Hi there-- I would like to frame a narrow walkway with two camellias, one on either side, and train them to form a fairly informal low arch through which one can pass. I'd like them to be relatively fast growing, and white. Since I live on the colder edge of Zone 7 I have been looking at sasanquas and the cold hardy hybrids. So far I have thought about 'Mine no yuki' (sasanqua and the hybrid 'Winter's snowman.' The bushes would have to be planted fairly close together- say, 6 feet-- so I was worried that "Mine' might be too spreading. Anyone have any recommendations? Thanks! Hobbes