Rasta Roy
Well-Known Member
Langbeinite has been great for me for staving off mag deficiency in a few different soil mediums. And I use half the application rate. Lasts for about four months.Personal endorsement: My plants love calcined clay! (Special Kitty all natural from wal-mart)
RM3 turned me onto it a couple of years ago and it is fantastic. We put 100 lbs in our garden and had a stellar crop (10ft sunflowers, giant zucchini, etc). I've had problems with mag deficiency, but I think that's from the coco in my mix.