GainYards PolyGrow™ Walk-In Polytunnel Greenhouse — UV-Resistant PE Cover

Extend Your Growing Season — Protect Every Plant, All Year Long

Frost hits early. Wind snaps stems. Pests don't take days off. The GainYards PolyGrow™ Polytunnel gives your garden a controlled environment — walk-in height, roll-up sidewalls for airflow management, and a UV-stabilized PE cover that holds up through full growing seasons. Set it up once and grow earlier in spring, later into fall, and stronger through summer.

Each tunnel covers a full 3m × 2m footprint (64 sq ft / 6 m²) of growing space. Bundle multiple units to cover raised beds, seedling nurseries, or your entire market garden plot.

💳 Flexible Payments Available — Split your purchase into 4 interest-free installments with Shop Pay. No hidden fees, no surprises.

Bundle Options

2-Tunnel Bundle — Start with two side-by-side tunnels for a dedicated grow zone. Covers two full raised beds or a focused seedling nursery. Best for backyard growers and homesteaders expanding their operation.
Total coverage: 129 sq ft (12 m²)

3-Tunnel Bundle — Add a third tunnel for variety — keep one dedicated to starts, one to warm-season crops, one for cool-season greens. The most versatile setup for a serious home grower.
Total coverage: 194 sq ft (18 m²)

4-Tunnel Bundle — A full market garden section. Run four tunnels as a continuous protected row or stage them for staggered harvests. Lower cost per tunnel than the 2-pack.
Total coverage: 258 sq ft (24 m²)

5-Tunnel Bundle — Maximum coverage for serious producers. Protect an entire planting operation — vegetables, herbs, starts, and fruit — in one order.
Total coverage: 323 sq ft (30 m²)

Bundle Coverage & Cost Breakdown

How Much Space Do You Need?

A single 3m × 2m tunnel fits 2–3 standard raised beds or 20–40 plants depending on crop type and spacing. Running tunnels end-to-end doubles your covered row length without gaps.

Number of Beds × Bed Size (sq ft) = Coverage Needed → Choose Your Bundle

💡 Tip: Size up one bundle — the extra tunnel gives you a dedicated propagation or hardening-off space that pays for itself in transplant success rate.

• UV-resistant PE cover — holds up through full sun growing seasons without yellowing or cracking
• Roll-up sidewalls — dial in ventilation on warm days, seal up tight for overnight frost protection
• Walk-in 2m height — full standing access, no crouching to tend plants or harvest
• Powder-coated steel frame — rust-resistant, holds shape under wind and snow load
• 3m × 2m footprint per unit — fits standard raised bed layouts and row spacing
• Zippered door panel — keep pests and birds out while maintaining easy daily access

Complete Your Growing Setup

Pair your polytunnel with GainYards weed barrier fabric underneath your beds — suppresses ground weeds before they compete with your crops, keeps soil moisture in, and eliminates the need for herbicides inside your protected growing zone.

Add Weed Barrier →

Backed by our satisfaction guarantee. If it doesn't perform in your garden, we'll make it right.