As residents of Camas, Washougal, or Vancouver, Washington, and gardeners in general, we often find ourselves looking ways to extend the growing season so we can grow our favorite plants and veggies. One solution to this problem is building a cold frame. A cold frame is a strong, simple structure that you can use to help control the environment of your plants. In this post you’ll learn the process of building a cold frame as well as how to grow and harvest fresh produce even in the cold months.
What Is A Cold Frame?
Before constructing a cold frame, it’s important to understand what a cold frame is, as well as what it does. Basically, a cold frame is a transparent enclosure created to capture and contain sunlight, creating a microclimate that shields plants from harsh weather conditions. This allows you to grow cold-tolerant plants throughout the cold season from late fall to early spring, enabling a longer, if not year-round, growing season.
Location Selection
The first step towards success is finding the perfect location for a cold frame on your property. You’ll want to look for a spot that receives sunlight throughout the day and faces south to maximize sun exposure. Be sure that the area that you choose is well-drained, level, and somewhere you can easily get to.
Tools & Materials
There is a plethora of ways to build a cold frame, and it does not require a multitude of tools and materials. In a lot of cases, the materials you need may already be lying around your garage. Materials consist of clear polycarbonate sheets (or even an old window), hinges, screws, some lumber and a few basic tools such as a drill, screwdriver, and saw.
Construction
Building the frame is a fairly straightforward process. First step is to build a square or rectangular frame using lumber to create a strong base. Then, attach the polycarbonate sheets (or window) to the frame using the hinges, presenting easy access and enhanced ventilation. Make sure it’s a secure fit to reduce heat loss and to protect your plants against elements.
Ventilation & Temperature Control
Ventilation is incredibly important when it comes to making sure that the cold frame doesn’t overheat during sunny days. It’s suggested that you prop open the cover on warmer days and some people even add adjustable vents. Place a thermometer inside the cold frame and monitor the temperature to make the decision of when it needs to be opened or closed.
Choosing Plants
Once your cold frame is in place and completed, it’s time to select plants that will succeed in colder environments. Lettuce, spinach, carrots, and kale are all examples of cold tolerant vegetables that will thrive in a winter garden. Try experimenting with different crops to see what best fits your property.
Building a cold frame can be incredibly rewarding and extend your growing season further than ever. You can create a safe place for your plants with just a little time and materials, allowing for availability to harvest year-round. As you set out on your cold frame journey, remember that every frame is a unique creation, adjusted to everyone’s specific climate and gardening aspirations. Don’t forget to have fun with it. If you’d rather have a cold frame built by a professional, we would love to help! Contact us today for a FREE estimate.