Commercial Greenhouse 420 SeriesTM

Greenhouse Cannabis Solutions

Greenhouse Cannabis Solutions

Harnois’ 420 Series greenhouses are expertly designed for cannabis cultivation, ensuring optimal growing conditions for high-quality cannabis production. Whether you’re looking for a cannabis greenhouse, a weed greenhouse, or a greenhouse for weed, our Luminosa 420 and Ovaltech 420 models offer unmatched durability, light efficiency, and climate control. Tailored for both warm and Nordic climates, our greenhouses support year-round cannabis growth, maximizing yield and energy efficiency. Choose Harnois for your cannabis greenhouse needs and benefit from innovative designs and robust structures.

commercial greenhouse canabis

Luminosa 420TM

Gutter connected canabis greenhouse

Designed to offer the best canabis growing conditions, this high tech greenhouse combines smart engineering and agronomic excellence. 

Available in two models : 

  • Warm/snowless climates
  • Nordic/temperate climates.

Available models

The Luminosa 420TM greenhouse is ideally suited for growing cannabis. It is also available in many widths to meet the needs of producers.

Available only in Canada and USA

Ovaltech 420TM

Ground-to-ground canabis greenhouse

The popularity of the OvaltechTM is a testament to its versatility and durability. It has become the leader for wind and snow resistance. Its efficient design allows for abundant light, resulting in uniform crop growth across the greenhouse. Engineered to enhance natural ventilation, it creates a favorable environment for healthy crops and energy efficiency.

Available models

The OvaltechTM greenhouse is a cost effective option for growing a variety of crops including cannabis. Like the LuminosaTM greenhouse, it is available in different widths.

AR 420TM

Indoor warehouse

The AR series is a custom engineering solution designed to address very specific industrial, commercial and agricultural requirements. Our engineers design custom structures for every project. These permanent buildings combine the innovative MegaDome® design and all of the benefits of conventional buildings.

Available models

The AR 420TM building can easily adapt to the specific needs of cannabis producers (width, clear height, etc.).


We offer products of different levels of technology in order to adapt to client needs and budgets.

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Our equipment makes it possible to adapt greenhouses to the types of crops being produced.

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Business sectors

Our greenhouses meet the needs of these business sectors : vegetables, fruits and ornamental, along with institutional and commercial. Discover how they’re used in your business sector.

Vegetables, fruits and ornamental greenhouses

Greenhouses adapted to fruit and vegetable crops, flowering plants, perennials, annuals and tree nurseries.

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Institutional greenhouses

Greenhouses designed to meet the specific needs of educational and research projects.

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Commercial greenhouses

Greenhouses perfectly adapted to the retail industry by enhancing the consumer experience and producer profitability.

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