If you could choose just one hardy geranium which would it be geranium wallichianum 39havana blues39 has to be a strong contender first of all it has those gorgeous five45petal flowers blue45mauve at the edges and white at the centre streaked with fine deep purple lines and it blooms for months on end second it grows happily in difficult places in sun or shade and third it39s so easy to grow that it needs hardly any attention at all so this cranesbill is just right for