Cymbidium old and new bulbs

[denvervet]

I live in Denver, we can't put the cyms outside in summer because its too hot, put mine out Sept. 1, nights are getting down to 40. How long should I let it stay out there and ALSO, do the old bulbs from last year bloom as well as the newer ones? I am not sure the new ones will bloom, I had problems with mold gnats this year ALL SUMMER, someone on here told me what the problem was and I fixed it. It may not bloom at all if I cant leave it outside long enough before it hits freezing, its on a protected outside porch. THANKS AS ALWAYS GUYS!