How to Build a Greenhouse for Less Than $50 Without Any Tools

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John shares how he built a greenhouse for cheap and how he is going to use it.

Creating a functional and budget-friendly greenhouse can seem like a daunting task for many gardening enthusiasts. However, with the right materials and a bit of ingenuity, it’s possible to construct an inexpensive greenhouse that not only protects your plants but also contributes to your gardening success. This article will provide insights on various DIY greenhouse designs that cater to gardeners on a budget and offer practical solutions for an affordable in-home growing space.

In today’s eco-conscious world, repurposing materials, such as old windows or PVC pipes, can be a cost-effective and environmentally friendly approach to building a greenhouse. By utilizing readily available resources and following simple instructions, you can create a greenhouse structure that fulfills your gardening needs while minimizing expenses. From simplistic hoop greenhouses to more elaborate designs, the possibilities are endless when it comes to constructing a greenhouse that caters to your individual preferences and budget constraints.

Building a cheap greenhouse not only benefits your wallet but also provides your plants with the protection and nurturing environment they need to thrive. By selecting the appropriate design and employing creative construction methods, you can bring your gardening aspirations to life without breaking the bank. As we delve into various DIY greenhouse plans, you’ll be well-equipped to embark on the journey of constructing an affordable and effective greenhouse tailored to your gardening endeavors.

Choosing the Right Greenhouse Design

When considering how to build a cheap greenhouse, it’s essential to select a design that best suits your needs and fits within your budget. The following greenhouse designs offer several options for gardeners looking for affordable yet effective ways to grow their plants.

A-Frame Greenhouse

The A-Frame greenhouse is a simple and easy-to-build design that can be constructed with wood or metal supports. This design allows for a sloped roof that utilizes polycarbonate sheets or greenhouse plastic, providing protection and ventilation.

  • Affordable to build
  • Space-efficient design
  • Easily ventilated

Barn-Style Greenhouse

The Barn-Style greenhouse is a versatile option that can be built to various sizes. This design uses wood or metal framing and features a high, peaked roof for increased growing space.

  • Customizable size
  • Extra vertical space
  • Classic, attractive design

Geodome Greenhouse

The Geodome greenhouse is a unique and eye-catching option that utilizes a geodesic dome structure. This design provides excellent insulation and can be built using wood, metal, or PVC supports.

  • Energy-efficient
  • Distinct appearance
  • Resilient to harsh weather

Lean-To Greenhouse

A Lean-To greenhouse is an excellent option for gardeners with limited space, as it attaches directly to an existing structure. This design can utilize wood, metal, or aluminum supports and often features polycarbonate or glass covering.

  • Space-saving
  • Usually cheaper to build
  • Can utilize an existing wall for insulation

Miniature Greenhouse

A Miniature greenhouse is a compact option for small gardens or patios. This design is usually portable, made of aluminum, and covered with polycarbonate sheets or greenhouse plastic.

  • Affordable and easy to assemble
  • Ideal for small spaces
  • Portable and easy to move

Wooden Cold Frame

The Wooden Cold Frame is a simple, low-cost option for protecting plants during the colder months. It consists of a wooden box with a clear lid (can be glass or plastic) that can be lifted or removed for ventilation.

  • Budget-friendly
  • Easy to build and maintain
  • Perfect for seasonal use

By evaluating the various greenhouse ideas and designs, gardeners can choose the perfect DIY greenhouse to meet their needs while remaining within their budget.

Materials and Tools

Cedar Lumber

Cedar lumber is a popular choice for building greenhouses due to its natural resistance to rot and moisture. It can be relatively affordable, especially if you are able to source reclaimed or discounted wood. To build a greenhouse with cedar lumber, you will need framing materials such as 2x4s, screws or nails, a saw, drill, and level.

Recycled Materials

Using recycled materials can be an economical and eco-friendly way to build a greenhouse. Old windows or doors, for example, can be re-purposed as walls and roof panels. Consider searching for materials at local thrift stores, yard sales, or online marketplaces to save on costs. Be prepared to invest time in cleaning and refurbishing these materials before use.

PVC Pipe

PVC pipe is an inexpensive, lightweight, and easy material to work with when constructing a greenhouse. It can be used as a frame, requiring various lengths of pipe, connectors for joints, and plastic sheeting to cover the structure. Tools needed for assembly include a PVC pipe cutter, measuring tape, and zip ties to secure the plastic sheeting.

Plastic Sheeting

Plastic sheeting is a versatile and cost-effective material for covering greenhouses. It can be found in various thicknesses and can be easily cut to size with scissors or a utility knife. To secure the plastic sheeting to the greenhouse frame, you will need zip ties, duct tape, or clips, depending on the framing material.

