>>2256350Hoophouses. You can go fancy like pic related, or I've got one that I just use clothespins to shut when there's a dip in temperature and then I open the 6 mil plastic curtains when it gets above 40/whatever temp your produce likes. And then I fully take off the plastic around mid-May so the toms/cukes/whatevers can be staked/trellised.
I've had two frosts and I got a third one coming tomorrow and my lettuce, radish, arugula, and cabbage are still growing strong in my hoophouse. I would have planted more stuff if I knew it would work this well. Those beds will stay at 80+ degrees inside when it's 40 outside if you leave if closed on a sunny day and they store a good deal of that heat overnight. My garden will probably keep producing until we hit some week long blizzard that hits the single digits or the negatives and blots out the sun for a few days.
And you can use a poly tubing watering system for summer watering. Just make sure you either bury most of the hoses a foot under the ground and put insulation on any of the hose that's above that or you bring the hoses back in before you get your first frost.