What to Know Before Buying a Greenhouse: A Beginner’s Guide
If you’ve ever wondered what to know before buying a greenhouse, you’re in the right place! Buying a greenhouse is an exciting step toward sustainability, year-round growing, and creating a controlled environment for your plants. But before you dive in, consider a few key factors. This guide will walk you through the basics so you can confidently choose the right greenhouse for your space and growing goals.
Why It’s Important to Know Before You Buy
Greenhouses come in many sizes, styles, and materials, and while they all share the goal of protecting plants, the wrong setup can lead to poor plant health, wasted energy, and unnecessary expenses. Understanding your needs and options ahead of time will save you time, money, and frustration in the long run.
5 Key Things to Know Before Buying a Greenhouse
1. Size and Placement
The first step is deciding how much growing space you’ll need. Are you planning a few raised beds, a jungle of tropical plants, or a collection of seed-starting trays?
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Start with your garden goals and allow for extra space — many gardeners find they quickly outgrow their first greenhouse.
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Choose a spot with at least 6 hours of direct sunlight daily, easy access to water, and good drainage. Sheltered spots that avoid high winds are ideal.
- Leave room around the perimeter– Leave yourself as much room as possible around your greenhouse as you may find yourself pushing wheelbarrows, dumping soil, and also cleaning intricate parts of the greenhouse panels. The more space to work outside of your greenhouse, the better.
2. Material Options: Polycarbonate vs. Glass
Polycarbonate:
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Strong, lightweight, shatterproof, and flexible.
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Provides good insulation and diffuses sunlight, protecting plants from scorching.
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Slightly less light transmission compared to glass.
Glass:
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Traditional and visually appealing, especially with large panels like those found in Janssens greenhouses.
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Maximum light penetration, perfect for light-loving plants.
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Can require more maintenance for cleaning and algae control.
Tip: Consider your climate, plant needs, and budget when choosing between these materials.
3. Heating Options for Year-Round Growth
Depending on where you live and what you grow, you may need supplemental heat during colder months.
Popular options include:
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Electric or gas heaters for consistent warmth
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Passive solar heating using thermal mass (like water barrels or stone)
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Insulated greenhouse covers to retain heat
Make sure your greenhouse design includes space and ventilation for safe heating.
4. Airflow and Ventilation Essentials: Buying a Greenhouse Considerations
Proper airflow prevents overheating, reduces mold and pests, and promotes strong plant growth.
Look for greenhouses with:
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Roof vents and louvered side vents
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Automatic vent openers for hassle-free temperature control
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Circulation fans to move air evenly throughout the space
Good ventilation is just as important as heat retention, especially in warmer months.
5. Best Flooring Choices for Your Greenhouse
Your flooring affects everything from drainage to maintenance and plant health. Popular options include:
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Gravel and Wood Chips:
Affordable, excellent for drainage, and creates a natural look. However, it may shift or settle over time. -
Concrete with Chips or Pavers:
Durable, easy to clean, and retains heat well. Adding chips or pavers reduces slipperiness and softens the appearance.
Tip: Avoid bare soil floors, as they can promote pests and poor drainage.
Final Thoughts
Now that you know what to know before buying a greenhouse, you’re ready to start your greenhouse journey with confidence. From choosing the right size and material to ensuring good heating and ventilation, these basics will help you create a thriving, productive growing space you’ll enjoy for years to come.
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Thinking about greenhouse shopping soon? Pin or bookmark this guide so you can reference it while you plan your setup!