Connectors

Connectors are essential for giving stability and structure to your greenhouse. They can be used in combination with PVC pipes, wood or metal frames, and are available in various shapes and sizes. Ensure you have the correct type and size of connectors for the materials you are using, along with the relevant tools to fasten them together.

Greenhouse Kits

Greenhouse kits are a convenient solution for DIY gardeners on a budget. They usually include all necessary materials and step-by-step instructions to help streamline the construction process. Keep in mind that kits can vary in quality, so it’s essential to choose one that meets your needs and budget. Assembly generally requires standard tools such as a drill, level, and tape measure.

In summary, building a cheap greenhouse involves selecting the appropriate materials and tools for your needs. Options include cedar lumber, recycled materials, PVC pipe, plastic sheeting, connectors, and greenhouse kits. Ensure you have the necessary tools and a solid plan to construct a functional and affordable greenhouse project.

Building the Frame and Foundation

Wood Frame

Building a DIY greenhouse with a wood frame is an affordable and sturdy option for your backyard. Start by selecting lumber that is pressure-treated or naturally resistant to decay, such as cedar or redwood. The frame can be designed in various shapes, like a simple A-frame or a more elaborate barn-style structure. For the walls and roof, attach corrugated metal or greenhouse plastic panels to the wooden frame.

PVC Pipes

Another budget-friendly option for constructing a backyard greenhouse is using PVC pipes. This lightweight material is easy to work with and can be cut to various lengths to create the desired shape and size of your greenhouse. Begin by cutting PVC pipes to the required dimensions and connecting them with PVC fittings. Secure the frame by driving rebar or stakes into the ground, and then slide the PVC pipes over them. Attach greenhouse plastic or polycarbonate panels to the PVC frame to complete the structure.

Foundation

A strong foundation is essential for any greenhouse, ensuring its stability and longevity. Follow these steps for building a solid foundation:

  1. Decide on the location for your greenhouse, considering factors like sunlight, wind, and accessibility.
  2. Clear and level the area, and mark the positions of the footings.
  3. Dig frost footings to a depth that extends below the frost line in your region. This prevents frost heaving and movement of the foundation.
  4. Prep the hardware, such as rebar or anchor bolts, that will be used to secure the greenhouse to the foundation.
  5. Pour concrete footings and install the hardware while the concrete is still wet. Ensure that the footing tops are level.
  6. Create a box frame, using either lumber or concrete blocks, which will support the greenhouse structure.
  7. Attach the greenhouse frame to the foundation using the installed hardware.

Remember to follow local building codes and regulations when constructing your DIY greenhouse. This ensures a safe and long-lasting structure for your plants and gardening needs.

Maximizing Sun Exposure and Water Access

Location

When selecting a location for your greenhouse, it is crucial to consider the garden’s layout and proximity to electricity and water sources. Most gardeners prefer a site close to these utilities for easier access and functionality. Moreover, ensure that the ground is level or near level for a stable foundation.

Sun Exposure

Proper sun exposure is essential to promote healthy plant growth in your greenhouse. To maximize sun exposure, position the greenhouse facing south and keep the sky unobstructed. This orientation captures the most sunlight during the cold months, providing ample warmth for plants. To determine the best placement for your greenhouse, consider using a sun path chart for your location. This tool will help you understand the sun’s movement throughout the year and identify the ideal spot for maximum light exposure.

Water Access

Having a convenient water source is crucial for maintaining your greenhouse plants. Some ways to ensure water access include:

  • Position your greenhouse close to a water source such as a tap, well, or water tank.
  • Install a rainwater harvesting system to collect water for your garden, which can include gutters and storage barrels.
  • Consider using an irrigation system or drip lines to efficiently water plants and conserve resources.

By taking these factors into consideration, you can effectively maximize sun exposure and water access for your greenhouse, leading to a thriving garden environment.

Assembling Your Greenhouse

Door Garden

A DIY greenhouse can be an excellent addition to your backyard or hobby garden. When building the structure, make sure to leave space for a door garden. This will allow you to maximize the functionality of the entrance, providing room for potted plants, herbs, or small vegetables. To create a door garden, simply add sturdy shelves or hooks on the interior side of the door to hold containers or hanging baskets. This will make for an attractive and practical entry into your greenhouse.

Shelves

Installing shelves in your greenhouse is essential for organized and efficient use of space. They help you manage various plants at different growth stages and optimize sunlight exposure. There are several types of shelving materials you can use:

  • Wood: Treated lumber is a popular choice for greenhouse shelves, as it is affordable and offers a natural look. Apply a water sealant to the wood before installing it, as this will extend its lifespan in the moist environment.
  • Metal: Metal shelves are durable and offer excellent support for heavy plants. They can be powder coated to prevent rust and blend seamlessly with the structure of the greenhouse.
  • Plastic: Lightweight and easy to clean, plastic shelves are a cost-effective option. Just ensure they have proper drainage holes to avoid water accumulation.

