Cold Frame for Year Round Use and Protection

A cold frame is a great way to extend the growing season for your plants, and with a little planning, you can use it year-round.

In fact, a well-designed cold frame can provide protection from extreme temperatures, wind, and even frost.

You can use a cold frame to start seeds in the spring, harden off seedlings in the summer, and even extend the harvest season in the fall.

A typical cold frame is made of wood or metal, with a transparent roof to let in sunlight and a bottom that can be vented to regulate temperature.

A coldframe can extend your gardening season by a few weeks, possibly even more, by providing a protected environment for your plants.

It's like adding a new dimension to your gardening, as the author puts it, where time doesn't normally exist.

A simple coldframe can be made from scrap materials, such as pine boards and plexiglass, and can be as small as a three-foot by six-foot rectangle.

The author's most elaborate coldframe was a purchased structure that looked like a miniature barn with a double-wall, polycarbonate plastic roof.

Having a coldframe can get your plants going and harvested sooner at the beginning of the season, and extend the season at the end.

The author's last coldframe eventually rotted away, but they still managed to insert that fourth dimension into their garden year.

With a coldframe, you can enjoy a longer gardening season, even after the hard freeze sets in.

A DIY cold frame is a great project for any home or farm. You can build one using old glass windows, a wooden frame, and some creativity.

The traditional form for a cold frame is a box with a sloping roof, with the roof highest along its north edge and sloping down an inch or two for every foot from back to front.

To start building your cold frame, you'll need to gather some basic tools and supplies, including a tape measure, saw, drill, and safety goggles. You'll also need some 2" x 2" wood pieces, clear plastic sheeting, and a pack of 2-1/2" decking screws for the frame.

Here's a list of the materials you'll need to build your own cold frame:

Once you have all the materials, you can start building your cold frame by constructing the base, adding vertical supports, and attaching the plastic sheeting.

A cold frame is essentially a box with a sloping roof, with the roof highest along its north edge and sloping down an inch or two for every foot from back to front, with the lowest point no less than a foot high.

The traditional cover for a cold frame is glass or plastic, mounted in a frame. Glass is an advantage due to its clarity and permanence, but it breaks easily.

You can use old window frames to get glass, but be aware that glass breaks easily, as I learned from my mischievous cat who loved to walk on my glass frames.

Plastic is a good alternative to glass, as it's lightweight and easy to cut to fit makeshift frames. However, it deteriorates with age and becomes less transparent to light.

Recommended read: Size Frames

I prefer plastic for covering my cold frames, but be aware that it can become a problem if it's not stored properly during the summer.

A well-sealed cold frame needs close attention to ventilation to prevent plants from overheating. My homemade cold frames were always leaky, which actually turned out to be a good thing, as it prevented overheating.

The base of the cold frame is made up of four pieces: two short horizontal base pieces and two long horizontal base pieces. The short pieces should be cut to the width of your raised bed.

Measure twice and cut once to ensure your cuts are exact, and use wood glue and 2-1/2" decking screws to attach the pieces together.

To build a DIY cold frame, you'll need the right tools and supplies. Here are the essentials:

A tape measure is a must-have for measuring the length and width of your raised bed. You'll also need a saw to cut the wood pieces, and a drill to pre-drill holes for the screws. An impact driver is optional but can come in handy for driving the screws. Large clamps will help you hold the wood pieces together while you assemble the frame.

Safety goggles and gloves are a good idea to protect yourself from sawdust and other debris. A right angle ruler will come in handy for measuring and marking the wood. A Dremel with a plastic cutting wheel can be used to cut plastic sheeting.

The types of wood you'll need are 2" x 2" wood pieces, which are actually 1-1/4 inches thick. You can use pressure-treated pine or other types of wood, but be sure to research the best option for your area.

Here's a list of the tools and supplies you'll need:

The Giantex kit is a solid choice for a DIY cold frame.

The frame is made of fir, a type of hardwood, which provides a sturdy base for the structure.

Polycarbonate panels are a great option for insulation, offering about the same level of insulation as glass without the added weight.

The top panel has hinges, allowing for easy opening and closing.

Discover more: How to Insulate a Cold Room

The hinge bolt locks into place, so you don't have to worry about propping it open with a stick.

This kit is designed to be taken apart and reassembled, making it perfect for frequent movers like myself.

Just remember to prop open the lid on sunny days, as the small space can heat up quickly and damage your plants.

Adding insulation and protection to your cold frame is a crucial step in creating a protected culture environment.

Cold frames are a popular choice for backyard growers because they offer several advantages, including a longer growing season, fewer pests, and lower watering needs.

