anyone have their own power deep root feeder? what do you use? I'm thinking of getting a 26gal ag sprayer with 12V pump and pistol grip wand, and basically using it to inject liquid fertilizer into the root zone. something like this https://www.amazon.com/dp/B07N7JDLP2 . I have a big bag of Davey Arbor Pro that i'd dissolve into solution and add to the tank. then pump it into the ground.

anyone else have a better setup? need to get ready for spring feeding.