Interesting subject. I have horses and we have 3 compost 'bins' made of pallets. Despite research, it doesn't break down that well (I think we should be turning it - impossible in a cubic pallet size box!). So although its from last year (the newest is August 19), I wasn't sure if it was OK to use. Its a bit dry and still looks like horse poo instead of a nice fine peaty looking crumble like you see in pictures. From what you are all saying I should go ahead and spread it now? Any plants which won't like it and I should avoid?
Please be aware that a weed killer for grass fields that are grown for horse hay feed are sprayed with a chemical named aminopyralid. This weed killer is not broken down in the horse's gut but passes through and into the manure that you may be spreading on your land. Aminopyralids are only broken down after contact with soil and may take a year or even longer to completely be broken down. Any plants coming in contact with aminopyralids will be stunted and distorted. If you need to know more, Charles Dowding, a commercial organic grower has vids on youtube showing his destroyed crop, after spreading horse manure that he got from a neighbouring farmer.
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Spread it to a depth of 1 to 2 inches NOW and let nature work for you.
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Keep a note of what you do so you will know for next Winter.
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