One of the main reasons cold frames are so appealing is that they make it easy to build a structure that can withstand the elements.

A cold frame kit can be a great option for those who struggle with building a structure that won't collapse in the snow or blow away in the wind.

Here are some key things to keep in mind when adding insulation and protection to your cold frame:

Plastic Sheeting is a popular choice for building cold frames, and for good reason. It's easy to find in the roofing section of your local hardware store.

You can also use glass or plexiglass, but keep in mind that you'll need to have them cut to your specifications. If you're upcycling old windows, be aware that the dimensions of the glass will affect the measurements of your cold frame.

One option is to use corrugated plastic sheeting, like Kelly does in the instructions. This type of sheeting is a good choice because it's durable and can withstand the elements.

You can also use wood sheeting, but you'll need a clear material on the roof to let in sunlight. This is an important consideration, as sunlight is essential for plant growth.

Recommended read: Sleeping in a Cold Room Benefits

Here are some key things to keep in mind when working with plastic sheeting:

By following these tips and using the right type of plastic sheeting, you can create a cold frame that will protect your plants and extend the growing season.

Adding vertical supports is a crucial step in building your structure. It helps to provide stability and support for the roof.

Measure the internal distance from the base to the top in the back to determine the length of your back vertical support piece. Cut one piece to fit.

You'll need to find the halfway point to attach the back vertical support, marking the center with your pencil. Attach it securely.

Measure the interior distance between the bottom and top horizontal pieces in the front to determine the length of your front vertical support piece. Cut the piece to fit.

Find the halfway point to attach this vertical support piece, marking the center with your pencil. Attach it securely.

To add side vertical supports, find the halfway point between the two angled vertical pieces and mark with your pencil. Attach the side vertical support.

Repeat the process for the other side to ensure your structure is balanced and stable.

A cold frame is a great way to extend your growing season, and it's not just for winter. In fact, you can get year-round use out of a cold frame, using it to grow cool-season vegetables like lettuce and spinach in the winter, and cold-hardy vegetables and flowers in the spring.

The ideal site for a cold frame is a well-drained soil with a slope facing east or southeast, and it needs to receive full sun in winter. If you can snuggle it up near a fence, wall, or dense, evergreen shrub on its north side, it will keep even warmer in winter.

Some crops suitable for growing in a cold frame include lettuces, parsley, salad onions, spinach, radishes, and turnips, and you can use a cold frame to get a jump on spring by sowing cold-hardy vegetables and flowers in March. Even in summer, a cold frame can be used for propagating new plants by leafy cuttings, and in autumn, it can be used to hold potted bulbs for forcing or to overwinter plants just barely cold-hardy.

For your interest: Cold Weather House Plants

A cold frame can be used year-round, not just in winter. In fact, it's a great way to extend the growing season for many food and ornamental crops.

You can use a cold frame to grow cool-season vegetables like lettuce and spinach in the winter, and then transition to warm-season crops like tomatoes and peppers in the spring. This means you can have a continuous harvest from your garden, even in areas with cold winters.

In the spring, you can start seeds in a cold frame to get a head start on the growing season. This is especially useful for cool-season crops, which tend to have lower temperature thresholds for germination.

Even in the summer, a cold frame can be used to propagate new plants by leafy cuttings. The humid atmosphere inside the frame is ideal for this process.

In the fall, you can use a cold frame to hold potted bulbs for forcing, or to overwinter plants that are barely cold-hardy in your area. This is a great way to extend the growing season and get a jump on the next year's garden.

The ideal site for a cold frame is a well-drained soil with a slope facing east or southeast. This will help to maximize the amount of sunlight the frame receives, which is essential for plant growth.

See what others are reading: Cold Weather Succulent Plants

A bulb frame is a specialized kind of cold frame designed for growing hardy or almost hardy ornamental bulbous plants.

They are typically raised further above ground level than a normal cold frame, making it easier to admire the plants when they're in flower.

Cold frames are a simple yet effective way to extend the growing season and protect plants from frost. They utilize solar energy and insulation to create a microclimate within your garden.

Low-growing, cool-season plants are the best suited for cold frames, as they fare better in these conditions. These plants include lettuce, spinach, and herbs like cilantro and parsley.

The type of cold frame you use dictates how much protection you can offer your plants. A cold frame can be as simple as a structure with a transparent top and insulated sides, or as complex as a greenhouse on a farm.

The main conditions you need to monitor and control in a cold frame are temperature, sunlight, moisture, and wind exposure. This is especially important in the spring and fall when plants are more vulnerable to extreme weather conditions.