Well, I often do not read carefully. Writing
carefully isn't a real strong suit either.
Let's see, in your 1st post you were asking, "Any tips?" Here is my tip: March 17th isn't the best date to plant peas in many, many locations. Certainly, it wouldn't work for my location. Planting them in early March would be impossible on half the years, the ground is frozen.
When others offered some mild hesitation toward accepting the idea that March 17th was best, you responded, "Here is a detailed article on how to grow Sweet Peas, below. You will note that it says to mark your calendar to plant them on March 17 . . ." The link to the blogspot blog AND Garden Alive article by Mike McGrath, both have that same date: March 17. Okay, you are clearly committed to that date but I'll go back to my contention that it isn't best for a whole lot of us.
The examples I used were extreme: northern Canada and Alaska where the temperatures are still sub-zero every day. I am sorry for having done that. Here are 6 states and no mention of March 17th or March, for that matter:
Here is Alabama Cooperative Extension advising their gardeners to plant in "February."
Here is Clemson University advising South Carolinian gardeners to plant from January 10 thru February 15th.
Here is South Dakota State advising gardeners to plant "in April or early May." They also tell us to use "succession planting (every 1 to 2 weeks)" for a long season of production.
Here is the University of New Hampshire giving dates of "April 20 May 5" for planting peas.
Here is Oregon State University suggesting February for "western Oregon" for garden peas and sweet peas and gardeners in Central Oregon and higher elevations of eastern Oregon sowing in "late April."
The University of Idaho tells us "peas should be direct-seeded about one month before average last spring frost and after average daily soil temperatures reach 50F." I won't pay too close attention to that since waiting for a 50 soil temperature would be very late, altho' it will fit fine for later sowings. My soil right now is 36.
On that other thread on soil temperature I linked to University of Minnesota information on germination times at various temperatures. It is 36 days at 41. My soil is still 5 short of that and if the seed went in now, I'm fairly confident that it would take over a month for emergence.
I am sorry if I sounded condescending and probably a bit silly, as well. I have now really gone on too much on the subject of when should peas be planted but I think it depends on what kind of peas and it varies greatly by climate. And, I'm going to go ahead and post this.
Steve