Mate, what a great attitude you have towards education of your kids. I salute you Sir
I have two daughters, 15 and just 18. I sat down with them a while ago to tell them I SMOKE weed. They both said "no shit dad" so that was easy. Then I had a couple of long chats with them about weed, alcohol and drugs in general. I was pretty darn honest with them and explained that I have literally tried pretty much everything, and told them all about my experiences. Made sure to be honest and open, about my experiences and the experience of friends and people around me. Education is the only way in my opinion. Trying to control them isn't gonna work, as proved by me as a kid!
As far as GROWING goes, I recently told them there was something I needed to show them upstairs. Half way up to the bedroom my 15 year old daughter said "have you got a weed plant? My friends dad has one on the window c......" then she saw the tent! Lol. Don't think they were expecting quite such a serious set up!
I explained to them how I have tried many pharmaceuticals over the years to combat depression and anxiety, and that none of them worked and some made me feel high, among other things. Then I explained that to a large extent I can control my "issues" with the right weed. Then explained I grow it so I can control what I smoke. I also explained that the actual growing bit is also very therapeutic for me.
They were absolutely awesome about it. Asked loads of questions etc and we talked about it for a while. They have no issue with it, other than a slight issue over the illegality.
One of them asked for weed as what she gets is shite!