I realized that calling it Si was incorrect or atleast impercise. In reading it seems silicon taken up by plants is silicic acid in the form potassium or sodium silicate. There is form of that in Meta K in which I use 1-3ml/gal throughout flower when watering.
Weird you mentioned recently foliaring with a silica product, which do you use?
Weird you mentioned recently foliaring with a silica product, which do you use?