I sprout my own seeds and usually start the peppers and tomatoes around Valentines Day to go in the ground about Apr 15th - May 1st.
This year I’m giving Johnny’s Selected Seeds a try as I only have a backyard garden.
The previous couple of years I used Park Seed Co and their product was all first-rate, but expensive.
I Love Johnny’s.
Their catalog is excellent with germination Temps. Prices are a little high but great people. Employee owned company.