Question
What plants/flowers are known to most attract butterflies? Thanks!

Answer
Coneflowers (Echinacea sp.), New Jersey Tea (Ceanothus americana), Butterfly Bushes (Buddleia sp.), Milkweed (Asclepias sp.), Common Sunflower (Helianthus annuus), Verbena bonariensis and many other plants provide food for butterfly larva.  You will find lots more information at http://www.thebutterflysite.com/gardening.shtml