I have put about a dozen Asiatic Lily plants here and there around my pond in the last few years. They have all done very well but one just isn't doing like the others. I put one bulb near my back porch a couple of years ago. All my lilys tend to grow a couple of feet tall max but this one is at over five feet now. Not only that but it's bloomed three times. The first flowers are orange then a couple weeks later I looked and there are more stems with pink flowers. Yesterday I looked and even more stems are coming up with white flowers... What's up?