Look on the package and see what it says about how long to plant before first front date. I've started all those seeds in seed pellets and transplanted them into the garden with success.

Should you? No. You can if you wish but all the things you list are normally direct seeded in the garden and all 4 will do better if you do direct seed them and avoid the problems of transplanting them. Cuke and squash, if started inside, have to be transplanted before they develop their second set of true leaves.

Dave

I would winter sow the zukes and squash. I dont know if you can do the cukes and definately direct sow the beans. Check out the winter sowing forum if you need info.

I wouldn't bother starting cukes and beans inside. I've tried zucchini and summer squash indoors and I think it sped the progress somewhat. I'll be doing it again this spring about 4 weeks before I put them outside.
Rick