Extending the Growing Season with Cold Frames

Cold frames offer a simple and effective way to prolong the growing season, allowing gardeners to harvest fresh produce well into fall and even winter. These structures, constructed from readily available materials like scrap wood and old storm windows, provide a protected environment for plants, shielding them from cold temperatures, excessive moisture, and wind.

Benefits of Cold Frame Gardening

Unlike heated greenhouses, cold frames don’t require complex equipment or significant investment. They typically offer a 5- to 10-degree temperature increase and protection from frost, making them ideal for starting seedlings or transplanting tender plants. Gardeners can enjoy a bounty of fresh vegetables and herbs, such as lettuce and strawberries, even during the holiday season when other sources may offer limited options.

Key Aspects of Cold Frame Construction and Care

This guide covers essential aspects of cold frame gardening, including: What a cold frame is, its various uses (starting seedlings, protecting plants), selecting the right location, constructing a frame, starting seeds, and caring for mature plants. For added protection on particularly cold nights, blankets can be added to the top of the frame. For even greater temperature control, a ‘hot bed’ can be created by adding heat to the frame.

Resources

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