I used to live in the mountains and July is a few weeks too late bromigo. Your plants should be established with a decent root structure by July. Of course it really all just depends on a multitude of different variables like the strain, your location, the season, etc.. but you can try and grow a few to see how it goes. Truth is, your probably not that familiar with growing cannabis, right? So why not try and grow a few this season and take a few notes. Then next may, start your seeds inside. Grow them tell june, then plant them and you'll get some big plants come late summer
You mentioned that you cleared 500 trees, are your goals to mass produce, or are you just lookin to grow a couple plants?
What strain do you got, if you dont mind sharing?
...oh, and btw, I got lots of tips for mountain growing if you got questions