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Mountain Hemlock (Hm)

This species is important in reforestation of coastal and southern interior wet high elevation forests, although it is susceptible to drought, Armillaria, and branch and stem breakage from the combined effects of snow and vegetation. The major limiting factors that stock type selection can address for Hm is vegetative competition and snowpress. Hm may have a higher incidence of foliage disease than other species due to the tender shoots and dense foliage. It may be better to order larger container types to minimize the problem.

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Spruce (Sx)

Lodgepole Pine (Pli/Plc)

Western Redcedar (Cw)

Coastal Douglas-fir (Fdc)

Interior Douglas-fir (Fdi)

Sitka Spruce (Ss and Sxs)

Western Larch (Lw)

Western White Pine (Pw)

Yellow Pine (Py)

Subalpine Fir (Bl)

Amabilis Fir (Ba)

Noble Fir (Bn)

Grand Fir (Bg)

Western Hemlock (Hw)

Mountain Hemlock (Hm)

Yellow-cedar (Yc)

Hardwoods

Native Shrubs

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Sowing Trends ­ 1993/1998
Species:   Mountain hemlock (Hm)

  1993 1998

% of total sowing of Hm
     1 + 0
     BBR/PBR
93
0
100
0
# of stock types 3 5
Dominant container types 313B 410A
Smallest container type 313B 313B
Largest container type 415B 415D
Quantity sown (K) 63 245

New stock types since 1993:  415D

Pie graph showing Hm stock type profile, 1998 sowing.

Plate 35.   Hw and Hm stock types. Note the shorter, darker needles and larger buds on the Hm. (Arrowheads indicate target heights.)

Hm stock types.


Hm stock type suitability.

Hm Limiting factors
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spacer graphic Season Vegetation
competition
Snow-
press
Animal
damage
Shallow
soils

Recommended stock types:
PSB 313B 1+0 Sp, Su, Fa Poor Poor Poor Fair
PSB 410 1+0 Sp, Su, Fa Good Good Good Good
PSB 415B 1+0 Sp, Su, Fa Good Good Good Poor
PSB 412A 1+0 Sp, Su, Fa Good Good Fair Good
PSB 415D 1+0 Sp, Su, Fa Good Good Good Poor


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