Grower Pro Series High Tunnel

‚úì Designed to Meet NRCS Practice 325 (CPS 325)

The Grower Pro Series High Tunnel meets the requirements under USDA NRCS Conservation Practice Standard 325 for the Environmental Quality Incentives Program (EQIP). CT Greenhouse is an NRCS-eligible vendor, and our structures have been approved in every state where they've been submitted for review. Confirm eligibility for your specific project with your local NRCS office. Learn more about NRCS high tunnel funding.

Already have your NRCS grant? Call us at 860-341-8707 and we'll configure your tunnel to maximize your reimbursement.

Sizing tip: NRCS grants typically approve structures up to 30′ × 72′ (2,160 sq ft). Need help matching your tunnel to your approved specs? Give us a call and we'll walk through it with you.

What's in the Grower Pro Kit

Frame & Structure

• 1.9‚Ä≥ 13-gauge galvanized steel main bows ‚Äî commercial-grade American-made tubing engineered for wind and snow loads. This is a heavier gauge than what ships with most high tunnel kits in this price range.
• 1.315‚Ä≥ 16-gauge tubing for trusses, purlins, and roll-up pipe ‚Äî provides lateral strength and supports the roll-up side mechanism along the full length of the tunnel.
• 1.75‚Ä≥ 14-gauge square end wall framing ‚Äî heavier-gauge square tubing that keeps end walls solid, plumb, and able to support the polycarbonate panels long-term.

Covering System

• Double layer of 6-mil, 4-year greenhouse plastic ‚Äî inflated between layers for better insulation, which helps maintain more consistent growing temperatures throughout the season.
• Twin-wall polycarbonate end wall covering ‚Äî 8mm polycarbonate panels on both end walls deliver superior insulation and carry an expected lifespan of 15‚Äì20 years, which means no re-covering down the road.
• Woven roll-up sides rated for 7 years of UV exposure ‚Äî woven polyethylene that resists tearing during daily operation, outlasting standard 4-year poly film. Since the roll-up material is separate from the top cover, you can install the sides on a different day ‚Äî even in windy conditions.
• Wind exclusion panels and bug netting under roll-up sides ‚Äî reduces pest entry and cold air infiltration at the side gaps, giving you airflow without the insects.
• Aluminum double wirelock hip board ‚Äî secures the plastic film at the base of the bows for a tight, lasting seal.

Doors & Ventilation

• 8‚Ä≤ √ó 7‚Ä≤ double sliding door openings (two 4‚Ä≤ √ó 7‚Ä≤ panels per end) ‚Äî sliding doors need no clearance arc, stay fully open in wind, and provide wide access for wheelbarrows, carts, and equipment from both ends of the tunnel.
• End wall peak vents with automatic opener ‚Äî temperature-activated vents that open on warm days and close when it cools down, with no electricity or manual adjustment required.
• 5:1 gear crank roll-up side operators ‚Äî the 5:1 gear ratio keeps sidewall operation smooth on both sides, so you can open and close ventilation with minimal effort.

Baseboards & Trellis

• Steel and polycarbonate baseboard system ‚Äî no lumber to source locally, and no wooden boards sitting in moisture waiting to be replaced down the line.
• Trellis cables and support bracing ‚Äî ready for tomatoes, cucumbers, or any crop that climbs.

Hardware

• Grade 5 bolts and stainless steel self-tapping tek screws ‚Äî corrosion-resistant hardware throughout the entire structure.
• Aluminum fabric clips for roll-up sides

Compare the CT Greenhouse High Tunnel Tiers

All three models share the same commercial-grade galvanized steel frame and meet NRCS Practice 325 requirements. The difference is in the features that ship with each tier.

What Makes the Pro Different

Twin-wall polycarbonate end walls with a 15–20 year expected lifespan

Poly film end walls typically last 4–6 years before UV degradation makes them brittle and cloudy. The Pro's 8mm twin-wall polycarbonate panels carry an expected lifespan of 15–20 years and insulate better than single-layer film. The trapped air channel in the twin-wall construction acts as a natural insulator — keeping heat in during cold nights and reducing temperature swings inside the tunnel. Most high tunnel kits in this category ship with poly film end walls or list polycarbonate as a separate upgrade.

