boron is called a "trace" or "micro" element ...plants need it, but only in very small amounts .....it is added to *some* fertilizers in very small amounts -
boron is necessary for healthy bud development & healthy flowering ...and if the plant is "old enough", aids in seed & pod development
browning flower buds could be a couple of things:
- heavy use of insecticides
- a nutritional problem - like zero boron is available to the roots
- not enough watering during hot spells
- buds getting too wet
if using "heavy neem oil" ....neem oil left on developing buds and not washed off - might also cause browning buds
