Xorkoth, I think kratom is pretty hard to get going from seed, so you'd be better trying a cutting. If you can get a hothouse, just a simple plastic thingy; that should negate the effects of frost, and wth careful watering, create a 'tropical' climate for your tree...I grew salvia in winter in Melbourne with a lot of care and a lot of making sure drunked louts didn't try and smoke them...the hothouse was almost too hot I feel, some leaves browned at the edges probably from water-magnifying-heat. I think kratom likes a lot of water, or can tolerate it so...Whats your climate like, as in are the seasons extreme of what?