Having a wooden cold frame greenhouse is a great way to extend your gardening season. It protects your plants from harsh weather conditions and also lets sunlight penetrate through the structure. You can use a cold frame for many different plants. They are especially useful for frost-tolerant crops. They can also be used for growing salad greens during the winter. Whether you have a small garden or a large one, a cold frame can help you grow a variety of vegetables.

The most common materials for cold frames are glass or polycarbonate. Depending on the type of crop, the amount of insulation around the frame may be critical. It is also important to have good air circulation. The top of the cold frame should be transparent, so you can easily access your plants. A hinged lid also makes it easy to reach your plants.

Cold frames are also a great way to start seeds. This helps you avoid the cost and pesticide treatments of nursery plants. Also, you can choose the hardiest and healthiest plants to grow. Having a cold frame can also protect your plants during dormancy.

Cold frames can be placed directly on the ground or nested into the ground. They are effective when you have a sunny southern or southeastern location. They can also be used to over-winter vegetables, such as leeks.

If you plan to use a cold frame for growing cool-weather crops, you may want to choose a portable model that is lightweight. The smallest models are a little over 4 feet long and 8 feet wide, while larger models are designed to be left in one spot. This will allow you to move the cold frame around the garden when it warms up in spring.

You can also choose a cold frame with glass panels that allow more sunlight to enter. These will make your plants more comfortable even when the temperatures are low. They are also much more durable and light-weight.

There are also a variety of cold frame designs to choose from, so you can find one that suits your needs. The best cold frames are also made from sturdy materials that can withstand wind and rain. You will also need to ensure that the cover is waterproof and transparent. You will also want to consider the size of the space you have to work with.

If you are planning to use a wooden cold frame, you will need to determine whether the structure is pre-treated. Some cold frames are made from polycarbonate, while others are made from fiberglass. Both materials are durable, but polycarbonate is more lightweight and can withstand wind better. If you decide to use a wooden cold frame, keep in mind that you will need to assemble the structure. This can take 30 minutes or so. You will need to keep track of the screws you use.

Another option is to purchase a pop-up cold frame. These portable models are inexpensive and easy to set up. You can also use them to create mini gardens.