Seasonal Bloom Chart Species June July August September Hawthorns(Crataegus sp.) Geraniums(Geranium sp.) Weigela(Weigela sp.) Deutzia(Deutzia sp.) Buckeyes(Aesculus spp.) Camass lilies(Camassia spp.) Bearded & Siberian iris(Iris) Speedwell (Veronica spp.) Meadowrue(Thalictrum spp.) Elderberry(Sambucus spp.) Meadow sage & other salvias(Salvia sp.) Catmint(Nepeta spp.) Peonies(Paeonia sp.) Roses(Rosa sp.) Clematis(Clematis sp.) Spotted deadnettle(Lamium maculatum) Coral bells(Heuchera sp.) False Goatsbeard(Astilbe sp.) Fringe Tree(Chionanthus sp.) Sedums(Sedum sp.) Wisteria(Wisteria sp.) Hydrangea arborescens & anomala Black-eyed Susan(Rudbeckias sp.) Ornamental grasses & sedges Daylilies(Hemerocallis sp.) Coneflowers(Echinacea sp.) Waterlilies(Nymphaea spp.) Lilies(Lilium sp.) Hosta(Hosta sp.) Milkweeds(Asclepias sp.) Butterfly Bush(Buddleja sp.) Sneezeweed(Helenium sp.) Beebalm(Monarda sp.) Hollyhocks(Alcea rosea) Bugbane(Cimicifuga sp.) Joe-pye-weed (Eupatorium sp.) Sunflowers(Helianthus sp.) Monkshood(Aconitum sp.) Species June July August September Check out the Garden's seasonal bloom highlights. Download our free smartphone app to locate plants when you visit.