Plants have best friends just like people do. Marigolds help tomatoes and roses grow better. Nasturtiums keep bugs away from squash and broccoli. Petunias protect beans from beetles and oregano chases them away from cucumbers. Geraniums keep Japanese beet
Kitchen garden inspiration - build an Amish cold frame. I love this clever design. No plans available (our Amish friends didn't even use plans to build our sheep barn), but there are 10 photos in this post showing construction details.