Foliar feeding is the best way to apply ferts and raise brix level in food crops....
In ganja gardens its totally fine too....but....be aware of molds...its up to your environment and genetics to determine if is gona lead to mold problems in your garden if you do it constantly
Its sure a good way to ensure faster absorbtion and is used alot by commercial orchards farmers...
Kelp and fulvic
acid makes a good once ina while spray...