i took over a very neglected allotment 4 yrs ago. It was also the worst plot on the site. clay,shallow soil, loads of stones and thick in rubbish and weeds; but the only one available so I took it on.
I cleared as much rubbish (old bits of plastic, carpets, wood, broken tools and even soem metal and glass!) and stamped or cut as many weeds as possible.
I then covered almost the entire plot in thick cardboard - old packing boxes which you can ofter get on Feecycle. I then began to work in a systematic way to clear an area at a time having first drawn a plan of what would go where.
I took over mine in early Autumn and so was able to clear the first patch for onions, shalots & garlic. Next the perenial fruit, strawberry bed, Raspberry canes etc. and rhubarb.
All this time the weeds were dying under the cardboard and enriching the soil. Until I was at the stage when I dug straight through the rooting carboard and dug out the worst pernicious weeds and burnt them.
As the soil was cleared through to the spring i replaced some of the card board having first scattered dried chicken manure and coverd with well rotted farmyard manure or soil. I also planted loads of potatoes to help break it all up.
I could then plant through carboard for many of my plants but particularly , courgetes, beens, peas, sweetcorn. This cut the back break of digging and most of my plot became a 'no dig'. year 2 were bumper years for the crops and i would do exactly the same again.
Organically - Cut all the top growth with a flame or strimmer. Then cover the whole thing in black plastic, carpet etc etc leaving a small patch so you can start digging and seeing whats in the soil and removing the roots. When you've got through the first patch of land, pull back a bit more of the plastic and start digging and so on so....
Not organically - Blast the whole lot on a still day with weed-killer and let it die-back, once again covering the lot with black plastic and repeat as above.
Trust me, I've turned over a disused allotment, all 40ft by 100ft of it, by myself, and with 2 toddlers, took me a few years but I couldn't have done it any other way. Remember black plastic/builders sheeting is reuseable and has many uses for the future.
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This google search seems to be a mine of information.
http://www.google.co.uk/webhp?sourceid=toolbar-instant&hl=en&ion=1&qscrl=1&nord=1&rlz=1T4PRFB_enGB458GB458#hl=en&gs_nf=1&cp=24&gs_id=l&xhr=t&q=how+to+clear+overgrown+allotment&pf=p&qscrl=1&nord=1&rlz=1T4PRFB_enGB458GB458&output=search&sclient=psy-ab&oq=how+to+clear+overgrown+a&aq=0&aqi=g1g-bK1g-q2&aql=&gs_l=&pbx=1&bav=on.2,or.r_gc.r_pw.r_cp.r_qf.,cf.osb&fp=f61c78776acdca7c&biw=1280&bih=557&ion=1
i took over a very neglected allotment 4 yrs ago. It was also the worst plot on the site. clay,shallow soil, loads of stones and thick in rubbish and weeds; but the only one available so I took it on.
I cleared as much rubbish (old bits of plastic, carpets, wood, broken tools and even soem metal and glass!) and stamped or cut as many weeds as possible.
I then covered almost the entire plot in thick cardboard - old packing boxes which you can ofter get on Feecycle. I then began to work in a systematic way to clear an area at a time having first drawn a plan of what would go where.
I took over mine in early Autumn and so was able to clear the first patch for onions, shalots & garlic. Next the perenial fruit, strawberry bed, Raspberry canes etc. and rhubarb.
All this time the weeds were dying under the cardboard and enriching the soil. Until I was at the stage when I dug straight through the rooting carboard and dug out the worst pernicious weeds and burnt them.
As the soil was cleared through to the spring i replaced some of the card board having first scattered dried chicken manure and coverd with well rotted farmyard manure or soil. I also planted loads of potatoes to help break it all up.
I could then plant through carboard for many of my plants but particularly , courgetes, beens, peas, sweetcorn. This cut the back break of digging and most of my plot became a 'no dig'. year 2 were bumper years for the crops and i would do exactly the same again.
Organically - Cut all the top growth with a flame or strimmer. Then cover the whole thing in black plastic, carpet etc etc leaving a small patch so you can start digging and seeing whats in the soil and removing the roots. When you've got through the first patch of land, pull back a bit more of the plastic and start digging and so on so....
Not organically - Blast the whole lot on a still day with weed-killer and let it die-back, once again covering the lot with black plastic and repeat as above.
Trust me, I've turned over a disused allotment, all 40ft by 100ft of it, by myself, and with 2 toddlers, took me a few years but I couldn't have done it any other way. Remember black plastic/builders sheeting is reuseable and has many uses for the future.
Good luck