<<<<<< Not a soil grower....but I've seen other soil growers do this when the soil gets real dry....thats why I ended the post in a ? mark.....but yea, makes sense they wouldn't burn if you aren't feeding salts.
usually when soil is super dry....you pour a little in the pot and wait an hour or so to do the rest because the soil doesnt hold the water when bone dry.......everything just comes out the bottom of the pot with the quickness.