I have not experimented, but what I found when researching correcting micronutrient deficiencies was a suggestion to dissolve 1 tablespoon of 20 Mule Team Borax in a gallon of water and sprinkle that on a 100 square foot area. That was supposed to last for three years, it was a fine line with too much being a very bad thing.
Do your own research though, my boron results were middle of the road so I didn't do anything with it.
|