sounds like CO temps where I am.
You have quite a few strains up there. What do you see that really thrives in those temps? I find Skunks and Afghans do well up here at 9400 feet with cold nights. ( I use a wood stove to buy me more finish time in the Fall here). I would guess I have lower rH here compared to your region though.
And surprisingly AK-47 strains do very well. The Kush strains do OK but stay squatty and yield low.
Honestly brother, we haven't had a strain in the greenhouse we weren't able to pull off. Last year there was 32 strains.
Let's see how many I can remember:
Pineapple express
maui
sour cream
ice cool
Lambsbreath
sour diesel
og kush
Chemdog 91
purple wreck (beans from Ole Timer)
BRAK, bubba o x romulan x ak (beans from ole timer)
bubba kush
mendo purps blah
blue dream
ace of spades
qrazy train
cheese quake
cannatonic
kushberry
la blanca
sour ak
grape romulan
that's what is off the top of my head anyways. (we travel all over nor cal looking for genes)
Usually potency is the ultimate cause of keepers, however, we do keep some for flavor too. We have yet to do any real hardcore landrace sativas though. ie. columbians, alcapoulcos, laos, etc. They are usually some form of hybrid. Currently our maturation times are extended because we are broke and gas costs abit to keep the heater system running, so the girls are from their optimum night temps, then to compound as these things usually do, as they run longer into the year, as you know the light gets weaker, and again we are increasing our maturation times. Last year Sour D didn't come down until 11/24. We are trying to get into more exotics, and unusuals however, getting tired of the top 40 lol... we just gotta be able to sustain the night temps.
Man 9000'...that is really up there . Interesting, I would've expected the kush's to do well at such an environment. Lot's of leaf and squatyness, (helping the plant deal with cold temps). Are you able to keep your soil temps up? Pineapple express and blue dream and maui we have rocked up here for 4 or 5 years, and they are always hearty.