In your greenhouse, consider using a variety of shelf heights and depths to accommodate plants of different sizes.

Shed

A small shed or storage area in your backyard greenhouse can be invaluable for keeping tools, supplies, and other equipment organized and within reach. When designing your greenhouse, consider allocating some space for a shed. It could be an enclosed section within the greenhouse or a standalone structure positioned nearby. Make sure to include the following features:

  • Shelving and Hooks: Install shelves and hooks for tools, pots, and other items you use regularly.
  • Ventilation: Ensure proper air circulation inside the shed to avoid excessive humidity and condensation.
  • Lighting: Incorporate adequate lighting to make it easy to find and access items, especially during low-light conditions.

Remember to keep your shed organized and clutter-free to make your greenhouse experience more enjoyable and productive.

Protecting Plants in Extreme Conditions

Gardeners know that extreme weather conditions can be challenging for maintaining a healthy garden. With a simple and budget-friendly greenhouse, it’s possible to shield plants from harsh climates and enable successful growth. This article will discuss how a well-constructed greenhouse can protect your plants from high winds, frost, and snow.

High Winds

High winds can lead to damaged and uprooted plants, and can also interfere with pollination in gardens. A greenhouse provides a solid barrier against these winds, ensuring the safety of delicate plants. To protect against strong winds, be sure to:

  • Build a sturdy greenhouse frame made from materials such as PVC, wood or metal.
  • Anchor the structure firmly to the ground and make sure it is secure.
  • Use reinforced polyethylene or polycarbonate greenhouse coverings for added durability and strength.

Frost

Frost can be a gardener’s worst enemy, especially during the early spring when young seedlings are just beginning to grow. A greenhouse can help regulate the temperature, keeping frost from settling on plants and causing irreparable damage. To protect plants from frost in a greenhouse:

  • Add insulation layers, such as bubble wrap or foam sheets, to the interior walls of the structure.
  • Consider installing a small greenhouse heater for added warmth on particularly cold nights.
  • Monitor the temperature inside the greenhouse to maintain a consistent climate for the plants.
  • Keep plants off the ground by using suspended trays or shelves to prevent frost from affecting the roots.

Snow

Heavy snow can pose a threat to plants by weighing down the branches and potentially damaging the plant’s structure. A greenhouse can shield plants from these conditions and keep the snow outside. To handle snowfalls within your greenhouse:

  • Build your greenhouse with a steeply pitched roof to prevent snow accumulation and facilitate shedding.
  • Remove accumulated snow from the roof regularly using a soft broom or similar tool to prevent damage to the greenhouse.
  • Provide proper ventilation to aid in melting any snow that might enter the greenhouse, ensuring a proper climate for the plants inside.

By establishing a simple, cost-effective greenhouse, gardeners can create a nurturing environment for their plants to thrive, even during extreme weather conditions such as high winds, frost, and snow.

Extending Growing Season

Cold Frame

Cold frames are a simple, cost-effective way to extend the growing season and protect plants from harsh weather conditions. A DIY cold frame can be built using readily available materials, such as old windows, pallets, or even rotisserie chicken containers. The key features of a cold frame include insulation to maintain temperature, air circulation to ventilate the space, and adjustable covering for controlling sunlight exposure.

To build a cold frame:

  1. Choose a suitable location with sufficient sunlight and protection from strong winds.
  2. Create a sturdy base using materials like bricks, wood, or cinder blocks.
  3. Attach a transparent, insulated top (such as an old window) as a lid, which can be propped open to regulate temperature.
  4. Fill the cold frame with soil and plant your desired seedlings or crops.

10-Foot Greenhouse

A 10-foot greenhouse is an excellent option for those looking to extend their growing season without breaking the bank. One such example is the Quictent 20- x 10- x 7-foot Hoop-Style Greenhouse, which features a double-layer cover of transparent polyethylene, doors at both ends, and hook-and-loop fastener-sealed windows. Assembly is relatively simple, making this greenhouse suitable for DIY enthusiasts.

To build a 10-foot Hoop-Style Greenhouse:

  1. Assemble the framework using PVC pipes, metal poles, or wooden beams, ensuring proper support and stability.
  2. Cover the framework with a durable, transparent material like polyethylene, which provides insulation and allows the right amount of sunlight to enter.
  3. Attach doors to both ends for easy access and ventilation.
  4. Secure windows with hook-and-loop fasteners to control temperature and maintain optimal growing conditions indoors.

