Another horse manure question

[gone 2 seed]

I have a friend with horses that said I could get all the manure I wanted but she cautioned the year she used it in her garden it was over run with chickweeds. From the horses eating the weeds and it coming through into the manure. Has anyone else ever heard about this or had the same problem?

 

[nightshade]

there are many seeds that horses do not break down all they way, so they pass right through and produce some not wanted plants in your gardens. I good tip to stop this is to make sure the manure you use on your beds has sat at least one growng season so that any unwanted that are going to sprout and grow do it in your compost pile or your neighbors manure pile not your garden.