I've even been putting a half a hand full of pellets in my large container plants outside.
It takes a while for them to completely break down, and nothing's burned yet..
Wish I would have known about how great Alfalfa pellets were a long time ago...
I've been using Tractor Supply's
Standlee Premium Western Forage Premium Alfalfa Pellets, 40 lb. Bag
They are always on sale, and 100% Alfalfa....