beginnings of a Food Forest

We've been rather busy over the last few weeks with lots of planting in our orchard, filling in the gaps and hoping to create an edible forest - a Permaculture Food Forest is our aim. There is still far too much grass for our likeing and we will soon be fixing that. As well as another bunch of beautiful heirloom varieties, we have been adding in Kowhai, a native with a very attractive yellow flower and the very useful attribute of being a nitrogen-fixing, slender, lacy tree (will still let in lots of light) and are about to add small tagasaste(tree lucerne) plants, which also fix nitrogen from the air into the soil. Even more amazingly as we found out this effect is increased as we 'chop and drop' the trimmings/prunings where they fall as mulch, as the plants then release nitrogen from their root systems to compensate for being pruned! Cool! Clever Mother Nature - we love her! For our lower layer we've ordered loads of kumara plants, which will grow as a thick ground cover and we have an excess of tiny strawberry plants - they may like to ramble around under the trees?