I have last year moved to another allotment which required a lot of tidying. I have 25% of the plot used for fruit but in a moment of madness decided to put a membrane down and approx. 75-100mm of bark on top. Now I have found myself in a bit of bother with how do I feed the tree's and bushes. It looks like I should scatter sulphate of potash but it seems I need a soluble type of food. Can there be such a thing to feed the fruit or what about comfry leaves left to rot down and dilute with water. Any ideas would be very much appreciated. thanks jock-edin