Jefferson believed birds and insects were "indexes of climate" revealing "the advance of the spring." In 1806 he wrote, "I have noted…the access and recess of frost, flowering and leafing plants, ripening of the cultivated fruits, arrival of birds and some insects." The following collection contains flowers that attract essential pollinators such as hummingbirds, butterflies, and honeybees. Sample includes: Black Hollyhock, Texas Sage, Butterfly Weed, Spider Flower, Purple Coneflower, Blanket Flower, and Foxglove.