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applestar
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DigitS posted a great link for seed germinating temp/time

DigitS alerted me that the link he posted in the following post appears to have been discontinued. He has kindly searched and found the same chart here:

[url]https://extension.oregonstate.edu/deschutes/sites/default/files/Horticulture/documents/soiltemps.pdf[/url]

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[url=https://www.helpfulgardener.com/forum/viewtopic.php?p=189092#p189092]Subject: Only the lettuce is growing?[/url]
digitS' wrote:Megan, if you look at [url=https://www.vegedge.umn.edu/mnvegnew/vol2/0400t1.htm]this chart from the University of Minnesota[/url] you will see that lettuce is absolutely the earliest in a cool, 41°F soil. Lettuce will sprout in 15 days but even spinach takes a week longer.

It seems to me that there is this common misconception that peas, peas, peas -- should be planted in cold soil. But notice, peas take 36 days at 41°F! And realize that peas are planted deeper than lettuce or spinach where the soil takes more days to warm in the early spring. When I see how early some folks sow pea seed I often ask myself why they don't plant later when something like a month wait won't be required.

The link you post has the guy saying that sowing without pre-sprouting pea seed results in 15% germination with the remainder rotting. That must be an entirely different gardening environment to what I am used to :roll:.

Steve
Last edited by applestar on Tue Dec 15, 2015 5:20 am, edited 2 times in total.
Reason: To provide a new link in place of old, now defunct, link.

garden5
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WOW, that is a great link! Thanks for making it a sticky, Apps.

Look at the peppers! That gives me a good idea why my germination is so spotty, I don't keep my soil nearly hot enough. I really have to get a heating mat next year.
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jnunez918
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garden5 wrote:WOW, that is a great link! Thanks for making it a sticky, Apps.

Look at the peppers! That gives me a good idea why my germination is so spotty, I don't keep my soil nearly hot enough. I really have to get a heating mat next year.
I have mine with a desk lamp pointed right at them. They are germinating great!
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GardenGnome
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I just do 75 for all my seeds well warm crops and there doing good....alittle to good.
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applestar
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There was a chart in Johnny's Selected Seeds catalog detailing how long seedlings take to grow to transplant size and when to plant them outside. So I went looking or it on their website, and the had this interactive calculator:
https://www.johnnyseeds.com/e-PDGSeedStart.aspx

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applestar
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Re: DigitS posted a great link for seed germinating temp/tim

Subject: Temperature & the time it takes different seeds to sprout!
rainbowgardener wrote:I posted this once before, but here it is again:


https://tomclothier.hort.net/page11.html

scroll down a bit to the chart:

Percentage of Normal Vegetable Seedlings
Produced at Different Temperatures

so reading across the tomato row: (degrees F)


Soil Temp 32...41....50..........59.......68........77.......86......95....104
Tomatoes 0.....0....82(43)..98(14)...98(8)...97(6)...83(6)..46(9)...0

so at 32 and 41 deg, none of the seeds sprouted. At 50 degrees 82% sprouted, but it took them 43 days to do so (!). At 59 deg, there was almost complete germination by 14 days, at 68 it took 8 days and at 77 only 6. At 86 deg, it still took 6 days, but germination percent is beginning to decline again.

Of course YRMV, but this gives an idea of the effect of temperature on germination rate and percent.
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applestar
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Re: DigitS posted a great link for seed germinating temp/tim

Updated the OP with working link. Thanks, digitS. :D
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Re: DigitS posted a great link for seed germinating temp/tim

Thanks for that table, i need time to convert them all or some to degree, i don't use F and i really don't like it in temp measuring, but i know it is your standard, but this table giving me the idea about the temp for different plant, hope this will help me later on.

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