Operational Time Requirements

The following are general guidelines for field conditioning, Tree Seed Centre conditioning, cone and seed processing, testing and preparation for sowing.

Clients may request that seedlots be processed on a priority basis if the seedlot must be immediately available for seedling production, or if there are concerns with pre-germination or insect activity. These timelines are average requirements, but the Tree Seed Centre is constantly faced with meeting the unique timelines of its clients.

Guide to Tree Seed Centre Operational Time Requirements


  Estimated Time under Average Crop Conditions (in weeks) Sowing pre-treatment**
 
Common name Species Code Field conditioning (prior to shipping*) Extraction and processing Registration and storage Testing Soak (hrs)   Method Time (wks)

Western redcedar Cw 0-1 1 3 0   pellet coated 4
Western hemlock Hw 0-1 2 1 8 24   chilling at 2>-5°C 4
Western larch Lw 2-4 3 1 6 24   chilling at 2>-5°C 3
Douglas-fir Fdc/Fdi 2-4 3 1 6 24   chilling at 2>-5°C 3
Spruce species Sx/Sxs/Ss 2-4 3 1 6 24   chilling at 2>-5°C 3
Lodgepole pine Plc/Pli 0 2 1 7 24   chilling at 2>-5°C 4
Mountain hemlock Hm 2-4 3 1 8 24   chilling at 2>-5°C 4
Ponderosa pine Py 2-4 3 1 7 24   chilling at 2>-5°C 4
Western white pine Pw 2-4 4 1 20 336   14 wks at 2>-5°C 16
Yellow cedar Yc 0-1 3 1 16 72   4 wks at 20°C + 11 wks at 2>-5°C 15
Grand fir Bg 4 4 1 8 48   chilling at 2>-5°C 4
Pacific silver fir Ba 4 4 1 16 48   strat/redry 4 + 8 wks 12
Sub-alpine fir Bl 4 4 1 16 48   strat/redry 4 + 8 wks 12
Noble fir Bp 4 4 1 16 48   strat/redry 4 + 8 wks 12

* Transport Notice: Contact the Tree Seed Centre, Surrey at 778-609-2005 to arrange a date for cones and/or seed to arrive. This date will vary depending upon crop year, available storage space at the TSC and the condition of your cones. The Tree Seed Centre will make all efforts to expedite your shipment, but please make all efforts to notify us in a timely manner - the earlier the better.
** Pre-treatment requirements may vary by seedlot. Times stated here are maximum requirements. Time to withdraw will range from 5 to 10 days, depending on seasonal demands.