Everyone should try this nut to get a real feel for what bitter is! I have read that squirrels don’t like this bitter fruit, but I believe the squirrels never read those articles because I am always in direct competition with them when I collect the seed. A ... lso called Yellow Bud for its highly conspicuous yellow buds in the winter. In youth, Bitternut is shade-tolerant but becomes intolerant with age. Should be grown in half-day sun. Yellow fall color. This is the fastest growing hickory we carry at 16-24 inches per year.