Originally Posted by Joe4d
Yarrow grows in acidic soils. Spraying herbicides is treating symptoms. Your pasture needs lime.
Thanks for the advice. I suspected as much. I think I will do a soil test to see exactly what and how much I need to add. The pasture used to be a hay field with about 30% alfalfa. The alfalfa will benefit from the lime as well. Since this is only our second season here, I think I will do a soil test to get a more precise read on what the pasture needs. I heard liming without fertilizing can make things worse. Do you know if you can mix the lime and fertilizer in one dry application?
In the meantime, I have been pulling the yarrow by hand (it is just about to flower). I also plan to mow the longer stands of grass gone to seed this weekend. I also harrow / spread the manure well in preparation for lime and fertilizer. I have been harrowing and rotational grazing, but this clearly isn't enough. We have also had quite dry weather with lots of wind, so I will have to wait for a calm day with some rain in the forecast.