I've got this string of hearts that's I've had for about a year! I love her and I was thrilled when she started shooting pink leaves. My only problem is that she's not shootint any leaves closer to the top of her pot (she's bald up there, poor lady) and I was wondering if there's anything I can do to encourage leaf growth at the top? She's in succulent soil, very well drained, and hung up in a window that gets a lot light during the day. She's growing very, very long and I give her some liquid fertilizer during the spring.