Width range
14–34 ft
Any length in multiples of 4 ft
CT Greenhouse high tunnels are NRCS-eligible · see how EQIP funding works
Entry model
Grower Series High Tunnels, sized for the market garden.
Every Grower starts with the same commercial-grade frame we build into the Plus and Pro. The difference is simplicity: everything you need to get a high tunnel up and growing, with doors, ventilation upgrades, and other accessories added on your own timeline.
The Grower is a starting point, not a box: width, length, height, end walls, and hardware all configure to your operation.
NRCS-eligible
Configurable to your site
Farmer-owned
Main bow tubing
1.9" 13-ga
Galvanized steel, bolted connections
Top covering
Single-layer 6-mil
Inflated double layer available
Configuration
Every Grower starts from your farm.
Each kit is configured on your quote: width, length, sidewall height, end walls, doors, and hardware.
Dimensions
Any width from 14 to 34 ft in 2-ft steps, any length in multiples of 4 ft, and standard (5 ft) or tall (6 ft) sidewalls.
End walls & doors
Steel-framed end walls: poly film on the Grower, twin-wall polycarbonate on the Plus and Pro. Doors are 8' x 7' double doors (two 4' doors), hinged or sliding.
Ventilation & sides
Roll-up sides with a 5:1 locking gear crank (7:1 or 13:1 heavy-duty cranks for longer tunnels). Options include a ridge vent package and roll-up automation (motor and controller), and powered peak vent openers are available.
The numbers
Specifications by model
Your model is highlighted. All four models are configured to your site.
| Specification | Grower | Grower Plus | Grower Pro | Powerhouse |
|---|---|---|---|---|
| Main bow tubing | 1.9" 13-ga galvanized | 1.9" 13-ga galvanized | 1.9" 13-ga galvanized | Configured with you |
| Purlins | 1.315" 16-ga | 1.315" 16-ga | 1.315" 16-ga | Configured with you |
| Hardware | Grade 5 bolts, wirelock hip boards | Grade 5 bolts, wirelock hip boards | Grade 5 bolts, wirelock hip boards | Configured with you |
| Width range | 14–34 ft | 14–34 ft | 14–34 ft | Configured with you |
| Top covering | Single-layer 6-mil | Double-inflated 6-mil | Double-inflated 6-mil | Double-inflated 6-mil |
| End walls | Steel-framed, 6-mil poly | Steel-framed, 8mm twin-wall polycarbonate | Steel-framed, 8mm twin-wall polycarbonate | Configured with you |
| Doors | Add-on | 8'×7' double hinged | 8'×7' double sliding | Configured with you |
| Roll-up sides | Manual, 5:1 gear crank | Manual, 5:1 crank, bug netting | Manual, 5:1 crank, Solarside woven sides, bug netting | Configured with you |
| Peak vents | Add-on | Automatic, no power needed | Automatic, no power needed | Configured with you |
| Baseboards | Hardware for local lumber | Hardware for local lumber | Steel + polycarbonate system | Configured with you |
| Trellis | Add-on | Add-on | Cable support system included | Configured with you |
In the kit
What's in the kit
- Frame: 1.9" 13-gauge galvanized main bows with a 16-gauge truss on every bow, 1.315" 16-gauge purlins and ridge, 1.75" 14-gauge square end wall framing, and ground posts.
- Hardware: Grade 5 bolts at every major connection, stainless steel wiggle wire and self-tapping screws, and aluminum double wirelock hip boards.
- Covering: a single layer of 6-mil, 4-year UV-rated greenhouse plastic, with steel-framed end walls covered in the same film.
- Roll-up sides: 5:1 locking gear-crank operators and aluminum fabric clips, plus corner wind braces.
- Baseboard hardware: everything needed to attach locally sourced lumber (we recommend 2x10s). Doors are an add-on on the Grower.
- Build guidance: written assembly instructions, and an owner available by phone.
Planning to apply for EQIP cost-share?
This structure is designed to meet NRCS Conservation Practice Standard 325, and we supply the documentation your application needs. Eligibility and cost-share rates vary by state, and we'll point you to yours.
Common questions
Asked about the Grower.
Yes, a small crew can put it up, it runs without power, and it uses the same galvanized steel frame as the larger kits.
1.9" 13-gauge steel main bows with a 16-gauge truss on every bow, 1.315" 16-gauge purlins and ridge, 1.75" 14-gauge square end wall framing, a single layer of 6-mil, 4-year UV-rated greenhouse plastic, aluminum double wirelock hip boards, Grade 5 bolts, stainless self-tapping screws, and 5:1 gear-crank roll-up operators. Baseboard lumber and doors are sourced separately; the kit includes the hardware to attach your lumber.
Yes. The Grower is designed to meet NRCS Conservation Practice Standard 325, the standard EQIP reviews high tunnels against, and we supply the documentation your local NRCS office needs. Eligibility and cost-share rates vary by state, so confirm sizes and rates with your state's office.
Any width from 14 to 34 feet in 2-foot steps, any length in multiples of 4 feet, and a choice of standard (5′) or tall (6′) sidewalls. The most-ordered configuration is 30 x 96. Under NRCS contracts a single tunnel is commonly capped around 2,880 square feet, though caps vary by state.
The main bows are 1.9" diameter, 13-gauge galvanized steel, heavier than the 16-gauge hoops many kits use, with a 16-gauge truss bolted on every bow. The structural tubing is American-made. A lower gauge number means thicker, stronger tubing.
Yes. The inflated double-layer top, polycarbonate end walls, doors, peak vents, bug netting, a steel baseboard system, and roll-up automation are all available as upgrades. Talk to us about which can be added to a tunnel you already own.
Let's configure your Grower.
Tell us about your operation and an owner will follow up with a quote for your site. Ask us about EQIP cost-share; rates vary by state.
(860) 341-8707 · info@ctgreenhouse.com
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