Hello need help with a short strain

Hi I live in the US, and naturally I want to use attitude or Nirvana seedbank.
However I have just started a Diy stealth grow box thats only 18" tall and am looking for a strain to grow in it that is not gonna overgrow my box and be an autoflower strain.
The 3 I have looked at are:

dutch taiga 50-60cm
LR #2 16-20 inches
Afghan Kush Ryder 40-80cm

I liked the automatic hindu kush but no one who ships to the us and is trustworthy has stock??

Any ideas????

Thanks any help is greatly appreciated.

Also thinking of getting magnetic hooks so I could do one of the above strains if it got out of control.

Jon

id roll with nirvana they are abit more stelthy.. attutde is a good bank too with out a doubt.. im not sure if you wanted an auto flo or not your post is a bit murkey on that... the Lowrider is a good strain or northern lights #5 maybe..with those space limets you dont have alot of options.. youll have to start a 12/12 light cycle as soon as your lil ladys have a couple sets of leafs and good roots to finish a crop in that space. alot of strains will double in size during flowering. also dont bother with the magnetic hooks a lil fishing line will do the trick just fine pry a couple bucks cheeper too.