Best time to sow your seeds
Latin Name Common Name Stratification (Days/Temp) Sowing Date (non-stratified seed) Sowing Date (stratified seed) Swoing Depth (cm)
Abies balsamea
Balsam fir 60 / 5°C
Early Sept
Mid May
0.5
Acer tatarica
Tatarian maple
45 / 5°C
Mid Oct
Mid May
2
Acer negundo
Manitoba maple 45 / 5°C
Mid Oct
Mid May
2
Acer tegmentosum
Snakebark Maple 120 / 5°C
Mid Oct
Mid May
2
Aesculus glabra
Ohio buckeye
60 / 5°C
Late Sept
Mid May
5
Amelanchier alnifolia
Saskatoon berry 120 / 5°C
Early Aug
Mid May
1
Betual papyrifiera
Paper birch
No treatment needed
Mid Sept or June
Mid Sept or June
0.5
Caragana arborescens
Caragana Water Soak 24 hrs
Mid-Aug or June
Mid-Aug or June
1.5
Cornus stolonifera
Red-osier dogwood 70 / 5 °C
Mid Sept
Mid May
2
Cotoneaster acutifolia
Cotoneaster
90 / 20°C & 120 / 5 °C
Late Aug
Mid May
2
Crataegus arnoldiana
Arnold hawthorn 90 / 20°C & 180 / 5 °C
Mid July
Mid May
2.5
Elaeagnus angustifolia
Russian olive 90 / 5 °C
Mid Oct
Mid May
2.5
Elaeagnus commutata
Wolfwillow 90 / 5 °C
Mid Oct
Mid May
2.5
Fraxinus pennsylvanica
Green ash 60 / 5 °C
Mid Oct
Mid May
1.5
Halimodendron halodendron
Siberian salt tree
15 / 5°C
Mid Oct
Mid May
1
Hippophae rhamnoides
Seabuckthorn Water Soak for 48 hrs
Mid Oct or Mid May
Mid Oct or Mid May
1
Larix sibirica
Siberian larch
Mid Oct or Mid May
Mid Oct or Mid May
1
Malus baccata
Siberian crab 30 / 5 °C
Mid Oct
Mid May
Picea abies
Norway spruce No treatment needed
Mid Oct or Mid May
Mid Oct or Mid May
1
Picea glauca
White spruce No treatment needed
Mid Oct or Mid May
Mid Oct or Mid May
1
Picea pungens
Colorado spruce 30 /5°C
Mid Oct
Mid May
1
Pinus contorta
Lodgepole pine
60 / 5 °C
Mid Oct
Mid May
1
Pinus mugo
Mugo pine
60 / 5 °C
Mid Oct
Mid May
1.5
Pinus ponderosa
Ponderosa pine 30 / 5 °C
Mid Oct
Mid May
1.5
Pinus sibirica
Siberian pine 60 / 20°C & 120 / 5 °C
Mid Aug
Mid May
1.5
Pinus sylvestris
Scots pine No treatment needed
Mid Oct or Mid May
Mid Oct or Mid May
1.5
Prunus besseyi
Sand cherry
140 / 20°C & 90 / 5 °C
Late July
Mid May
2
Prunus cerasus
Sour cherry 90 / 5 °C
Late July
Mid May
2
Prunus fruticosa
Mongolian cherry 120 / 5 °C
Late July
Mid May
2
Prunus nigra
Canada plum
120 / 5 °C
Early Aug
Mid May
3
Prunus pensylvanica
Pin cherry
120 / 5 °C
Late July
Mid May
2
Prunus tomentosa
Nanking cherry
150 / 5 °C
Late July
Mid May
2
Prunus virginiana
Choke cherry 30 / 20°C & 120 / 5 °C
Late July
Mid May
2
Pseudotsuga menziesii
Douglas fir 60 / 5 °C
Mid Oct
Mid May
2
Pyrus ussuriensis
Ussurian pear 60 / 5 °C
Late Sept
Mid May
2
Quercus macrocarpa
Bur oak
120 / 5 °C
Late Sept
Mid May
3
Rosa woodsii
Wood’s rose 90 / 20°C & 120 / 5 °C
Late July
Mid May
1.5
Rosa rugosa x woodsii
Hedge rose 90 / 20° & 120 / 5 °
Late July
Mid May
1.5
Sambucus racemosa
Red elder 90 / 25°C & 120 / 5 °C
Late July
Mid May
1.5
Shepherdia argentea
Silver buffaloberry 90 / 5 °C
Mid Oct
Mid May
2
Sorbus aucuparia
European mountain ash 180 / 5 °C
Late Sept
Mid May
0.5
Symphoricarpus occidentalis
Snowberry 120 / 25°C & 180 / 5 °C
Late July
Mid May
1.5
Syringa reticulata
Amur tree lilac 90 / 5 °C
Late Sept
Mid May
2
Syringa villosa
Villosa lilac 60 / 5 °C
Late Sept
Mid May
2
Tilia americana
American linden
150 / 5 °C
Late Sept
Mid May
2
Tilia cordata
Littleleaf linden 90 / 25°C & 90 / 5°C
Mid Aug
Mid May
1.5
Ulmus americana
American elm
No treatment needed
Mid June
Mid June
1.5
Viburnum lentago
Nannyberry 150 / 25°C& 150 / 5°C
Mid June
Mid May
2
Viburnum trilobum
Highbush cranberry 140 / 25 °C
Mid June
Mid May
2
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