Quercus marilandica
Blackjack Oak

Mature Height: 20-70'     Longevity: 230 years

1-5 Water Range
Soil moisture tolerated by tree

5-8 Temperature Range
Hardiness Zones in which tree naturally occurs.

DEFENSE     Soil Moisture Key
1: "High" drought tolerance. Tree commonly found only in the driest locations.

5: No indication of ability to compete in more moist areas.

DEFENSE (from Distribution Maps)
National Audubon Society (NAS) Map: (NORTH) Solid Z5. (SOUTH) Solid Z8.

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

2   Sun Strength

3   Shade Strength

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

Click here for Key
1.8 = Very Slow
+.3 = Pioneer Capable
0 = ???
+.2 = Moderate
0 =No
-.3 = 35'
-.2 = 70'

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

Click here for Key
2.5 = Intolerant
+.3 = Climax Capable
0 = ???
+.2 = Moderate
0 = No
-.2 = 35'
0 = 230 yrs

TOTAL SCORE (1.8): NRCS Plants database 20yr hgt does not correspond well with rapid rating. All literature indicates rapid growth however.

TOTAL SCORE (2.8): Shade intolerant. Only able to compete on the very driest of sites.

3   Fire Strength

5   Wind Strength

DEFENSE
Base Score: Small Tree = 1-2
Fire Effects (FEIS) database indicates that tree is more fire tolerant than some of its associates, but it is still a small tree. Despite small size I will assign a 3.
Final Value = 3

DEFENSE
Base Score: ???
Small tree with hard wood. Assign highest value.
Final Value = 5