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Straight walls, more growing room
Grow Master 300
Straight-wall arch
Best for Shelving and tall crops along the walls
A 3 m wide greenhouse with vertical side walls and an arched roof, so shelving and tall crops fit right up to the edges.
Your selected size
- Footprint
- 3 × 4 m
- Floor area
- 12 m²
- Panel thickness
- 4 mm
Ask for a delivery estimate for your location
SKU G300-3x4-4
- Curbside freight delivery to the contiguous US.
- Real people answer sizing and delivery questions.
Made for your garden
Meet the Grow Master 300
Growers who want to use the full floor area — staging along the walls, tall tomatoes and cucumbers in the side beds.
Built-in benefits
Vertical side walls
Full head height and usable space all the way to the edges.
Bolted steel connectors
Galvanized brackets join every profile — no welding required.
Roof vent
Opening vent in the roof for warm-weather airflow.
Specifications
- Frame material
- Galvanized steel
- Covering
- Twin-wall polycarbonate
What’s included
- Frame, polycarbonate panels, doors and fixings
- Assembly instructions
Need help choosing a size?
Tell us about your garden and what you want to grow.
Compare with
- Most affordable
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