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WHY SIGMA
- Galvanized pipe frame are engineered to be durable and functional
- Comes with 2 doors and vents for easy access and ventilation
- 6mm Twin-Wall Polycarbonate Panels with 100% UV protection
- Wind Resistant up to 65 mph
- Snow load of 32 PSF
- Arched shape - so the wind, snow, and hail just slide off the sides
- Extendable beyond to 100 ft.
- Can be installed with or without a base
- Aerodynamic arched greenhouse design helps wind, snow, and hail slide off naturally.
- Maintenance-free
- 5 years warranty
NEW UPGRADE
- Energy-efficient insulated doors help reduce heat loss and maintain stable year-round growing temperatures.
- New 8ft Wide high-performance mid-size greenhouse designed for refined spaces.
- Reinforced door hardware ensures smooth daily access with long-term durability in a heavy-duty greenhouse structure.
- Aluminum locking trim system secures polycarbonate panels firmly along the arch frame for superior weather resistance.
- Integrated latch mechanism allows synchronized door and window opening to optimize greenhouse ventilation.
Bundle A
- (1) Sigma Medium Greenhouse
- (1) Automatic Window
- (1) Manual Window
- (1) Palma Heater/Fan+Digital Thermostate
Bundle B
- (1) Sigma Medium Greenhouse
- (1) Automatic Window
- (1) Manual Window
- (1) 12ft Wide Polyester Wove Shade
- (1) Bio-Green Digital Thermostat
Bundle C
- (1) Sigma Medium Greenhouse
- (1) Automatic Window
- (1) Manual Window
- (2) Milkhouse Portable Heater 5120 BTU
SUPPORT
- Manual
- 5 Years Warranty Document
- Manual
- Foundation Setup Guide
- Window Installation Guide
- Find an Installer
- Download Built® App Android
- Download Built® App iOS
Contact us if you have measurement questions when placing the order
FAQs
OVER 32 FT QUOTE
The Sigma greenhouse is modular and can be extended in 6 ft increments up to a total length of 100 ft.
Nearby Terminal
Customers who pick up their Planta greenhouse from a local terminal shown on the map may benefit from:
1. Avoid additional delivery wait times
2. Reduce the risk of loss or damage during final delivery
3. Freight can typically fit in a pickup truck, trailer, U-Haul, or cargo van
P.S. Due to the schedule of carrier, Our team will confirm terminal availability with you before your order ships.
We Beat Major Retailers and Online Stores — While Delivering Better Service
From big-box brands to niche greenhouse shops, we’ll match or beat their prices
and deliver faster service with personalized project support
Beat Their PriceACCESSORIES
Window
- Sigma Manual Roof Vents
- Sigma Automatic Roof Vents
- Automatic Window Opener
Shelving & Storage
- Shelf
- Palram Steel Work Bench
- Rion Two Tier Work Bench
- Extension Kit
Climate Control
- Shade Cloth
- Palma Heater
- Phoenix Heater
- Exhaust Fan
- Intake Fan
Gardening Essencials
- Garden Bed
- Composter
- Solar Light
LEARNING
REVIEWS
Store Reviews
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