Soil Temps and Germination vegetables - Ask Extension
I am looking for a chart that gives common vegetables, an assortment of SOIL temperature columns, and days to germination at those temps. Not "best ...
Knowledgebase
Soil Temps and Germination vegetables #735429
Asked December 17, 2020, 1:59 PM EST
I am looking for a chart that gives common vegetables, an assortment of SOIL temperature columns, and days to germination at those temps. Not "best germinated at...." guides, but actual ranges/temps.
The problem is I am looking for approved and vetted resources; preferably university. The 1980's chart shown in most publications (even some university horticulture documents) states clearly that the source and author are unknown. The chart below is the one I am talking about....I would like the same thing, but authenticated/documented/vetted. Do you know a source?
The problem is I am looking for approved and vetted resources; preferably university. The 1980's chart shown in most publications (even some university horticulture documents) states clearly that the source and author are unknown. The chart below is the one I am talking about....I would like the same thing, but authenticated/documented/vetted. Do you know a source?
County Oregon
Expert Response
Thank you for your question. The best way to get scientifically reliable information is to go to a website with either "site:edu" or "site"gov" domain. Here is one such chart from Oregon State (site:edu): Soil Temperature Conditions for Vegetable Seed Germination | OSU Extension Service (oregonstate.edu)
I hope this is what you are seeking. Good luck!
I hope this is what you are seeking. Good luck!
I think the article I previously cited has all that you were asking for, but the following more general OSU Extension publication may help as well: em9027.pdf (oregonstate.edu)
Thanks for the quick response, but it isn't what I was looking for. An "Optimum range" of 55-90 is not helpful at all for determining days to germination. Something like the chart I provided is more helpful, though the increments could be given in 10 degree differences. I just don't know if the chart I shared is trustworthy to share with others or not, (even though it is often posted in pop media sites and some university as well) which is why I wanted a better resource that provided incremental differences showing days to germination at various soil temperatures. I do not have the resources to conduct this kind of study myself, and I would imagine someone, somewhere has already done this. :)
I am afraid what I provided you is the best I could find, although you might be interested in this interactive device: Climate Smart Farming CSF Growing Degree Day Calculator
Using your suggestion for site:edu I found this UC Davis document from the 1950's, updated Aug 2017. The second table provides what I was looking for. Hopefully some researcher will build on this and add more types of vegetable/crops http://sacmg.ucanr.edu/files/164220.pdf
Thank you for your help!
Thank you for your help!
Welcome! Happy researching!
