https://extension.oregonstate.edu/desch ... ltemps.pdf
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Subject: Only the lettuce is growing?
digitS' wrote:Megan, if you look at this chart from the University of Minnesota 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 .
Steve