Hello. I am looking for help on planting a small perennial garden that will bloom from spring to fall. We live in Zone 5 and the flowers will be subject to full sun. The area we are looking to plant is a small 3x10 space. The area if flat and does not lie against anything (meaning tall plants are out). The space does not come to touch the stairs or a wall or anything. Just think of a small flat piece of land looking for some flowers. That being said, I am wondering what types of plants and how many (I am a new gardener and do not know anything about spacing, spread, etc for a 3x10 area). Any plans/design ideas/help would be greatly appreciated. Thanks!