hi, It depends were you live. here in SE NY our last frost date is may15 so countback 8 weeks and that puts the tomato seeding date at around march 20th. as for carrots direct seed them as soon as the soil has warmed above 47*or so

I am in MA Zone 6, so probably right to your north. I am planning on planting out May 16, so I am starting a small number of tomatoes 9 weeks out (March 14) and the marjority of them 6 weeks out. I'm sort of running an experiment to see if the ones I start earlier turn out better or worse than the later ones. But I agree with daylily - March 20 is probably a great date to start tomatoes for around here.

6 to 8 weeks before Memorial Day

thanks all. i knew it was roughly around those dates i had to make sure you only get one chance in these parts

I live in southern CT (12 mi. north of the sound). I usually plant sometime between May 15 and Memorial Day, depending on the weather. I have found that if I start my seeds before April 1, the plants get too leggy before plant out time.

John A