I have been offered a half size allotment nearer to my home than the one I am currently sharing with a friend I don't anticipate having much of a harvest there next year as it is going to be a case of clearing and conditioning the soil - it has been neglected for several years. Whilst I was surveying the site yesterday I noticed the previous holder had a row of comfrey growing at the back. I think I read somewhere that it is supposed to be good for soil conditioning. Can anyone please tell me how and when it is used. Does it need to be left and allowed to rejuvenate year after year or is it to be re-sown or something.