My neighbor has a hedge which is cut to 3 foot high. I want to plant in front of this hedge and don't know what to put there. I was thinking of salvia/asters etc*in the 30-36" height (also like russian sage) w/plants in the purple and orange color and then something in another color (white?) low.* I am not very good at visualization (matter of fact I stink at it). I would like to have flowers here but dont know what flowers. i could use some help. Every 2-3 years I plant perennials in this area and always wind up pulling them out. What a waste of money and time. I'd like to do this area once and for all.