Seed Planning Units (SPU) and species plans
Last updated on March 11, 2024Seed Planning Units (SPUs) are the organizational units that form the basis for breeding and seed production planning. They are organized by species, seed planning zone, and elevation band.
For example #17, the Pli BV Low is the SPU for interior lodgepole pine in the Bulkley Valley seed planning zone at elevations below 1100 m. Based on the Forest Genetics Council Strategic Business Plan, SPUs are designed to facilitate program development and strategic planning for tree improvement.
A species plan
For each Seed Planning Unit (SPU), the potential economic return from a breeding and seed orchard program is determined. The SPUs are then ranked according to those indicating the highest return. Forest Genetics Council Species Committees develop species plans for those SPUs with the highest expected return.
Species plans contain
- Breeding and seed production projections
- Plans for propagation and management activities
- Analyses of current and proposed seed orchards
Species plans also show the timeline for genetic improvement, including projected supply and demand for planting stock, and projected genetic gain.
Each of the following files provides information on the timelines for a species/seed planning zone/elevation range combination
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Species |
Planning zone, elevation and latitude |
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1 |
Maritime Low (1 to 900 m) South 480 00’ to 520 00’ |
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2 |
Maritime Low (1 to 700 m) South 480 00’ to 520 00’ |
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3 |
Maritime Low (1 to 600 m) South 480 00’ to 520 00’ |
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4 |
Nelson Mid (1000 to 1700 m) |
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5 |
Nelson High (1700 to 2100 m) |
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6 |
Maritime Low (1 to 500 m) South 480 00’ to 540 00’ |
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7 |
Nelson Low (700 to 1600 m) |
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8 |
Maritime Low (1 to 1000 m) |
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9 |
Sub Maritime Low (1 to 1000 m) |
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10 |
Thompson Okanagan Low (700 to 1400 m) |
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11 |
Maritime All (1 to 1100 m) South 480 00’ – 520 00’ |
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12 |
Prince George Low (700 to 1400 m) |
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13 |
Nelson Low (700 to 1600 m) |
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14 |
Prince George Low (600 to 1400 m) |
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15 |
Kootenay/Quesnel Low (500 to 1400 m) |
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16 |
Thompson Okanagan High (1400 to 1600 m) |
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17 |
Bulkley Valley Low (700 to 1400 m) |
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18 |
Central Plateau Low (700 to 1300 m) |
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19 |
Sub Maritime Low (400 to 1200 m) |
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20 |
Nelson High (1600 to 2000 m) |
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21 |
Nelson Low (400 to 1200 m) |
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22 |
Nelson High (1000 to 1800 m) |
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23 |
Sub Maritime/Nass-Skeena Transition (All elevations) |
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24 |
Maritime High (600 to 1100 m) |
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25 |
East Kootenay All (750 to 1900) |
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26 |
Prince George High (1400 to 2000 m) |
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27 |
Sub Maritime Low (200 to 1000 m) |
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28 |
Thompson Okanagan High (1300 to 2100 m) |
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29 |
East Kootenay High (1500 to 2000 m) |
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30 |
Thompson Okanagan Low (700 to 1500 m) |
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31 |
Maritime High (900 to 1200 m) |
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32 |
East Kootenay Low (800 to 1500 m) |
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33 |
Maritime High (700 to 1500 m) |
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34 |
East Kootenay Low (800 to 1700 m) |
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35 |
Bulkley Valley Low (700 to 1400 m) |
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36 |
Maritime Low (1 to 700 m) |
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37 |
Quesnel Lakes Low (700 to 1400 m) |
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38 |
Maritime Low South (see HW Prog #3) (1 to 600) |
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39 |
East Kootenay Low (700 to 1400) |
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40M |
Peace River Mid (650 to 1200 m) |
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40L |
Peace River Low (<650 m) |
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41 |
Prince George Low (700 to 1200) |
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42 |
Prince George High (1200 to 1550 m) |
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43 |
Cariboo Transition Low (600 to 1400) |
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44 |
Nelson Low (1 to 1000m) |
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45 |
Big Bar/Chilcotin (All elevations) |
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46 |
NST / BLK / MIC / MGR / WK / SA (All elevations) |
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47 |
Maritime, Sub maritime (+300/-400) |
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48 |
Commercial Broadleaves Interior (All elevations) |
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49 |
Commercial Broadleaves Coast (All elevations) |
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50 |
Nelson High (1200 to 1800) |
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51 |
Southern Interior (300 to 1000 m) |
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52 |
Thompson-Okanagan (600 to 1099 m) |
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53 |
Thompson-Okanagan (1100 to 1600 m) |
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54 |
Maritime (1 to 700 m) |
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