Build a Cold Frame: Grow Through the Winter

At Cropley’s Garden Center, we believe gardening doesn’t have to end with the arrival of cold weather. By building a cold frame, you can continue to grow and harvest fresh greens and root vegetables throughout the winter. Whether you’re an experienced gardener or new to the concept, a cold frame is a simple, rewarding project that lets you enjoy gardening year-round.

What is a Cold Frame?

A cold frame is a small, unheated enclosure that uses the sun’s warmth to create a protected environment for cool-weather crops. With a sturdy frame and a clear top, it shields your plants from frost while trapping heat, allowing you to grow vegetables like spinach, lettuce, and carrots even in winter.

Materials You’ll Need:

• Wood or bricks for the frame (cedar is an excellent, long-lasting choice)
• A clear cover such as plexiglass, plastic, or repurposed windows
• Hinges for easy ventilation
• Rich soil and compost for planting
• Basic tools like a saw, hammer, and screws

How to Build Your Cold Frame:

1. Find the Right Spot
   Choose a location with southern exposure to capture the most sunlight throughout the day. Make sure the ground is level for stability and proper drainage.
2. Construct the Frame
   Build a rectangular frame, typically around 3 feet by 6 feet. The back of the frame should be taller than the front to create a slope that helps rain and snow slide off easily.
3. Attach the Transparent Cover
   Secure the clear cover with hinges so it can be propped open for ventilation on warmer days. The cover will trap warmth inside, creating the perfect environment for your plants.
4. Prepare the Soil
   Inside the frame, mix compost into the soil to ensure it’s nutrient-rich and well-draining. Consider adding a layer of mulch or straw for extra insulation on colder nights.
5. Plant Cold-Hardy Vegetables
   Cold frames are ideal for growing crops that thrive in cool weather, such as:
   • Leafy greens like spinach, kale, and arugula
   • Root vegetables like carrots, radishes, and turnips
   • Hardy herbs like parsley and thyme

Caring for Your Cold Frame:

• Ventilation is Key: On sunny winter days, open the top slightly to allow airflow and prevent overheating. Proper ventilation helps maintain a healthy environment inside the cold frame.
• Monitor the Temperature: Keep the internal temperature between 40°F and 65°F. On especially cold nights, insulate the frame with blankets or place straw bales around the outside.
• Water Sparingly: Plants in cold frames require less water than in warmer months. Keep the soil moist but avoid overwatering to prevent root issues.

Why Build a Cold Frame?

• Extend Your Harvest: With a cold frame, you can enjoy fresh produce well into winter, making the most of your growing season.
• Improved Flavor: Cold-hardy crops like carrots and spinach often develop a sweeter taste when exposed to light frost.
• Sustainable Gardening: Growing in a cold frame helps reduce your reliance on store-bought produce, allowing for a more sustainable, homegrown approach to winter gardening.

Let Us Help You Get Started

At Cropley’s Garden Center, we have all the materials and expertise you need to build your cold frame. From quality lumber to premium seeds, our team is here to help guide you through every step of the process.

Visit Cropley’s Garden Center today to start planning your cold frame and keep your garden growing all year long. Let’s make winter gardening part of your seasonal routine!