Hi Biscombe. I'm trying them for the first time this year. The botanical name is Ipomoea Alba. I find Ipomoeas in general grow very easily here in London and I treat them as hardy annuals rather than half-hardy annuals, and simply throw a good pinch of them on the sunny border where I want them to grow! They often self-seed too. As far as I know they are not too fussy about soil type.
G x
