Ulmus rubra
Slippery Elm

Mature Height: 50-135'     Longevity: 300 years

2-8 Water Range
Soil moisture tolerated by tree

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

DEFENSE     Soil Moisture Key
2: "Mid" drought tolerance listed. References indicate can grow on drier uplands. Not mentioned in driest sites.

8: Tolerates some flooding but not frequent or prolonged flooding.

DEFENSE (from Distribution Maps)
National Audubon Society (NAS) Map: (NORTH) Solid Z3. (SOUTH) Solid Z8.

Peterson Field Guide (PFG) Map: Same as NAS.

6   Sun Strength

7   Shade Strength

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

Click here for Key
6 = slightly < rapid
0 = Not pioneer
-.2 = 1 Major & 1 Minor
0 = ???
0 = No
0 = 60'
+.1 = 135'

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

Click here for Key
7 = Tolerant
+.3 = Climax Capable
-.2 = 1 Major & 1 Minor
0 = ???
0 = No
0 = 60'
0 = 300 years

TOTAL SCORE (5.9): Growth appears to be slighlty less than rapid. Occurrence on few soil orders reduces score.

TOTAL SCORE (7.1): Shade tolerant tree.

2   Fire Strength

3   Wind Strength

DEFENSE
Base Score: None-Low (Big Tree) = 2-3
Rating is lower than Ulmus americana since tree is much shorter lived and generally smaller in stature.
Final Value = 2

DEFENSE
Base Score: ???
Little information on wind tolerance prevents the assignment of a higher rating.
Final Value = 3