Four-o'clocks, Mirabilis jalapa, are great night bloomers. The bushy plant will open its tubular 2 inch flowers in late afternoon to early evening and fill the garden with sweet perfume. They grow best from seed in full sun after danger of frost is past.
Purple Shamrock - Best in shade as front-of-bed edging or ringing a shade shrub such as hydrangeas or rhododendrons. Also nice in a shady flower pot. Companion plants: Under Ferns, Cimicifuga or Variegated Solomon’s Seal.
Plants for shade: common cowslip (Primula veris). Rich yellow, fragranced flowers emerge in spring. Grow it in partial shade or try planting it up with anemone for a shade-suited container. Here's how http://www.gardenersworld.com/plants/pots-containers/spring/primula-and-anemone-pot-display/1196.html
Crape Myrtle, Princess Kylie (Lagerstroemia) A brilliant choice for growing as a low edge or adding electric color to the perennial garden in summer, Princess Kylie crape myrtle offers bold magenta-pink flowers all summer and autumn. Its dwarf habit makes it easy to use in garden and landscape designs. 3' x 3'