Large colorful trusses of fragrant flowers attract butterflies -- big time! Buddleia is a shrub but in cold-winter zones, treat it like a perennial. Prune back to live wood in spring (often nearly to the ground); in south, prune to two feet. Great choice for quick height this season topped with showy blooms from midsummer into autumn. If you are not sure which one to try, I recommend �Adonis Blue� � bloomed like crazy here last summer!