Tree Seed Centre Time Requirements

Estimated Time under Average Crop Conditions (in weeks)

Sowing pretreatment**

Common name

Species Code

Field conditioning (prior to shipping*)

Tree Seed Centre conditioning

Extraction and processing

Registration and storage

Testing

Soak (hrs)

Method

Time (wks)

Western redcedar

Cw

0-1

1

2

1

3

0

pellet coated

4

Western hemlock

Hw

0-1

1

2

1

8

24

chilling at 2>-5°C

4

Western larch

Lw

4

3

1

6

24

chilling at 2>-5°C

3

Douglas-fir

Fdc/Fdi

4

3

1

6

24

chilling at 2>-5°C

3

Spruce species

Sxs/Ss

4

1

6

24

chilling at 2>-5°C

3

Lodgepole pine

Plc/Pli

0

3

1

7

24

chilling at 2>-5°C

4

Mountain hemlock

Hm

4

2

1

8

24

chilling at 2>-5°C

4

Ponderosa pine

Py

2-4

4

3

1

7

24

chilling at 2>-5°C

4

Western white pine

Pw

4

3

1

20

336

14 wks at 2>-5°C

16

Yellow cedar

Cy

4

2

1

16

72

4 wks at 20°C + 8 wks at 2>-5°C

12

Grand fir

Bg

4

12

4

1

8

48

chilling at 2>-5°C

4

Pacific silver fir

Ba

4

12

4

1

16

48

strat/redry 4 + 8 wks

12

Sub-alpine fir

Bl

4

12

4

1

16

48

strat/redry 4 + 8 wks

12

Noble fir

Bp

4

12

4

1

16

48

strat/redry 4 + 8 wks

12

* Transport Notice: Contact the Tree Seed Centre, Surrey at 604-541-1683 extension 227 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. We will make all efforts to expedite your shipment, but please make all efforts to notify us in a timely manner - the earlier the better.
** Pretreatment 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.

Guide to Tree Seed Centre operational time requirements
		Estimated Time under Average Crop Conditions (in weeks)					Sowing pretreatment**

Common name	Species Code	*Field conditioning (prior to shipping)**	Tree Seed Centre conditioning	Extraction and processing	Registration and storage	Testing	Soak (hrs)	Method	Time (wks)

Western redcedar	Cw	0-1	1	2	1	3	0	pellet coated	4
Western hemlock	Hw	0-1	1	2	1	8	24	chilling at 2>-5°C	4
Western larch	Lw	4	4	3	1	6	24	chilling at 2>-5°C	3
Douglas-fir	Fdc/Fdi	4	4	3	1	6	24	chilling at 2>-5°C	3
Spruce species	Sxs/Ss	4	4	4	1	6	24	chilling at 2>-5°C	3
Lodgepole pine	Plc/Pli	0	0	3	1	7	24	chilling at 2>-5°C	4
Mountain hemlock	Hm	4	4	2	1	8	24	chilling at 2>-5°C	4
Ponderosa pine	Py	2-4	4	3	1	7	24	chilling at 2>-5°C	4
Western white pine	Pw	4	4	3	1	20	336	14 wks at 2>-5°C	16
Yellow cedar	Cy	4	4	2	1	16	72	4 wks at 20°C + 8 wks at 2>-5°C	12
Grand fir	Bg	4	12	4	1	8	48	chilling at 2>-5°C	4
Pacific silver fir	Ba	4	12	4	1	16	48	strat/redry 4 + 8 wks	12
Sub-alpine fir	Bl	4	12	4	1	16	48	strat/redry 4 + 8 wks	12
Noble fir	Bp	4	12	4	1	16	48	strat/redry 4 + 8 wks	12
* Transport Notice: Contact the Tree Seed Centre, Surrey at 604-541-1683 extension 227 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. We will make all efforts to expedite your shipment, but please make all efforts to notify us in a timely manner - the earlier the better. ** Pretreatment 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.