Ask a naturalist: Which kinds of trees make which color leaves?
Different tree species are associated with different colors. Hickory and sycamore leaves are golden-orange. Ash leaves tend to be yellow and purple. Oaks hold onto their leaves the longest and produce russet-brown foliage. Sugar maples take on an orange or red tone. There is evidence that red leaves are more prevalent when days are warm, dry and sunny, and the nights are cool (but not freezing). Red foliage has also been linked to fungus and drought.