more in but to improve on the ventilation around the plant.
Alas i must confess i crammed more in.