Trillium Greenhouse Kit

Small footprint. Big growing potential.

The Trillium is our most compact freestanding greenhouse—perfect for productive growing in tight backyards, patios, or urban gardens. Its tall interior and vertical design provide ample space for plants, airflow, and light, all while keeping the footprint small.

Included With Your Trillium Greenhouse Kit

Durable, High-Quality Construction

• 18″ redwood basewall with Brazilian cedar trim and built-in screened vents

  Combines strength, beauty, and natural airflow

• 6mm twin-wall polycarbonate roof

  Superior insulation and energy efficiency for year-round growing

• 1/8″ annealed glass walls

  Exceptional clarity and maximum light transmission

• Engineered for 35 PSF snow load and 75 MPH wind speeds

  Optional All-Weather Kits available for harsher climates

Ventilation & Climate Control

• Solar-powered roof vent(s) with integrated screens

  Hands-free, automated ventilation

• Screened jalousie window and basewall vents

  Adjustable airflow and pest protection

• Fully screened ventilation system — roof and sides

  Promotes healthy air circulation while keeping pests out

• Interior gutters with drainage tubing

  Manages condensation and protects the structure

Convenient, Customizable Entry

• Full-Lite hinged door (24″ wide × 6′-6″ tall) with tempered glass

  Blends durability with maximum light entry

Easy, Efficient Installation

• Preassembled gable ends, roof, and side walls

  Faster, easier assembly

• Printed and digital installation manuals

  Clear, step-by-step guidance

Customize Your Trillium Greenhouse

Basewall Options
Choose our matching 18″ redwood basewall kit or build your own custom masonry base for added style and insulation. [Learn more →]

Thermal Option
Upgrade to our exclusive double-glazing system for improved warmth, diffused light, and energy savings in cooler climates. [Learn more →]

Plant Benches
Handcrafted redwood benches designed to maximize growing space and enhance greenhouse organization. [Learn more →]

Garden Kit
A complete set of tools to control airflow, temperature, and humidity for healthier plant growth. [Learn more →]

All-Weather Kit
Added reinforcement for snow and wind-prone regions—engineered for higher loads without altering the Trillium’s clean design. [Learn more →]

Purchase

Ready to purchase The Trillium? The prices shown online include credit card and processing fees, but when you order directly through us, you’ll pay less.

Give us a call at (503) 244-4100 and one of our friendly sales experts will prepare an emailed estimate. We’ll help you customize the perfect size and features to match your gardening needs—and ensure you receive the lowest cost available on your new greenhouse.

Shipping & Delivery Information

Each Trillium greenhouse is carefully packaged and ships directly from our Portland workshop. Delivery is available throughout the contiguous U.S. and Canada with detailed instructions for safe, straightforward installation.