Something for every garden

New and improved breeding shown at CAST 2026

Heuchera+Heucherette+Pink+pot.jpg — Heuchera Heucherette™ Pink

double+hot+pink.jpg — Echinacea SunMagic® Double Hot Pink

Breeders & Suppliers

Bull Gartenbau has been an integral part of northern Germany since 2009. In Schleswig Holstein, in Gönnebek, Hartwig Bull turned his passion into a breeding profession. Together with his wife Ulrike Bull and a strong team, the horticultural manages approx. 11 hectares, 25,000 m2 of which are under glass. The “Bull Plant Genetics” plants are not only known in Germany, but also are well known in North America for new breeding in Rudbeckia, Echinacea, and Helianthus.
Danziger is engaged in the research, breeding, development, propagation, production, sale and marketing of varieties of cut flowers, annuals and perennials – creating extraordinary flower varieties and beautiful assortments that help customers along the entire value chain achieve extraordinary success.
Heuger is a family-owned company dedicated to breeding and production of Helleborus ssp. and hydrangeas. Located in northwest Germany, Heuger is cultivating high-quality young plants, pre-finished and flowering plants for international plant production, and retailers at three locations on 75 acres of outside fields and 70,000 square meters of greenhouse space. Heuger has introduced many new cultivars that set industry trends including the Helleborus Gold Collection® and the Helleborus Ice N’ Roses® series.
Kapiteyn is a world leader in Calla bulb breeding and production. They are the breeders of the Captain Calla line. Their breeding work has developed unique varieties with heavier blooming and a longer shelf life. For the North American market, Kapiteyn brings very high-quality product and hands-on grower support and expertise.
The Best in Seed Perennials
PanAmerican Seed offers a full line-up of unique, high-quality perennial genetics that growers count on for reliability and easy programming. The assortment includes a broad spectrum of colour and interest with bloom seasons ranging from early Spring through Fall. Crops include a substantial list of first-year flowering perennials. Count on PanAmerican Seed for strong bench-to-garden performance and reliable availability.
Being part of the Europen horticultural industry for more than 100 years, Kientzler has long experience in breeding and developing innovative ornamental plants. The main Kientzler company is located in Gensingen Germany. As part of the Kientzler group, Innovaplant de Costa Rica is a reliable source for high standard unrooted cuttings for worldwide supply. Innovaplant is also involved in elite production, R&D, and laboratory services.
KiwiFlora is a plant variety management group, with a combined 30 years of product development and breeder representation, based out of New Zealand. They represent a wide variety of plant breeders and have offered a large selection of new genetic introductions into the North American market.
Plants Management Australia (PMA), based in Australia, represent a wide array of breeders, and have helped bring to the global market a wide and unique array of plants. PMA specializes in licensing, marketing, and distribution of new and exceptional genetics.
Syngenta Flowers North America is one of the largest wholesale breeders of hybrid flower seeds and cuttings in the world – developing and producing quality flower varieties for professional growers internationally. With a focus on an innovative portfolio and expert technical support, Syngenta’s products are known for excellent performance from greenhouse to garden. Distinguished by their exceptional work early-season perennials and lavenders, they offer a robust assortment of both vegetative and seed-raised perennials for all seasons through ThinkPlants®.
Royal Van Zanten is an international leader in breeding and propagation of cut flowers, pot plants, and other unique genetics that work well for many North American grower programs. Royal Van Zanten has over 1200 employees that work from our home base in the Netherlands and in our international breeding and production locations in Uganda, South Africa, and Colombia.
During the past 27 years, Terra Nova Nurseries has grown from a small lab and greenhouse to a world leader in perennial and annual plant breeding. The company’s breeding team has enriched the horticulture market with more than 1,000 varieties and 30+ national and international award-winning introductions.
Unex Inc. works with top quality producers of perennial bare root in products like Astilbe, Hosta, Peony, GAV lilies, and Hemerocallis. They have a very hands-on approach with Dutch growers plus skilled expertise in storage, packing, and shipping of bare root product for supplying high-quality product to the North American market.

Rooting Stations

At Aldershot Greenhouses, we supply cuttings, liners, prefinished and finished products, servicing both growers and retailers. Our finished offerings include year-round pot roses, seasonal hydrangea, hellebore, clematis, mums, gerbera and poinsettias. Product is harvested, packed and shipped in a timely manner, providing you with the freshest product.
Creekside is a 3rd generation potted plant grower in Ontario, Canada. With 400,000 square feet of greenhouses and almost 25 acres of outdoor hydrangea production, Creekside specializes in the production of high-quality pre-finished Hydrangea liners, which leave the nursery primed for a quick and high-end finish with the finish grower. You can find the new Bloom Champion Hydrangea genetics available exclusively from Creekside Greenhouses.
DeVry Greenhouses, which is run by third-generation family growers, is known for its exceptional expertise in growing. DeVry Greenhouses has over 90 acres of greenhouse production and operates out of nine different locations. They specialize in high-quality annuals, perennials, vegetables, herbs, and indoor foliage.
Now in the second generation of family ownership, the Green Circle Growers facilities and services have been growing since 1968. Located in Oberlin, OH, Green Circle Growers is a dedicated plug and liner supplier for much of North America.
Since 1979, Headstart Nursery has been a West Coast leader in vegetable transplants and ornamental plant liners. They are based in Gilroy, California and have multiple growing locations throughout California to deliver the highest quality plants possible to the West Coast market.
Gulley Greenhouses, based in Fort Collins, CO is a 45-acre young plant and finished plant facility with both heated greenhouses and cold frame growing conditions, and specializes in the production of perennials, roses, and herbs. Using the great Colorado location, they have also developed a high quality perennial pre-vernalized liner program for North American growers.
James Greenhouses is a family run company dedicated to producing the highest quality perennial plugs and liners for the North American market. Their location in Colbert, GA, where the winters are mild and there are high light levels, gives James Greenhouses the ability to have year-round high-quality liner production.
An established second-generation family-run business, Knox Horticulture produced a wide range of finished product for landscapers and theme parks. They also use extensive automation in their young plant production, resulting in a high quality and faster finish product for the nursery grower.
Linwell Gardens is a 3rd generation family-run business, with over 16 acres of growing space. Founded in 1989, Linwell is one of Canada’s largest propagators of vegetative liners. Linwell Gardens is known for their dedication to the highest quality in liner production and has specialized in the propagation of rooted annuals, chrysanthemums, and poinsettia liners.
Monrovia Nursery has been a pioneer and craftsmen in the art of growing plants for nearly 100 years, since their founding in Southern California by Harry E. Rosedale, Sr. in 1926. Monrovia has separate nurseries in various regions to deliver plants throughout the country. Monrovia themselves grow more than 4,000 varieties for every landscape need and every region. Monrovia is also well known for many new and unique plant introductions, and a brand that means quality to growers, landscapers, and consumers.
During the past 27 years, Terra Nova Nurseries has grown from a small lab and greenhouse to a world leader in perennial and annual plant breeding. The company’s breeding team has enriched the horticulture market with more than 1,000 varieties and 30+ national and international award-winning introductions.