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Greenhouses

About greenhouses

Greenhouses and coldframes are great options to raise the ambient temperature and allow you to grow in frosty weather, get a jump-start on your seed starting, or shelter delicate plants from the elements. Choose from our selection of coldframes, greenhouse plastic, or beautiful redwood greenhouse kits.

Regulate temperatures in your greenhouse or coldframe with automatic vent openers. If you are building your own greenhouse and need plans, or just want to know more, check out the DIY books that are our staff favorites.

FREE SHIPPING on Greenhouse Kits and any accessories that are ordered at the same time as a greenhouse to the Continental US!

Solar Bells (Set of 3)
Solar Bells (Set of 3)

SEF200

$24.99 As low as: $22.49
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Automatic Vent Opener - Standard Replacement Cylinder
Automatic Vent Opener - Standard Replacement Cylinder

SEF111

$19.99 As low as: $17.99
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sef115-cat.jpg
Automatic Vent Opener - Gigavent

SEF115

$129.00 As low as: $116.10
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Automatic Vent Opener - Standard
Automatic Vent Opener - Standard

SEF110

$39.99 As low as: $35.99
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Aluminum Snap On Hinge (1")
Aluminum Snap On Hinge (1")

SER259

$7.49 As low as: $5.62
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Snap Cross (1/2")
Snap Cross (1/2")

SER290

$1.69 As low as: $1.27
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Snap Cross (3/4")
Snap Cross (3/4")

SER291

$1.99 As low as: $1.49
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Coldframe Juwel All Season
Coldframe Juwel All Season

SEF106

$179.00
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Super Strong Woven Poly (36' Wide, Sold By The Ft)
Super Strong Woven Poly (36' Wide, Sold By The Ft)

SEG318

$17.98 As low as: $14.38
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Snap Cross (1 1/2")
Snap Cross (1 1/2")

SER294

$3.49 As low as: $2.62
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Snap Cross (1 1/4")
Snap Cross (1 1/4")

SER293

$3.09 As low as: $2.32
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Snap Cross (1")
Snap Cross (1")

SER292

$2.29 As low as: $1.72
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Super Strong Woven Poly (24' Wide, Sold By The Ft)
Super Strong Woven Poly (24' Wide, Sold By The Ft)

SEG306

$11.98 As low as: $9.58
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PVC Snap Fitting - 3 Way (1")
PVC Snap Fitting - 3 Way (1")

SER172

$3.39 As low as: $2.54
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PVC Snap Fitting - 4 Way (1")
PVC Snap Fitting - 4 Way (1")

SER175

$3.89 As low as: $2.92
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PVC Snap Fitting - 4 Way (3/4")
PVC Snap Fitting - 4 Way (3/4")

SER174

$3.49 As low as: $2.62
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PVC Snap Fitting - 4 Way (1/2")
PVC Snap Fitting - 4 Way (1/2")

SER173

$1.99 As low as: $1.49
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PVC Snap Fitting - 3 Way (3/4")
PVC Snap Fitting - 3 Way (3/4")

SER171

$3.19 As low as: $2.39
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PVC Snap Fitting - 3 Way (1/2")
PVC Snap Fitting - 3 Way (1/2")

SER170

$2.19 As low as: $1.64
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PVC Fitting 5 Way 1/2
PVC Fitting 5 Way 1/2

SER268

$3.19 As low as: $2.39
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PVC Fitting 5 Way 3/4
PVC Fitting 5 Way 3/4

SER269

$3.89 As low as: $2.92
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Super Strong Woven Poly (20' Wide, Sold by the Ft)
Super Strong Woven Poly (20' Wide, Sold by the Ft)

SEG305

$9.98 As low as: $7.98
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Redwood Patio Gardenhouse
Redwood Patio Gardenhouse

SEG505

$698.00
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Greenhouse Poly - Tufflite IV Clear (40' x 100' Roll)
Greenhouse Poly - Tufflite IV Clear (40' x 100' Roll)

SEG140D

$378.00 As low as: $340.20
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Greenhouse Poly - Tufflite IR Infrared (20' x 100' Roll)
Greenhouse Poly - Tufflite IR Infrared (20' x 100' Roll)

SEG120B

$279.00 As low as: $251.10
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Super Strong Woven Poly (30' Wide, Sold By the Ft)
Super Strong Woven Poly (30' Wide, Sold By the Ft)

SEG310

$14.98 As low as: $11.98
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Greenhouse Poly - Tufflite IV Clear (14' x 100' Roll)
Greenhouse Poly - Tufflite IV Clear (14' x 100' Roll)

SEG114

$179.00 As low as: $161.10
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Greenhouse Poly - Tufflite IV Clear (28' x 100' Roll)
Greenhouse Poly - Tufflite IV Clear (28' x 100' Roll)

SEG128

$298.00 As low as: $268.20
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Greenhouse Poly - Tufflite IV Clear (20' x 100' Roll)
Greenhouse Poly - Tufflite IV Clear (20' x 100' Roll)

SEG100B

$249.00 As low as: $224.10
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Greenhouse Poly - Tufflite IV Clear (24' x 100' Roll)
Greenhouse Poly - Tufflite IV Clear (24' x 100' Roll)

SEG124

$289.00 As low as: $260.10
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Super Strong Woven Poly (12' Wide, Sold by the Ft)
Super Strong Woven Poly (12' Wide, Sold by the Ft)

SEG302

$5.98 As low as: $4.78
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Triple Wall Polycarbonate Panel (4' X 8')
Triple Wall Polycarbonate Panel (4' X 8')

SEG408

$99.99 As low as: $79.99
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