Chives work really well, the toms you might want to wait on till after frost. They don't sprout for me till it warms up that much anyway. In z5b anyway.

I'm in zone five and I WS my tomatoes last week. I'm not sowing chives this year, because they are perennial and come back each year, but in the past when I sowed them, I want to say it was February or March. They are pretty cold tolerant.

Since you are a zone warmer than me, I would think it is safe for you to sow them now.

Bonnie

thanks for your input!