Cold Frames are basically miniature greenhouses and are perfect for raised gardens beds. You can use cold frames as season extenders plus they are designed to be used all year round. A cold frame can be adapted to start seedlings early in the spring and when the weather warms up simply prop the cold frame open in the summer to provide the perfect indirect light so that your seedlings and plants flourish.
An added bonus of utilizing a cold frame is to keep the plants above ground and away from many of these pesky bugs that can destroy a plant right when it is beginning its growth cycle. Greenhouse Hub offers a selection of cold frames from pop-up cold frames to deluxe solar panel diffused cold frames down to moderately priced cold frames. You're sure to find a cold frame that not only meets your need but also meets your budget.