pH Levels for Some Woody Ornamentals

pH levels for some Woody Ornamentals.

Woody ornamentals and their pH preferences

pH 4.0 to 5.0

Spruce, Black

pH 4.5 to 5

Azalea

pH 4.5 to 6

Birch, European (White)
Heather
Rhododendron

pH 5 to 6

Most coniferous species would prefer a soil of this pH
Fir, Balsam
Hemlock
Pine, Jack less tolerant of pH above 6
Pine, Loblolly
Pine, Red Minus resinosus less tolerant of pH above 6
Spruce, White

pH 5.0 to 6.5

Beech
Oak, Pin
Tamarack

pH 6 to 7

Most Hardwoods prefer a soil of this pH
Fir, Douglas
Oak, Black
Pine, White
Spruce, White
Yew, Japanese

pH 6 to 7.5

Ash, White
Maple, Sugar
Spruce, Colorado
Sycamore

pH 6 to 8.0

Walnut, Black
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