I'm still trying to work out details of my upcoming grow project and am still pondering the subject of cross pollination. I'm gonna have 100 - 150 plants in pots and my space is limited which brings up another question. If kept in a greenhouse is crossing a problem? What if multiple varities are kept in a greenhouse together are they safe? Also I've heard that in greenhouse grows pollination is a problem is that true? Is there someone out there with greenhouse experience that can shine light on this for me? Also if kept in a greenhouse what are some other considerations I need to consider?