By utilizing a cold frame or a 10-foot greenhouse, gardeners can effectively extend their growing season and protect their plants from harsh external elements. DIY solutions such as these provide affordable, practical ways for home gardeners to make the most of their space and enjoy fresh produce year-round.

Growing Different Plants

A greenhouse provides a controlled environment for gardeners to grow a variety of plants. In this section, we will discuss how to grow herbs and tomatoes in your budget-friendly greenhouse.

Herbs

Herbs are a great choice for greenhouse gardening due to their relatively low maintenance requirements and usefulness in the kitchen. To grow herbs in your greenhouse, follow these tips:

  • Choose a mix of perennial and annual herbs such as basil, parsley, cilantro, oregano, and rosemary.
  • Make sure the greenhouse temperature is consistently maintained between 50-70°F.
  • Plant the herbs in pots or raised beds, ensuring proper drainage.
  • Allow at least 18 inches between each herb plant to avoid overcrowding.
  • Water the herbs as needed, avoiding overwatering, which can lead to root rot.
  • Provide proper ventilation to avoid the risk of fungal infections.

Tomatoes

Tomatoes are another popular choice for greenhouse gardeners because they thrive in controlled conditions. To successfully grow tomatoes in your greenhouse, follow these tips:

  • Choose a suitable tomato variety such as cherry, beefsteak, or heirloom tomatoes.
  • Plant the tomatoes in pots or raised beds with adequate spacing of at least 2 feet.
  • Maintain a consistent greenhouse temperature of 60-75°F during the day and 55-65°F during the night.
  • Water the tomato plants regularly, keeping the soil evenly moist without overwatering.
  • Ensure proper ventilation because tomatoes are susceptible to fungal diseases in stagnant air.
  • Support the tomato plants with stakes or cages to prevent the stems from breaking as the plants grow.

By following these tips for herb and tomato cultivation in a budget-friendly greenhouse, gardeners can enjoy a diverse selection of fresh, high-quality produce all year round.

Budget Tips for Greenhouse Construction

Inexpensive Alternatives

There are several inexpensive alternatives to traditional greenhouse materials. A few options include:

  • PVC pipe: It’s lightweight, easy to work with, and relatively inexpensive. It can be used as a frame for your greenhouse.
  • Polycarbonate or greenhouse plastic panels: Such panels are cost-effective alternatives to glass or tempered glass.
  • Plastic sheeting: Also known as plastic film, it’s a cheap and effective way to enclose the greenhouse.

DIY Greenhouse Plans

Building a greenhouse from scratch offers more customization and can save on costs. Some DIY greenhouse plan ideas include:

  1. Hoop greenhouse: Made with PVC pipe, connectors, zip ties, and plastic sheeting, it’s an affordable option for a small greenhouse. PondPlantGirl on Instructables has detailed instructions for building one for under $25.
  2. 2×4 framed greenhouse: Constructed using 2×4 framing lumber and polycarbonate or greenhouse plastic panels, it’s a robust yet affordable choice. Bob Vila’s website offers downloadable plans.

Lean-To Greenhouse Plans

A lean-to greenhouse is built against an existing wall or structure, which can save on materials and costs. The heat from the building may even help reduce temperature fluctuations inside the greenhouse. Lean-to greenhouse plans can vary in complexity, but building one from scratch allows for customization and can be a budget-friendly option.

Budget Greenhouse Kits

Greenhouse kits are pre-packaged sets that include all the necessary materials to assemble a greenhouse. Budget greenhouse kits are an affordable alternative to purchasing a fully constructed greenhouse or building one from scratch. Look for kits made from PVC pipe or with polycarbonate panels, as these tend to be more affordable. When shopping for greenhouse kits, compare prices and features across various retailers to ensure you find the best budget option that suits your needs.

Conclusion

In conclusion, building a cheap greenhouse is achievable with a bit of creativity and resourcefulness. Utilizing materials such as old windows, 2×4 framing lumber, and polycarbonate or greenhouse plastic panels can be both cost-effective and environmentally friendly.

Some key steps to constructing an affordable greenhouse include:

  • Collecting inexpensive or recycled materials like old windows, pallets, or plastic sheeting.
  • Choosing a model and size that fits your needs and budget, such as a mini greenhouse for growing herbs and vegetables.
  • Implementing DIY greenhouse plans from reliable sources, like those found on Bob Vila, The Spruce, or Instructables.

A greenhouse provides many benefits for gardeners, including constant temperature control, protection from harsh weather conditions, and an extended growing season. With careful planning and ingenuity, it is possible to construct a greenhouse without breaking the bank, allowing you to enjoy fresh produce and flowers all year long.