Hey northern guy, think what you did with the plants was perfect, the portion of stem that you put dirt over will eventually start to shoot off roots and as long as you got decent lighting close to her the streching should be minimized. Keep in mind genetics will play a role in how it grows and if it is a sativa it will want to grow tall and slender with narrow leaves, Indica will tend to be short and bushy with fat leaves. I think white rhino is a 80/20 mix Indica dominant (too lazy to look it up now).

It will seem slow at first but in 2 weeks you'll be seeing a good growth rate (it is a "weed" after all).



Now, take this with a grain of salt, but i think your sidebar approach to the ladies seems a little creepy. Just my opinion.