The simplest, most beautiful floral trend: rooting plants in water. All you have to do is snip a plant at the base of a leaf and place it in fresh spring water in a glass vase. I imagine this doesn't work for every kind of plant.
Blue Paradise is an ornamental grass that withstands adverse weather conditions. In summer, enjoy striking silvery blue stems that form a columnar habit, then look forward to a deep wine purple in fall.