Thanks Nikki for your response but I wonder, if Yarrow is so potent, why has not some agricultural chemist identified the chemicals, synthesised them and made a fortune?
Yarrow Chemical Content
Certified GKH Gardening Expert
Actually, there are some products on the market, such as Q.R. Compost Activator (made in England by Chase Organics), that contain yarrow. This plant also has a long history of use in herbal medicine.
Ni Nikki, thanks again for the info and "introducing" me to Chase Organics, their web site is great. I collected a sack of yarrow yesterday, chopped and added to my current half built compost heap, Today's task is to cover it with some old compost and water the pile with undiluted kelp seaweed and comfrey brew. I completed an Organic Horticulture certificate two years ago as I had to change my gardens to No Dig as a heart attack has robed me of the ability to dig and I needed to expand my organic know how. The WWW has been great but it is the practical advice from organic gardeners like yourself which is the greatest source of help. Task 2 for today is to collect more seaweed to dry out before chopping in my mulcher and soaking some in a sack in liquid manure bin #2 and mulching my tomatoes with the rest as I find the slow release of seaweed constituents keeps most of the bugs away. Thanks again for the help,