I've done mine this way for 3 years-I hardly start anything inside anymore, but I've waited until the 3rd or 4th week of April, so it's almost spring sowing but my results have been good

I WS them last year in late April.

I may WS them with covers on top directly in the ground this year. I just have too many seedlings to plant out. I went overboard.

Veggies ws'ed very well for me last year. My squashes did great but they grew fast so they were not in the container for too long.

Let us know what you decide.... I hope it works for you

Most zucchini fruit in 55-65 days..

you could wintersow it, but be careful not to do it too early, if you are still getting freezes and they need to transplant you might run into trouble.

I just direct sow these about the same time as my cukes and green beans.

Something things I wintersow and others I do not