Fraxinus pennsylvanica
Green Ash

Mature Height: 50-145'     Longevity: 175 years

 Fraxinus pennsylvanica leaf. Fraxinus pennsylvanica art.
   

2-9 Water Range
Soil moisture tolerated by tree

3-8 Temperature Range
Hardiness Zones in which tree naturally occurs.

DEFENSE     Soil Moisture Key
2: Most references indicate tree has at least moderate drought tolerance & can tolerate fairly dry and nutrient poor sites.

9: Tree has moderate to high flood tolerance. Couple of sources indicate occurrence in swamps. Silvics Manual indicates tree can tolerate inundation of 40% of growing season.

DEFENSE (from Distribution Maps)
National Audubon Society (NAS) Map: (NORTH) Solid Z3. (SOUTH) Solid Z8 w/ some occurrence in Z9 in TX & LA

Peterson Field Guide (PFG) Map: (NORTH) Solid Z3 w/ some Z2 where Z2 dips into Z3. Solid Z8 w/ good limited presence in Z9 in TX & LA. Possibly could assign a 9 but intrusion into Z9 is very limited.


   

7   Sun Strength

6   Shade Strength

DEFENSE
Growth Rate:
Succession:
Soil Range:
Salt Tol.:
Allelopath:
Avg Height:
Max Height:

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6.5 = Rapid
+.3 = Pioneer Capable
-.2 = 1 Major & 1 Minor
+.2 = Moderate
0 = No
0 = 65'
+.1 = 145'

DEFENSE
Shade Tol.:
Succession:
Soil Range:
Salt Tol.:
Allelopath:
Avg Height:
Longevity:

Click here for Key
6 = Intermediate-Tolerant
0 = Pioneer Capable
-.2 = 1 Major & 1 Minor
+.2 = Moderate
0 = No
0 = 65'
-.1 = 175

TOTAL SCORE (6.9): Rapid growing tree that can pioneer effectively.

TOTAL SCORE (5.9): Short lived but can withstand understory conditions for years.


   

3   Fire Strength

3   Wind Strength

DEFENSE
Base Score: low (Big Tree) = 3
Thin bark & shallow roots doom tree to poor fire rating. Short lived but rapid growing. Concensus "low" rating by literature.
Final Value = 3

DEFENSE
Base Score: ???
Mixed reports on wood strength. Some identify as strong while others report as susceptible to breakage. Tree is susceptible to many diseases & pests so even minor injuries could lead to potential mortality. Also trunk diameters appear to be thinner than some other trees of similar height Will assign low moderate value.
Final Value = 3