Inspect your plants for insects and mites. Look at all parts of your plant including the growth tip, at left, which is at the very top of the stem where new leaves are emerging, and the leaf joint, shown at right. (The white spots on the jade leaves are pores, not disease.) Photo by Connie Oswald Stofko If your houseplants have been vacationing outside, don’t let them stay out too long. When should you bring them in? Before you turn…