This removable greenhouse cover come in handy. If the growing season in your area is short or you would like to start your garden vegetables early, a green house cover is a good solution. When it becomes warm enough, you don’t need the greenhouse cover any more, you either remove the greenhouse or move your veggies out of greenhouse.
I found this solution from apartment therapy to be optimal. It is a removable greenhouse cover. During day time, you can just open the cover, while when it is still cold enough, you just close the greenhouse cover to protect your garden plants. When it is warm enough even for nights, you just remove the whole greenhouse cover easily. For sure to try it this year.