Young Plants Availability Our Brokers Resources Plugs from Seed Knox Horticulture produces a wide variety of Plugs from Seed, taking advantage of our climate-controlled germination rooms and the high light and ideal temperatures Central Florida provides. Liners from Unrooted Cuttings Knox Horticulture produces an extensive variety of Liners from Unrooted Cuttings, including a wide range of bedding plants and Geraniums, Garden Mums, and Poinsettias. Combos Knox Horticulture makes it easy for you to produce great combo baskets and planters every time. Grasses & Perennials Knox Horticulture provides a wide selection of Grasses and Perennials. Liners from Tissue Cultures Knox Horticulture now provides several varieties of Liners from Tissue Cultures, including Gerbera Garvinea and specific varieties of Cordyline and Ferns. Ferns Knox Horticulture uses tissue culture material from Vitro Plus, the world's Fern leader, to produce over 2 million fern liners per year. Ferns & Cordyline Knox Horticulture uses tissue culture material from Vitro Plus, the world's Fern leader, to produce over 2 million fern liners per year. Gerberas Knox Horticulture was one of the first to offer Gerbera plugs to commercial growers. Our Gerbera program began over 25 years ago. Today, Knox Horticulture ships Gerbera plugs to growers throughout the country. Geraniums Knox Horticulture has an extensive line of Geranium varieties. Garden Mums Knox Horticulture produces a range of Garden Mums from Gediflora, Dümmen Orange and Syngenta. Poinsettias Knox Horticulture offers rooted cuttings of all cultivars from all Poinsettia breeders for both Stock Plant production as well as Summer Plant production.