I start them on March 16th. I don't want them too root bound...27 days from seeding to setting in the garden...mine grow fast from seeding...I feed them.

I like starting them about 6 weeks before putting out, Try to get them in the first or second week of April but of course it all depends on mother nature.

I'm in zone 6 too. And while I've already started the brussels sprouts, I tend to wait a couple weeks after for the broccoli, cauliflower, and cabbage, so I'll start those maybe sometime next week.

When I was starting seeds indoors, this is about the time I would start peppers and tomatoes, but I am trying to winter sow all of my veggies this year to reclaim valuable indoor space. I've only sowed spinach (as well as a few cold-hardy herbs and flowers) so far. I was planning on planting peas directly in the ground this week, but the forecast is calling for multiple chances of snow all the way through Tuesday... guess it's gonna be pushed back into late February/early March.

I'm going to winter sow warm season veggies too, but not until mid- or late-March. This will be my first year growing them this way, so this will be a test to see how effective it compared to starting them indoors.

I have it marked on my calendar for March 14th (zone 6b NY), to be transplanted out about a week or two before last frost towards the end of April. I also don't want them to get rootbound. This is my first time with them though so I can't say yet how it will go.

In Zone 6, as well. I tried starting my early spring crops this early last year and they ended up pretty leggy. I had them in my window sill (facing west). I suppose now would be a good time if you have a grow light set-up. Otherwise, I'm targeting March 1.