> Just read a new tip for adding calcium to the soil > Add 1 stick of chalkboard chalk in the soil, to each plant. The chalk should last a while. Was told by a high school chemistry teacher that the only difference between chalk and Tums is the binder. Tums uses talc, chalk uses clay. To prove it he bit into a piece of chalkboard chalk, and spent the rest of the day picking impacted clay out of his teeth. Scott... KCK