We have 6. 50% boron in our well water. What plants, trees, and shrubs can survive?
Certified GKH Gardening Expert
This is a tricky one. Boron amounts even slightly over what is necessary for plants can be toxic. However, Boron leaches easily from the root zone, especially in sandy soil and in soils with low organic matter levels. Its availability also lessens with decreasing soil moisture, and decreases in soils with pH levels above 7.0 and after recent heavy liming. Plant tolerance lists for this nutrient are few but the following resource should help: https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/boron-toxicity-symptoms.htm