Seed Germination Temperatures and Times. Days to Maturity. And Plant Minimum Temperatures. NW Edition.

by A.J. Coltrane

A couple of spreadsheets with seed germination times and temperatures, days to maturity, and the minimum temperature that the adult plants will tolerate.

The spreadsheets only contain the plants that:

1.  Do well in the Pacific Northwest. That’s where we are.

2.  Do well in containers. That’s how we’re gardening.

and

3.  Represent plants we’ll potentially eat.

I’ll likely add more plants at a later date, either because I overlooked the plant on the first pass, or because somebody else asks for the info. As it was, I made more manageable spreadsheets (and saved work) by not including most of the root vegetables, as well as the veggies that we’re unlikely to consume.

Much of the information is from the Territorial Seed website. The balance was drawn from various online, reasonably reputable sources (other seed houses, edu sites, etc.)

The first spreadsheet is sorted alphabetically:

Variety Germination Temperature Emergence (Days) Maturity (Days) Freeze Out Temperature
Arugula 40-70º 5-7 30-50 5-10º
Basil 60-75º 6-14 60-90 50º
Beans, Bush (Snap) 60-85º 8-16 55-66 50º
Beans, Bush (Dry) 65-85º 8-16 80-100 50º
Beans, Pole 65-85º 8-16 60-80 50º
Beans, Edamame 65-85º 7-10 180 50º?
Beans, Fava 60-85º 8-18 70-180 10-20º
Beans, Lima 60-85º 8-16 75 50º?
Beets 55-70º 5-17 50-65 5-20º
Broccoli – Fall Harvest 55-75º 5-17 55-85 Before Severe Frost
Broccoli, overwinter 55-75º 5-17 220-250 15-20º
Brussels Sprouts 55-75º 5-17 80-160 After Severe Frost
Cabbage, early 55-75º 5-17 50-78 Before Heavy Freeze
Cabbage, late 55-75º 5-17 85-220 Before Heavy Freeze
Chinese Cabbage 55-75º 5-17 75-80 20º
Carrots 60-70º 6-21 56-75
Cilantro 55-70º 14-21 60-90 10º
Collards 55-75º 5-17 55-60 5-10º
Corn Salad (Mache) 45-70º 2-15 50
Cress 45-70º 2-15 15-60 5-10º
Cucumbers 65-90º 4-13 45-75 Warm Weather Only
Dill 60-75º 7-15 40-60 30º
Kale 55-75º 5-17 60-70 5-10º
Leeks 55-75º 6-16 105-110
Lettuce 40-75º 2-15 29-75 5-10º
New Zealand Spinach 45-70º 2-15 50 40º
Onions 55-75º 6-16 50-110 5-10º
Parsley 50-75º 12-28 75-80 15-20º
Peas 40-75º 6-14 55-75 15º
Peppers 70-85º 8-25 55-100 Warm Weather Only
Radish 45-80º 4-11 22-32 15-20º
Shallots 50-75º 6-16 120 5-10º
Spinach 55-65º 6-21 30-50 5-10º
Squash, Summer 65-85º 5-10 48-70 Warm Weather Only
Swiss Chard 50-75º 5-17 50-60
Tomatoes 70-90º 6-14 55-100 Warm Weather Only

This one is sorted by minimum seed germination temperature — I was looking for the plants that could be sown at the far ends of the growing season:

Variety Germination Temperature Emergence (Days) Maturity (Days) Freeze Out Temperature
Arugula 40-70º 5-7 30-50 5-10º
Lettuce 40-75º 2-15 29-75 5-10º
Peas 40-75º 6-14 55-75 15º
Corn Salad (Mache) 45-70º 2-15 50
Cress 45-70º 2-15 15-60 5-10º
New Zealand Spinach 45-70º 2-15 50 40º
Radish 45-80º 4-11 22-32 15-20º
Parsley 50-75º 12-28 75-80 15-20º
Shallots 50-75º 6-16 120 5-10º
Swiss Chard 50-75º 5-17 50-60
Spinach 55-65º 6-21 30-50 5-10º
Beets 55-70º 5-17 50-65 5-20º
Cilantro 55-70º 14-21 60-90 10º
Broccoli – Fall Harvest 55-75º 5-17 55-85 Before Severe Frost
Broccoli, overwinter 55-75º 5-17 220-250 15-20º
Brussels Sprouts 55-75º 5-17 80-160 After Severe Frost
Cabbage, early 55-75º 5-17 50-78 Before Heavy Freeze
Cabbage, late 55-75º 5-17 85-220 Before Heavy Freeze
Chinese Cabbage 55-75º 5-17 75-80 20º
Collards 55-75º 5-17 55-60 5-10º
Kale 55-75º 5-17 60-70 5-10º
Leeks 55-75º 6-16 105-110
Onions 55-75º 6-16 50-110 5-10º
Carrots 60-70º 6-21 56-75
Basil 60-75º 6-14 60-90 50º
Dill 60-75º 7-15 40-60 30º
Beans, Bush (Snap) 60-85º 8-16 55-66 50º
Beans, Fava 60-85º 8-18 70-180 10-20º
Beans, Lima 60-85º 8-16 75 50º?
Beans, Bush (Dry) 65-85º 8-16 80-100 50º
Beans, Pole 65-85º 8-16 60-80 50º
Beans, Edamame 65-85º 7-10 180 50º?
Squash, Summer 65-85º 5-10 48-70 Warm Weather Only
Cucumbers 65-90º 4-13 45-75 Warm Weather Only
Peppers 70-85º 8-25 55-100 Warm Weather Only
Tomatoes 70-90º 6-14 55-100 Warm Weather Only

Finally, a big BOOOO!!! to Adobe for making the data collection require more time that it should have.

1 comment to Seed Germination Temperatures and Times. Days to Maturity. And Plant Minimum Temperatures. NW Edition.

Leave a Reply

You can use these HTML tags

<a href="" title=""> <abbr title=""> <acronym title=""> <b> <blockquote cite=""> <cite> <code> <del datetime=""> <em> <i> <q cite=""> <s> <strike> <strong>