8′ × 7′ double sliding door openings on both ends

Sliding doors need no clearance arc, which means they open fully regardless of wind conditions and give you consistent access from both ends. You can drive a wheelbarrow, garden cart, or small equipment attachment straight through without angling or waiting for a gust to pass. Each end has two 4′ × 7′ panels that slide open to create a full 8-foot-wide opening. Many high tunnel designs either omit doors entirely or offer them as a separate accessory.

Woven roll-up sides rated for 7 years of UV exposure

Standard greenhouse poly film on roll-up sides is rated for about 4 years of UV exposure and tends to tear along crease lines from daily rolling. The Pro's woven polyethylene roll-up sides are built from a heavier, woven material that resists tearing during operation and holds up to contact with irrigation equipment, trellising hardware, and tools. Because the roll-up material is separate from the top cover, you can install the sides on a different day — even in windy conditions. Since roll-ups typically account for roughly half of covering labor, that flexibility means you need a shorter clear-weather window on covering day.

Steel and polycarbonate baseboards — no lumber to source or replace

Standard high tunnel designs call for wooden baseboards — typically 2×10 lumber that you source locally. That lumber sits on the ground, stays in contact with moisture, and eventually needs replacement. The Pro's galvanized steel and polycarbonate baseboard system removes that cycle entirely. No lumber to buy, no lumber to replace. Like the rest of the frame, it's built with American-made tubing designed for corrosion resistance and long-term use.

Trellis cables and support bracing for vine crop production

If you're growing tomatoes, cucumbers, peppers, or any vine crop, a trellis system is essential. Most kits in this category require you to purchase trellis cables and hardware separately. The Pro ships with trellis cables and support bracing built into the frame design — ready for vine crop production from the first season.

Everything you need, in one kit: The Pro covers every structural component and covering system needed for a complete build, including steel and polycarbonate baseboards. No lumber to source separately. Our team can help you finalize your configuration during your quote call.

Commonly Added Accessories

Most Pro buyers add one or more of these to their order:

Shade Cloth Circulation Fans Ground Cover / Landscape Fabric Ridge Vent Kits Automatic Roll Up Sides

Call 860-341-8707 and we can add accessories to your quote.

Frequently Asked Questions

What type of door does the Pro come with?

The Pro has an 8′ × 7′ double sliding door opening on each end, made up of two 4′ × 7′ panels. Sliding doors need no clearance arc, so they open fully regardless of wind and give you a straight shot for carts, wheelbarrows, and equipment. Both ends are configured the same way.

Are polycarbonate end walls worth it on a high tunnel?

For most growers, yes — and the numbers back it up. Twin-wall polycarbonate outperforms poly film in three measurable ways: it retains heat better (the trapped air channel acts as a natural insulator), it carries an expected lifespan of 15–20 years compared to 4–6 years for poly film, and it eliminates the labor and cost of end wall re-covering. The Pro ships with 8mm twin-wall polycarbonate on both end walls.

What is a woven roll-up side, and why does it matter?

Woven roll-up sides use woven polyethylene fabric rated for 7 years of UV exposure, compared to about 4 years for standard greenhouse poly film. The woven construction resists tearing during daily rolling and stands up to contact with irrigation equipment, trellising, and tools. There's also a scheduling advantage: the roll-up material is separate from the top cover, so you can install sides on a different day — even when it's windy. Since roll-ups account for roughly half of covering labor, that flexibility shortens the clear-weather window you need.

Does the Grower Pro High Tunnel qualify for NRCS EQIP funding?

Yes. Like all three CT Greenhouse high tunnel tiers, the Grower Pro is designed to meet USDA NRCS Conservation Practice Standard 325 (CPS 325). CT Greenhouse is an NRCS-eligible vendor and our structures have been approved in every state where they've been submitted for review. Confirm eligibility for your project with your local NRCS office. Learn more about the NRCS high tunnel program or read our complete NRCS grant guide.

What size high tunnel do I need?

The Grower Pro is available in widths from 16 to 30 feet and any length you need (commonly 48, 72, 96, or 148 feet). For most market farmers, 30′ × 96′ is a popular starting point — it maximizes your growing area within a common NRCS reimbursement range. NRCS grants reimburse on a cost-per-square-foot basis, so a larger footprint can mean a higher total reimbursement. Contact us for a quote based on your crop plan and site.

Compare Our High Tunnel Models

Grower Series Plus Series All High Tunnel Models NRCS High Tunnel Funding Guide