Stefan and Katy Hiatt, owners of Plantivity, have a diverse and unique combined experience in the green industry. Stefan has significant experience in the green industry, in which he has developed many longstanding relationships with growers, landscape contractors and re-wholesale nurseries. Katy is a licensed Landscape Architect in the state of Colorado and has over a decade of experience in both commercial and residential design along with many years of wholesale and retail nursery experience.

We are plant logistics masters. We find and distribute the best trees, shrubs and perennials grown in the US and Canada. We are rooted in the success of our customers and our growers. We would love to help you and your staff find the best plants for your re-wholesale nursery, garden center, landscape contracting jobs, or municipality. We also provide high quality liners to growers and can contract grow plants and trees for future jobs. We assist landscape architects in plant selection and substitutions. We are excited to be a part of your team and can help you grow your success. Let us take care of all your purchasing needs and all the logistics of getting it to you, so you can focus on what you do best. Thanks for trusting the Plantivity Team!

Our goals are to develop quality relationships with our customers, growers and carriers; provide high quality plant material at competitive prices; take care of all of the logistics for our customers and growers; and begin the process of linking the gap between the design field and the nursery and growing industries.

Our Team


While studying landscape architecture, Stefan was introduced to the horticultural side of the industry; he quickly fell in love with plant diversity. In his early 20s Stefan joined a re-wholesale nursery and immersed himself in every aspect of the nursery business. 

His experience with several Colorado nurseries allowed him to build new logistics systems, create improved sale tactics and to organize practices to reduce labor costs. 

In 2011, he started Plantivity. The business has thrived due to Stefan and Katy’s philosophy of being “rooted in your success.” Stefan oversees every aspect of the nursery brokerage by meeting with growers to understand their changing market and using technology to bring innovation and foresight to the industry. He never forgets the personal touch and is out personally tagging trees and sending photos to his customers to ensure good quality control. 

When not at work, Stefan can be found on Colorado’s bike trails and ski slopes with his family.


Katy Hiatt is the President of Plantivity and a licensed Landscape Architect in the state of Colorado. She received her Bachelor’s Degree in Landscape Architecture from the University of Florida, and has studied landscape architecture in Italy, France and Spain.

Katy’s experience is broad and diverse, she has successfully produced large scale commercial design and high-end residential design, she has designed therapeutic gardens, including infusion gardens and gardens for autistic children, she has a deep understanding of all aspects of horticulture – specifically the growing of trees and shrubs. Her goal is to enrich the lives of others by connecting people, places and nature.

Cynthia Mainhart headshot


Cynthia Mainhart is the Office Manager and Bookkeeper at Plantivity.

Cynthia is fluent in both English and Spanish. She is an experienced customer service representative and bookkeeper, and has a history of providing consistent and positive service to growers and customers. She embodies a growth-focused mindset and looks at all challenges as opportunities. She loves helping people and building interpersonal relationships along the way.

Cynthia is married with three children and two dogs, and is pursuing a BAS in Leadership and Management. In her free time, she enjoys gardening, hiking, camping, and spending time with family and friends.

Rob Hausmann


Rob Hausmann oversees Procurement, Sales, and Logistics for Plantivity. He grew up on an alfalfa farm in Western Illinois and earned a bachelor’s degree in Biology with a Chemistry minor from Blackburn College, and a Master’s degree in Horticulture from Colorado State University.

Rob has extensive experience in commercial and residential landscape install & management, landscape design/build, nursery sales, and plant propagation. As a Production Horticulturist and Greenhouse Manager for the Denver Zoo, he oversaw over 60 acres of unique landscape and diverse specialty plants. He also worked as a Horticulturist for New Belgium Brewery. His background has given him a good understanding of what species preform in the high elevations and climate of the Rocky Mountain region.

In his free time, Rob enjoys international travel, visiting his family, tending to his rare plant collection, gardening vegetables and perennials, skiing, and spending time outdoors. 


Plantivity partners with the nation’s premium growers to market and sell their plants across the country. We buy in bulk, pay on time and arrange our own freight so our growers can focus on producing high quality plants. We act as an extension of your team, we are essentially your least expensive employee. Let us be your best customer and business partner.

Our Values


We build strong, long-term relationships with our customers and our growers.


We strive to educate our customers and our growers on the best practices, market trends, innovative techniques, and successful business strategies in the green industry.


We focus on working efficiency, saving time and money for our customers and our growers.

Have Fun, Be happy!

We focus on having fun at Plantivity. Working with us will be a rewarding and fun experience.

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