HI im looking for bluish foliage plants --i already know hostas -little bluestem grass-some other grasses--rue which is poisonous-- and of course blue spruce of which some are powder blue-- very very blue---i would really appreciate some feedback as i have been looking fairly fruitlessly--pleeeezzzz
There are some Poppy that have wonderful large blue green foliage, then you have Lavenders, greyish foliage and there is Alchemillae, Eucalyptus, Salvia, Santolina, Zauschneria, Sedams, all have blueish/silvery foliage, but again they look better depending what they grow beside, and the colour of the flowers will show up better on some than others, hope this gets you started off and you can enjoy your garden. WeeNel.
Dianthus has a pretty bluish foliage (and lots of pretty color flowers to choose from!) There's also a beautiful blue cedar. My hubby loves cedar so I bought him one three years ago and it's now about 12 to 13 feet tall and filled out so pretty--he just loves it. And of course, birds love evergreens for cover during nasty weather.
Blue star Juniper is one of my favourites. It is slow growing, doesn't outgrow its spot and always maintains an awesome blue colour. Blue atlas Cedar is gorgeous and comes in a beautiful weeping form as well. I have seen the weeping form trained so that the trunk is S shaped. Of course, all of these need full sun.