Looks like you are doing a good job of it and your plants are liking where they are growing.
I think when you have 3 prongs at year 3, and some producing berries at that point - that is a sure sign that the location is good.
I have had that at some of my locations, but at others they have just not done as well - still mostly small 2 prongs at year 4. I think that is a sure sign that the location is just not going to pay off.
I would stick with he wild sim (myself)... that cultivated is sure looking quite carrot like and no doubt that is going to impact the price quite a bit.
Looks like you are on the right track to me. Good Luck !
TNhunter