I, too, grow both Kwanzo and Variegated Kwanzo. I like both of them. Both have grown successfully under pine trees on a south facing slope for 25 years. The shade and the dry soil doesn't seem to stop them from blooming well. I moved some fans of Kwanzo into the fenced back yard, and it is tough enough to withstand my two male dogs lifting their legs on it occasionally. The variegated version has lovely white and green striped foliage, and it brightens up a shady location beautifully.
