WHERE did you get that recipe ?? Have you figured the cost for a gallon of it ? Sounds like too much unless you own an herbal store ! Seriously, how much ?
Well, not exactly sure but I came a crossed it researching organic gardening about 4-5 years ago. At lease thats how long I have been using it in the garden.
I pay around $55 for it all which I can do about 15 gal. or so. Thats about $4 a gal.
You can buy ed rosenthal zero tolerance witch is about $130 for a QT.