And I do. In my current grow, all pots used including Root Beer Float. Are all 3 year old no till Happy Frog that I ammend for each grow. Diatomaceous Earth is part of the program.
I will humbly disagree that DE is not a good source of nutrients. DE has been studied, and it is becoming well know and accepted that DE has available Silica for almost immediate uptake for plants upon watering. In fact DE has an available 3% magnesium, 33% silicon, 19% calcium, 5% sodium, 2% iron, many other available trace minerals such as manganese, boron, and copper. It does work wonders organically as I seldom have needed supplements like CalMag to complete a grow cycle. I have read studies where DE has a significant effect on growth, and overall plant health regardless of cultivation methods. Studies of the like have found increased levels of magnesium, and calcium in foliage, per increased DE dosage, suggesting it's usable immediate availability.
The role of silica as a needed supplement in soilless media is gaining interest. This research studied the effects of diatomaceous earth as a supplement on growth and flower characteristics, physiology, and nutrient uptake in dahlia (Dahlia Cav. × hybrida ‘Dahlinova Montana’), black-eyed Susan...
www.mdpi.com
I've used it for years, as it is part of what I was taught to use for successful gardening. I consider it the most important part of my amendments for micro nutrient supplementation. II'll never grow without it.