I couldn't find a lot of info on here about forest gardens so i thought i would share some work we have been doing here at Permaship 
  You can find general info about food forest by following the below link   
https://sites.google.com/site/permaship1/permaculture-practice/gardening-and-food/food-forest-concept  or go and see our initial phase of creating a  forest garden from this link below  
https://sites.google.com/site/permaship1/permaculture-practice/gardening-and-food/food-forest-concept/permaship-forest-garden  I am thinking of introducing some Paulownia Trees into our site under storied with hazels and truffles under them ,if anyone has any experience with growing paulownia i would love to hear about it.   
 Cheers  
 Paul
 Permaship Team    
https://sites.google.com/site/permaship1/Home