Chrysanthemums

OK, final chrysanth question of the season (I hope!); average distance between plants, what d'you reckon, 1ft 1.5ft? Thanks, Jude.

Anyone grown "indoor" chrysanthemums in an unheated greenhouse?

I'm considering this (if I am not too late to order some) because an elderly neighbour is concerned that her greenhouse is unused - last year we grew tomatoes in there for her but I'm not sure I will have time to tend them  so indoor chrysnthemums might be an alternative needing a little less time.

Any pointers would be wonderful 

Indoor Chysanthemums known as Lates are a lot more  time and trouble than tomatoes.
They are grown the same as earlies up to the 5" pot size but then are moved up to a 9"
pot for the rest of the growing year. They are placed in the greenhouse around mid September for flowering November/December depending on the cultivar grown.
A close eye has to be kept on water and a feeding program also has to be kept.
Ventilation can also be a problem any damp in the autumn will cause damping
of the blooms. This just gives you a very brief outline. They can be placed in the greenhouse after the toms are out. I don't grow them just too much trouble.
Good Luck.