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March 19, 2013
Creeping phlox is a widely grown perennial groundcover mostly recognized by the beautiful masses of color it produces in the early spring. It’s hard to beat the stunning display of color as the evergreen carpet wakes up after a long winters rest....
March 19, 2013
Like many ornamental plants, perennials are susceptible to numerous types of plant viruses. Growers often jump to conclusions when they hear the word “virus” and don’t consider that plant viruses are often not as destructive or common as diseases...
March 19, 2013
In floriculture, we have long been familiar with Florel sprays, whether for height control on hyacinths or daffodils, to abort flowers and promote of branching in many crops (such as geraniums and fall mums), or to induce flowering in bromeliads....
March 19, 2013
Each year the North American Poinsettia Trials evaluates hundreds of poinsettia cultivars, many of which are new to the market. However, as any poinsettia grower will tell you, selecting the right cultivar is only the beginning. Many decisions have...
February 05, 2013
A plug or liner dip is a plant growth retardant (PGR) application technique in which a tray of finished young plants is placed into a shallow PGR solution for a short period of time.  This allows the growing media to absorb the PGR from the...
February 05, 2013
Westflowers by the German breeder Westhoff is shaking up the vegetative petunia category with its Crazytunias ­— a collection of unique petunias with exciting flower colors and patterns that are grower and consumer friendly. ‘Crazytunia Black Mamba...
February 05, 2013
Westflowers by the German breeder Westhoff is shaking up the vegetative petunia category with its Crazytunias ­— a collection of unique petunias with exciting flower colors and patterns that are grower and consumer friendly. ‘Crazytunia Black Mamba...
February 05, 2013
One of the most recognized and reliable perennials in shade gardens is the old-fashioned Bleeding Heart. When grown under partial shade in well-drained soils with ample moisture, it is hard to beat the flower power and dependability of Dicentra...
February 05, 2013
In September 2009, I visited the Florexpo facility in Paraíso, Costa Rica, and learned all about the 130 million cuttings they produce each year, sanitation protocols, their sustainable practices and so much more. In the December 2009 issue of GPN,...
February 05, 2013
Calla lilies (Zantedeschia) have become a popular greenhouse floricultural crop in the United States, and interest continues to increase for both pot and cut flower production.Callas have long-lasting, elegant flowers and have been a favorite in...
February 05, 2013
You would like your plant’s root system to be in balance with the soil, your growing media. Balance in water, balance in food, balance in microbes and balance in organic/inorganic matter all group together to maintain the health of the roots....
February 05, 2013
The North American Poinsettia Trials reached a significant milestone this year — it has been evaluating poinsettias, in cooperation with the poinsettia breeder companies, for 20 years since it was started in 1993. The first trials include Allan...
January 10, 2013
January through March can be considered young plant season — a period in which seeds of many garden plants are sown and grown in plugs. Ornamental cuttings are also harvested, stuck and rooted as liners. During this time, the days are short and...
January 10, 2013
Garden mums are a strong part of our culture during the fall season. For generations across North America people have been using garden mums to beautify their homes and businesses. Fides began as a chrysanthemum breeding company more than 45 years...
January 10, 2013
There are numerous perennials that have great attributes and landscape performance but are not easily marketed alongside many of the mainstream perennials in the marketplace today. The Perennial Plant Association’s 2013 Perennial Plant of the Year,...
January 10, 2013
When it comes to lighting, the future is upon us. High-powered LED products, once the exclusive province of cutting-edge research, are invigorating today’s commercial greenhouse market. Your new choices, ranging from shelf lights and growth bulbs to...
January 10, 2013
Imagine cloning your most experienced, efficient  employees to get hundreds, or even thousands, of additional workers in your greenhouses who toil to improve the quality of your poinsettia (and other) crops and who never show up on your payroll...
December 07, 2012
In the past several years, growers have tightly sealed their greenhouses to reduce heat losses and save on fuel costs, but the consequence can be slower plant growth. If crops develop roots slowly, if shoot growth is retarded, or if plants don’t use...
December 06, 2012
Calliope is an “interspecific hybrid” series, developed by crossing normal zonal (upright) geraniums with ivy geraniums. Well-grown Calliope baskets and containers have excellent sell-through at retail because of their controlled mounding habit,...
December 06, 2012
Many growers seek spring flowering perennials with attractive foliage characteristics. Erysimum ‘Fragrant Star’ is an exciting stable variegated spring blooming wallflower, destined to earn a place in many perennial programs. ‘Fragrant Star’ is easy...
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