Good Day DGC,
I have a great Silicon supplement for plants, Horsetail. It is high in Silicon, Selenium, Calcium, magnesium, Iron, Phosphorus and Potassium. Horsetail tea is also good as a foliar spray for powdery mildew and many other things.
Horsetail tea can also be consumed for its health benefits. Osteoporosis, eczemas, Macular Degeneration, and many intestinal issues, plus many more.
1 cup fresh horsetail, 3 cups of water, bring to boil and let sit overnight, strain threw peas pudding bag (maybe a little to newfie lol) or pillow cast and squeeze. Bottle it up and use 20ml per gallon.
Dank day to all