Nyssa sylvatica ‘Green Gable’ Black Gum, Tupelo Description With a tight pyramidal form and uniform branching, Green Gables is a terrific improvement on our native tupelo. The fiery red fall color is a show stopper and pollinators love the inconspicuous flowers. Tolerant of wet sites. Good for rain gardens. Sizes & Prices All Black Gum Characteristics Hardiness Zone: 4 Light requirements: Sun/Part Sun Height: 30-40' Spread: 15-25' Native: Yes Sizes & Prices Size: 7 GALLON $179.98 Other Information Black or Sour Gum Nyssa sylvatica Zone: 3 Sun/Part Shade HT: 30'-50' Black Gum, Tupelo Nyssa sylvatica 'Green Gable' Zone: 4 Sun/Part Sun HT: 30-40'