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Sour Gum, Blackgum, Tupelo, Pepperidge 'Forum'

Nyssa sylvatica

Family: Nyssaceae
Genus: Nyssa (NY-suh) (Info)
Species: sylvatica (sil-VAT-ee-kuh) (Info)
Cultivar: Forum
Additional cultivar information:(aka NXSX, Forum)



Foliage Color:

Unknown - Tell us

Bloom Characteristics:

Unknown - Tell us

Water Requirements:

Requires consistently moist soil; do not let dry out between waterings

Where to Grow:

Unknown - Tell us


over 40 ft. (12 m)


over 40 ft. (12 m)


USDA Zone 5a: to -28.8 C (-20 F)

USDA Zone 5b: to -26.1 C (-15 F)

USDA Zone 6a: to -23.3 C (-10 F)

USDA Zone 6b: to -20.5 C (-5 F)

USDA Zone 7a: to -17.7 C (0 F)

USDA Zone 7b: to -14.9 C (5 F)

USDA Zone 8a: to -12.2 C (10 F)

USDA Zone 8b: to -9.4 C (15 F)

USDA Zone 9a: to -6.6 C (20 F)

USDA Zone 9b: to -3.8 C (25 F)

Sun Exposure:

Full Sun



Bloom Color:

Chartreuse (Yellow-Green)

Pale Green

Bloom Time:

Mid Spring

Late Spring/Early Summer


Grown for foliage


Other details:

Unknown - Tell us

Soil pH requirements:

5.6 to 6.0 (acidic)

Patent Information:

Unknown - Tell us

Propagation Methods:

From herbaceous stem cuttings

From woody stem cuttings

From seed; direct sow outdoors in fall

From seed; winter sow in vented containers, coldframe or unheated greenhouse

From seed; stratify if sowing indoors

Seed Collecting:

Remove fleshy coating on seeds before storing

Properly cleaned, seed can be successfully stored


This plant has been said to grow in the following regions:

Alexandria, Virginia

Gardeners' Notes:

No details have been posted.