We have just cleared an area at the end of our garden which had been left to run wild for about 15 years, the plan being to make a new veg garden with raised beds on the area we have cleared. However, patches of nettles are alreadygrowing through which I would like to leave as they make great liquid fertilizer & are good for the ladybirds. My husband, however, wants to use weedkiller to kill them off before we put the beds on top as he says they will come up through the raised beds and take over. I am releuctant because of the insects & wanting to grow food crops organically. Anybody any advice?