Coldframe

Coldframe

A Coldframe is a transparent-roofed enclosure, built low to the ground, used to protect plants from adverse weather, primarily excessive cold or wet. The transparent top admits sunlight and prevents heat escape via convection that would otherwise occur, particularly at night. Essentially, a coldframe functions as a miniature greenhouse to extend the growing season.

History

Historically, coldframes were built to supplement a kitchen garden and extend the growing season into the colder months. They were primarily used in the Victorian era and were made from brick or stone with a glass top. The concept of the coldframe has been around for centuries and is still used today in modern gardening.

Construction and Materials

Coldframes are typically constructed with a wooden or plastic frame and a transparent roofing material such as glass or clear plastic. The back of the coldframe is usually taller than the front to allow the roof to slope and capture more sunlight. The frame is filled with soil or compost, and plants are directly sown into the medium.

Usage

Coldframes are used for propagation of seedlings, to extend the growing season, and to harden off plants before they are moved outdoors. They can also be used for growing vegetables and herbs throughout the winter months. The temperature and humidity inside the coldframe can be controlled by adjusting the lid.

Advantages and Disadvantages

The main advantage of a coldframe is that it allows for an extended growing season. It also provides a controlled environment for young plants. However, they require careful monitoring to prevent overheating and to ensure adequate ventilation.

See Also

• Greenhouse
• Gardening
• Propagation (plant)