Best High Tunnel for an NRCS Grant: Grower, Plus, or Pro?

Best High Tunnel for an NRCS Grant: Grower, Plus, or Pro?

Once you've confirmed you qualify for an NRCS grant, the next question is which high tunnel to build. The reassuring news is that there's no single "approved" model you're forced into. Any kit that meets Conservation Practice Standard 325 is eligible, so the real decision is matching the structure to your climate, your budget, and how long you want it to last. Here's how the CT Greenhouse Grower, Plus, and Pro tiers compare for grant use.

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1. What Makes a High Tunnel "Best" for an NRCS Grant?

It's easy to assume there's an official "NRCS model" you have to buy. There isn't, NRCS funds a conservation practice, not a brand. Once a kit clears CPS 325 it's eligible; the rest of the decision is about your site, not the paperwork.

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2. The CPS 325 Baseline Every Eligible Kit Shares

Before comparing tiers, it helps to know the floor they all have to clear. To qualify under Practice 325, a high tunnel generally needs to:

• Stand at least 6 feet tall at the center peak.
• Use a metal frame, with galvanized steel being the standard for durable kits.
• Carry a greenhouse-grade poly cover, 6-mil, UV-resistant, with at least a 4-year rated life.
• Grow crops in the natural soil (or in raised beds no taller than 12 inches), not on benches.

Every CT Greenhouse high tunnel is built to meet that standard. For the full requirement-by-requirement breakdown, see our CPS 325 checklist. Exact cover specs can vary slightly by state, so your local office confirms the final detail.

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3. Grower, Plus, or Pro: Matching the Tier to Your Site

CT Greenhouse builds three high tunnel tiers, and all three meet CPS 325. They share the same commercial-grade galvanized steel frame, so the differences are about cover, ventilation, doors, and finishing, the things that decide how a tunnel holds up and how comfortably you work in it.

Grower: the straightforward entry

The Grower Series is the straightforward entry option. It pairs the commercial steel frame with a single layer of 6-mil, 4-year greenhouse plastic and gear-crank roll-up sides for ventilation. It comes in widths from 14 to 34 feet and any length, so you can size it to your ground. If you want a clean, NRCS-eligible kit without extras, the Grower does the job.

Plus: insulation and easier access

The Grower Plus Series keeps the same frame and adds to the working package. It moves to a double layer of inflated 6-mil plastic for better insulation through the cold shoulders of the season, adds double hinged doors on each end for easier access, and includes automatic peak vents plus bug netting under the roll-up sides.

Pro: the fully upgraded build

The Grower Pro Series is the top tier, built for growers who want reduced maintenance over the life of the structure. On top of the double-layer cover, it adds twin-wall polycarbonate end walls for a longer service life than film, double sliding doors, longer-life woven roll-up sides, included steel and polycarbonate baseboards, and trellis support bracing.

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4. How to Choose the Right Tier

Three questions usually settle it:

• How hard is your weather? Heavy snow and high wind are the clearest reasons to move up a tier. More insulation and a sturdier finished package handle tough conditions with more peace of mind. All three tiers share the snow-shedding gothic arch design; our complete guide to gothic high tunnels covers how the peak handles winter.
• How long is your season? If you're growing summer crops into late fall and starting in early spring, the double-layer cover and peak vents on Plus and Pro hold temperature better than a single layer.
• How does the upfront cost fit your plan? Because NRCS reimburses a cost-share rather than paying up front, you cover the kit first. A higher tier costs more now, so weigh that against the years of use you'll get. Your cost-share is based on your state's rate and your square footage, so confirm the numbers with your local office.

A Grower on a mild-climate farm and a Pro in snow country can both be exactly the right call. Match the tier to the site, your crop plan, and your experience.

Frequently Asked Questions

What's the best high tunnel for an NRCS grant?

The best one meets Conservation Practice Standard 325 and fits your climate and budget. There's no single required model. All three CT Greenhouse tiers (Grower, Plus, and Pro) qualify, so the choice is about how much structure and insulation your site needs.

Does the model I choose affect my NRCS funding?

Generally no, as long as the kit meets CPS 325. Your cost-share is based on your state's payment rate and the square footage of the tunnel, not the brand or tier you pick. Because rates vary by state, confirm the figures with your local NRCS office.

Do all CT Greenhouse high tunnels meet CPS 325?

Yes. The Grower, Plus, and Pro high tunnels are all built to meet CPS 325, so any of them can go on an NRCS contract. Your state office will confirm the exact cover specification for your area.

Should I just buy the cheapest kit since NRCS reimburses me?

You can, and a Grower is a solid NRCS-eligible choice in milder climates. But if you farm in snow or high wind, a sturdier, better-insulated tier can be worth the higher upfront cost for the load margin, longer season, and durability. Weigh the upfront difference against the years of use.

What size high tunnel should I get for my NRCS contract?

Size it to the ground and crops you're planting, then check the limits. NRCS cost-share is generally paid per square foot up to a maximum that varies by state, and some states also cap total contract value. Your local office can tell you the caps for your area before you finalize dimensions.

The Bottom Line

There's no single best high tunnel for an NRCS grant, just the tier that clears CPS 325 and fits your ground. All three CT Greenhouse tiers qualify, so choose on weather, season length, and how long you want the structure to last. When you're ready to move, our step-by-step application guide walks you through it.