I also calculated the time for sowing seeds indoors using Dave's Garden, a website for tips and advice on gardening. The site also has a frost calculator that determines average frost dates by zip code. We planted these today, which gives us a six- to eight-week start on the season for our area.
I used a combination of peat moss and potting soil to fill up the containers. This year, we're using a combination of 3-in. and 4-in. pots left over from last year, as well as a seed starter set. We're hoping the larger pots will encourage more growth for the tomato plants.
Most of the seed packets recommended sowing in soil 1/4 in. deep, but the white sage called for surface sowing. I use a pencil to mark the soil for sowing.
I mark each pot and seeding area with a wooden plant stake, then water each one lightly. Hopefully in a few weeks, we will see the start of tomatoes, peppers and kale, along with some warmer temps outside!