Best success is to sow seeds 3-4 weeks prior to transplanting outside. usual transplant time is 4-5 weeks prior to the last frost date. here in Iowa I like to set the plants out around the first of April with some protection from heavier frosts. Usual guidelines is about a week after you plant peas. A Fall crop works well here if direct seeded in mid July.
Packet will contain approximately 200- 300 seeds unless noted otherwise. UPDATED FOR 2022