Greenhouse Buying Guide: How to Choose the Right Size for Your Backyard

Choosing a greenhouse comes down to three questions: how much space do you have, what will you grow, and how much wind and weather does your yard see? Here's a quick guide to help you pick the right one from our Polycarbonate Greenhouses collection.

What size greenhouse do I need?

For a few raised beds or a hobby garden, a 6' x 12' walk-in greenhouse (like our Enyopro 6x12) gives you standing-height growing space without dominating a small yard. For serious vegetable growing, herbs, and flowers with room for multiple beds, step up to a 10' x 18' model (1,512 cu. ft. of interior space). For a compact but still walk-in option with a taller wall design, an 8' x 12' A-frame greenhouse is a good middle ground.

What should I look for in the panels?

Polycarbonate panels are the standard for outdoor greenhouses because they're far more impact-resistant than glass and still let in 90%+ of sunlight while blocking 99%+ of UV. Panel thickness matters: 4mm twin-wall panels retain more heat than thinner single-wall panels, which helps extend your growing season into cooler months.

How much ventilation do I need?

More vents mean better temperature and humidity control, which matters most in hot climates or if you're growing heat-sensitive plants. A single adjustable roof vent is fine for casual use; look for 2-4 vents plus a sliding or double door if you want tighter climate control.

Will it hold up to wind and rain?

Look for a reinforced aluminum frame with triangular or diagonal bracing, and check the manufacturer's wind resistance rating if you're in a windy area. A built-in rain gutter system is worth having if you want to collect rainwater for your plants.

Frequently Asked Questions

Q: Can I leave a polycarbonate greenhouse up year-round?
A: Yes, as long as it's rated for outdoor use and properly anchored — all of the greenhouses in our collection are designed for permanent outdoor installation.

Q: Do these greenhouses come assembled?
A: No, all of our greenhouses ship flat-packed and require assembly; most include an instruction manual and basic tools.

Q: How much clearance should I leave around the greenhouse?
A: Leave at least 2-3 feet on all sides for airflow, maintenance access, and so doors can swing fully open.