Todays Technology

Tomorrow's Plants

Today’s Technology … Tomorrow’s Plants

Rancho Tissue Technologies is known worldwide for our vigorous, disease-free crops. At Rancho Tissue Technologies we expertly blend technology and true innovation to produce the finest tissue-cultured, custom-propagated plants, food crops, and medicinal plants in the world.

As one of the largest producers of tissue culture in the world and the largest succulent tissue culture producer in the U.S.A., we grow up to 4 million plants per year in our state-of-the-art, environmentally controlled laboratory and greenhouses. Led by Heather Hunter May and directed by Susana Vanzie-Canton, our team of expert international researchers and scientists has been producing an exceptional range of plants for over 32 years.

Founded in 1987

Heather Hunter May founded Rancho Tissue Technologies in 1987 with a goal of supplying the industry with exceptional quality plant tissue, including hard-to-find varieties. One of the few female tissue culture lab owners in the world, Heather has a background in molecular biology, bio-chemistry and biology as well as practical experience running her family’s nurseries. Owning and managing the third generation of a family business which at one time included 7 nurseries and numerous orchards, she knows well the quality standards required for cuttings and stock plants, and meets or surpasses these standards with every plant produced at RTT. Heather draws on her years of experience and expertise to oversee every operation of the laboratory and greenhouses, from production planning to quality control to introducing new varieties.The state-of-the-art, environmentally controlled lab now produces more than 4 million plants per year for customers worldwide.

Susana Vanzie-Canton joined RTT in 2007 as a researcher. With a Master of Science in Tropical Plant and Soil Science and extensive work in the field, she brings both education and experience to our team. She is valued for her extensive background in tissue culture, including developing plant tissue culture protocols and mutation induction protocols for several plant species. She directs day-to-day activities at the company and ensures the continued growth of our line of tissue cultured products including succulents, foliage plants, cut flowers, perennials, tropical plants, ornamental grasses and virus-indexed plants.

Our plants are available direct from us or through our worldwide broker network. Please feel free to call us at (858) 756-6785 8:00am-4:30pm M-F or use the contact form below if you have any questions, comments or suggestions.

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The Rancho Tissue Timeline


Rancho Tissue Founded

Heather Hunter May founded Rancho Tissue Technologies with a goal of supplying the industry exceptional quality plant tissue of hard-to-find varieties.


State of the Art Lab

State of the art, environmentally controlled lab.


Susana Vanzie-Canton

Susana Vanzie-Canton joins RTT as a researcher valued for her extensive experience in tissue culture & mutation induction protocols.


4 Million Plants

RTT Celebrates it's 30th anniversary and produces over 4 million plants.

Over 400 Varieties






Fruits Nuts & Grasses