I transplanted some tea olives from my mother's garden to my own home*when she passed this year. They were in a shade garden and are quite spindly and pathetic looking, but are now in full sun.*I would like to cut them back to promote as much lateral growth as possible and fill them out, but I'm not sure how*MUCH or even how TO cut them without killing them. They are about 6-7 years old I would guess, one being about 6 feet tall and the other two at around 4 feet tall.*I am NOT a gardener and am attempting to learn as much as possible now that I have to tend hers. Please help!!