Posted: 02/07/2016 at 18:58
Forgot about primroses/primulas and white geraniums Mark
I have native primulas in there. They often flower all summer if the conditions are right, ie cool and wet.
I have a little piece of white geranium to put in which is a chunk taken from a bigger one. Some of the whites don't flower quite as well as the more colourful ones, but they're great ground cover, and ideal for underplanting with bulbs etc. I also have Geranium renardii in another border, which has fine purple veining and unusual foliage - quite thick and velvety.
There are quite a few white varieties, so worth checking out the best do-er to get value for money. Plants have to earn their keep in a small space.