You’ve probably seen plastic stretched over a frame on a garden box, backyard structures with plants growing in them, or large commercial buildings with plastic walls glowing at night, full of seedlings for the next season. All these structures are considered greenhouses. But what is a greenhouse, and what makes these structures different from others?

What is a Greenhouse?

A greenhouse is a structure created to maintain a suitable growing environment for growing plants. The walls and ceiling are usually covered with transparent material to allow sunlight in and trap heat, a process known as the greenhouse effect (Britannica). Gardeners, horticulturists, and commercial growers use them to extend growing seasons, protect plants from harsh climates and pests, and cultivate plants not native to the local environment. Greenhouses are desirable because of the precise control over factors such as temperature, humidity, and light, which can increase plant growth and productivity.

Types of Greenhouses

There are many different types of greenhouses, each designed to suit specific needs and environments. Each has advantages and considerations based on climate, available space, budget, and intended use. The most common types of greenhouses include:

Traditional Freestanding Greenhouse

The classic standalone greenhouses provide a controlled environment for growing plants and offer flexibility in size and design. They usually have a wood or metal frame covered with transparent glass, polycarbonate, or plastic sheeting.

Perks of a traditional greenhouse:

Full exposure to sunlight from all sides
Customizable size and design for specific gardening needs
No reliance on existing structures for support or utilities
Can be placed anywhere on the property with adequate space
Offers complete control over the growing environment

Why Polycarbonate is Popular

Polycarbonate panels offer excellent insulation properties, are nearly unbreakable compared to glass, and provide diffused light that reduces hot spots while maintaining optimal growing conditions for plants. They are also more cost effective than glass.

Lean-to Greenhouse

This is similar in structure to a standalone greenhouse. The main difference is that a lean-to is attached to an existing building, such as a house or garage, and shares one of its walls. The lean-to is popular for those with limited space or in high-wind areas where extra stability is needed.

Advantages of lean-to greenhouses include:

Lower construction costs due to shared wall
Easy access to utilities from the main building
Protection from prevailing winds
Space-efficient for smaller properties
Can utilize existing building heat

Geodesic Dome Greenhouse

Geodesic domes are spherical and partial-spherical structures of interconnected triangles. This type of structure is known for its strength and efficient use of materials. They can add a unique feature to a growing space but are not as flexible in size and design.

Benefits of geodesic dome greenhouses:

Maximum interior space with minimal surface area
Exceptional structural strength
Efficient heat distribution
Unique aesthetic appeal
Excellent wind resistance

Design Considerations

While geodesic domes are structurally impressive, they can be more complex to construct and may have limitations for standard shelving and equipment placement due to their curved walls.

Greenhouse Type	Best For	Space Required	Cost	Complexity
Freestanding	Maximum flexibility and space	Large yards	Medium to High	Moderate
Lean-to	Small spaces, convenience	Minimal	Low to Medium	Low
Geodesic Dome	Unique design, efficiency	Medium	Medium to High	High

Benefits of Greenhouse Growing

Understanding what a greenhouse offers helps explain why they’re so valuable for plant cultivation:

Extended growing seasons – Grow plants year-round regardless of outdoor weather
Climate control – Maintain optimal temperature and humidity levels
Protection from pests – Physical barrier against insects and animals
Weather protection – Shield plants from storms, hail, and extreme temperatures
Improved plant quality – Consistent conditions lead to healthier, more productive plants
Water efficiency – Reduced evaporation and precise watering control

Ready to Start Your Greenhouse Journey?

Whether you’re interested in a compact lean-to or a spacious freestanding greenhouse, we have solutions designed for every gardener’s needs and budget.

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Choosing the Right Greenhouse for You

When selecting a greenhouse type, consider these key factors:

Available Space

Measure your available area carefully. Remember to account for door clearance, ventilation requirements, and future expansion possibilities.

Budget Considerations

Factor in not just the initial structure cost, but also foundation preparation, heating systems, ventilation, and ongoing operating expenses.

Intended Use

Consider what you plan to grow. Starting seedlings requires different conditions than growing tropical plants or maintaining a year-round vegetable garden.

Local Climate

Your local weather patterns will influence material choices, heating requirements, and structural considerations for snow loads and wind resistance.

What is a Greenhouse? A Complete Guide