Red Buckeye, Aesclus parviflora, is a deciduous shrub or small tree native to the Eastern United States. Grown best in full sun to part shade, Red Buckeye typically reaches 10 to 15 feet tall and wide. Red to reddish-orange flowers appear in spring and attract hummingbirds. Red Buckeye prefers moist, well-drained soils. Hot and dry weather can cause decline in leaf attractiveness. In southern climates, Red Buckeye will often defoliate by late summer.