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Western Hemlock (Hw)

At the upper elevational extreme of Hw, snowpress and frost damage may limit the suitability of the species. Mountain hemlock is better suited to these conditions although it may also be vulnerable to snowpress.

The major limiting factors that stock type selection can address are vegetation competition and animal damage.

Western hemlock may have a higher incidence of foliage disease than other species due to the dense canopies and tender shoots. It may be better to order larger container types in order 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:   Western hemlock (Hw)

  1993 1998

% of total sowing of Hw
     1 + 0
     BBR/PBR
98
1
99
1
# of stock types 11 10
Dominant container types 313B 410/313B/415B
Smallest container type 310A 313B
Largest container type 615A 1015
Quantity sown (K) 7983 6376

New stock types since 1993:  1015/412A

Pie graph showing Hw stock type profile, 1998 sowing.


Hw stock type suitability.

Hw 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 Fair Fair Fair Good
PSB 415B 1+0 Sp, Su, Fa Fair Fair Fair Poor
PSB 412A 1+0 Sp, Su, Fa Good Good Good Good
PSB 415D 1+0 Sp, Su, Fa Good Good Good Poor
PSB 512A 1+0 Sp, Su, Fa Good Good Good Good
PSB 615A 1+0 Sp, Su, Fa Good Good Good Poor
PBR 211A 2+0 Sp Good Good Good Poor


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