80 Cheap and Easy DIY Greenhouse Ideas

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Extend your growing season when you live in a cooler climate on a budget with these cheap and easy DIY Greenhouse ideas.

There are full tutorials and plans for cold frames, a-frames, lean-to’s, hoop houses, miniature greenhouses, and much more. Many of these greenhouses use cheap building materials like pallets and repurposed materials like windows or doors that you can find at places like Habitat for Humanity or for free on the curb.

There are different size greenhouse projects to choose from, so whether you have tons of space or are looking for small greenhouse ideas, there are plenty of backyard greenhouse ideas for everyone. These DIY ideas will help you grow herbs, vegetables, tomatoes, and much more! You will find free plans and detailed instructions for these projects.

Mini DIY Greenhouse Ideas

DIY Window Greenhouse from Liz Marie

Countertop Greenhouse from Instructables

CD Case Greenhouse from Mega Crafty

How to Build Your Own Greenhouse (Mini Version) from Bepa’s Garden

Seedlings Starting with an Umbrella and Barrel Planter from Garden Therapy

Rotisserie Chicken Container Mini Greenhouse from Homesteading Downsized

Miniature Greenhouse from Old Windows from Global Garden Friends

Mason Jar Mini Greenhouse from Jennifer Rizzo

Mini-Greenhouse from Bepa’s Garden

Mini Little Window House from Crafts a la Mode

Cold Frame Ideas

Cold Frame Using an Old Window from Savvy Gardening

DIY Cold Frame How-To from Three Dogs in a Garden

Hay Bale Cold Frame from The Reid Homestead

Amish Cold Frame from In My Kitchen Garden

Hoop House Cold Frame from Gardenfork

Cold Frame with Auto Vent from Etsy

Tomato Cold Frame Tent Planter from Dunn Lumber

Cold Frame with Window Doors from Instructables

Wooden Cold Frame from Etsy

Quonset, Polytunnel & Hoop House Ideas

$25 Easy 5×5 Greenhouse from Instructables

$50 Hoop House from The Door Garden

Row Cover Hoop House from Bonnie Plants

Small Poly Tunnel from One Hundred Dollars a Month

Covered Greenhouse from Swing N Cocoa

Super Cheap Hoop House for Winter from QT’s Random Ramblings

Trampoline Greenhouse from How She Does

$50 PolyTunnel from Sow and Dippity

Hoop House from Southwestern Sunflower

Inexpensive Hoop-Style PVC Greenhouse Alberta Home Gardening

DIY Polytunnel from Gardening and Permaculture Design

300 Square Foot Windproof Hoop House from Natural Living Ideas

Simple and Inexpensive Greenhouse from Backwoods Home Magazine

DIY Cheap Greenhouse from Youtube

DIY PVC Pipes Greenhouse from Lady Lee’s Home

Greenhouse Kits on Amazon

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Repurposed DIY Greenhouses

Old Windows Greenhouse from Garden Therapy

Recycled Materials Greenhouse from Montana Wildlife Gardener

Plastic Bottle Greenhouse from Den Garden

Big, Low-Cost Glass Greenhouse Using Free Windows from The Green Lever

Old Windows Greenhouse from Instructables

Old Windows Greenhouse (with polycarbonate panels for the roof and cedar shakes trim) from Pinterest

Small Window A-Frame Greenhouses from Norrfrid

Antique Windows Greenhouse from Gardening in My Rubber Boots

Old Carport Garden Greenhouse from Instructables

Upcycled Greenhouse from A Small Life

Pallet Greenhouses

DIY Pallet Tent from Instructables

Pallet Urban Greenhouse from 1001 Pallets

Low-Cost Wood Pallet Greenhouse from The Green Lever

Free Pallet Racking Greenhouse from Gardener’s Path

Pallet Cold Frames from Roots and Boots

Pallet Greenhouse Garden Shed (source unknown)

Other DIY Greenhouses

Greenhouse Made from Old Windows from Simply Country Life

Attached Greenhouse from Tom’s Garden

Lean-To Greenhouse Plans from Etsy

$150 Simple Greenhouse from Bepa’s Garden

Underground Greenhouse from SHTF Preparedness

Basic Greenhouse with Polyethylene Sheeting from On the Farm

Sturdy Greenhouse in Colorado from  Weather Imagery

Lightweight Geodome DIY Greenhouse Plans from Northern Homesteaders

Barn-Style Greenhouse Plans with Step-by-Step Instructions from Ana White

Fold-Down Greenhouse from Bonnie Plants

Lean-to Greenhouse from Fabulessly Frugal

Greenhouse Gardening with Gutters from One Hundred Dollars A Month

Lumber and Plastic Paneling Greenhouse from The Elliot Homestead

DIY Hog Panel Greenhouse from Flower Patch Farmhouse

Greenhouse with Tuftex Panels from YouTube

Hobby Greenhouse from Homestead and Chill

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Looking for more garden ideas? Be sure to check out all our gardening posts, including container gardening ideas, landscaping, garden design, garden art, and much more!