Starting Plants from Seed

I thought last year was strange as far as the weather went but this year has been a real kicker. Last week we had temperatures in the 60's and this week down to zero. Weather like this forces me to look at the calendar to remind myself how far we are into the year. The Master Gardeners Plant Sale is just around the corner on May 14th and my start date for plants is already here. I won't start anything that is going to be planted outside until the first half of April, though. Mine will all go in the greenhouse. I do hope we don't get the fluctuating temperatures like we did last spring. Alth...