World Class Greenhouse Structures & Systems

Welcome to Prospiant, where Rough Brothers, Nexus Greenhouse Systems, and ThermoEnergy Solutions combine forces under one name to bring you world-class greenhouse structures and systems

Value-Engineered Design, Project-Centric Approach

We provide a comprehensive suite of design, architecture, site development, and project budgeting consultation services.

Local Manufacturing for Supply Chain Reliability

As one of the largest North American manufacturers of commercial greenhouses and indoor grow facilities, we have multiple manufacturing facilities across the U.S. and Canada.

Streamlined End-to-End Flow with Automated Systems 

We design, build, and recommend automated greenhouse systems optimized to work together harmoniously, for the highest level of control and efficiency.

Tailored Solutions for Greenhouse Renovation and Repair

We deliver top-quality designs, installations, and products for maintaining, repairing, and upgrading your greenhouse facility.

What We Do

Three Legacy Companies, One Powerhouse:
United for Your Growing Success

With the capabilities and expertise of three industry-leading greenhouse companies powering the Prospiant brand, we’re the largest North American provider of large-scale commercial greenhouses, cultivation structures, and growing equipment.

It’s time to rely on a turn-key provider you can count on every step of the way. We’re the only commercial greenhouse resource you need to succeed.

Manufacturing, Design, Engineering, Building — we have the whole package!

Our Capabilities

Featured Projects

Pleasant View Gardens

When Pleasant View Gardens wanted to improve the shipping capacity at its Pembroke, NH location, it turned to Prospiant for help with the 150,000-square-foot expansion, which serves as both a shipping area and a greenhouse for more than 30,000 hanging baskets.


Horticultural Greenhouse


New Hampshire


View Project

About Prospiant

The roots of experience run deep at Prospiant with a proven track record stretching more than 150 years for delivering exceptional results. 

With Nexus Greenhouse Systems, Rough Brothers, and ThermoEnergy Solutions combining strengths as Prospiant, we offer you end-to-end products and services from true greenhouse and indoor grow professionals.

Our Company

Ready to Grow Your Business?

Talk to Our In-House Experts

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