We have a horse ranch close by and the manure is free and checks out to be free of chemicals so we put it on our garden last spring. Everything grew real well.
The marigolds we planted along the outside border of the garden grew to over 7 foot tall and bloomed prolifically.
Our tomato plants, however, were short, produced abundant tomatoes, and then just stopped producing but still produced leaves and were healthy plants.
I later learned that tomatoes don't like a lot of nitrogen, and horse manure is high in nitrogen. Is there anything I can counteract the nitrogen with? for next year.