Update: I am now left with one gorgeous female. The strain is Swiss Miss. She has pre-flowered and should be ready to pull in 2/3 more weeks. She is quite a slow developer, contrary to what was expected of her. All 3 other plants turned out to be male.

My question is when should I pull her? She is loosing a lot of her foilage to mould but in great health. Growing like mad still, she must be over 5 feet and getting to be very bushy. I hope she fills out her flowers!! She is a mainly Sativa strain and have heard that it's better to hold off as long as possible with Sativa's?

Any other advice would be great as this is my first ever attempt at growing tomatoes.