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October 05, 2005
To feed, or not to feed — that is the question greenhouse producers contemplate for every crop. Am I using enough fertilizer? Can I use more without jeopardizing the crop? What are the ramifications of too much fertilizer? In order to address these...
October 05, 2005
New Guinea impatiens breeding for greenhouse and landscape performance has tremendously improved over the past two decades. At the Penn State Trials this past summer there were more than 100 great-performing cultivars in both the shade and full sun...
September 06, 2005
If it has been a while since you traversed the Rockies and made it to the Farwest Show in Portland, Ore., you’re missing out (look for full show coverage next month). Not only is it one of the best-attended industry shows in the nation, but it’s...
August 03, 2005
Official label approval has been given to a number of innovative methods of applying plant growth regulators (PGRs). The Bonzi label (paclobutrazol, Syngenta Professional Products) includes a number of “chemigation” methods, including injection...
August 03, 2005
Vegetatively propagated floriculture crops continue to increase in popularity because of tremendous production, marketing and garden success. Growers are able to propagate a wide variety of herbaceous plants on-site through the help of improved...
July 12, 2005
Applying PGRs as a drench early in the production of poinsettias provides better control, is often easier than sprays and has less effect on bract development. More important, is that early drenches can be applied safely after the spray cutoff dates...
July 12, 2005
The “liner dip” is a new and effective method for applying plant growth regulators (PGRs). It is an efficient way to treat large numbers of plants with minimal labor and chemical. Liner dips can be particularly beneficial for very vigorous crops...
June 09, 2005
With so many new plant introductions every year it starts to get a little difficult to get excited about another shade of red geranium, an impatiens that is a quarter of an inch shorter or another day length “neutral” petunia. So for many of us the...
June 09, 2005
Over the past nine years we have seen a 300-percent increase in the number of cuttings imported into the United States. In 2003, greenhouse growers in the United States imported more than 724 million unrooted cuttings (URCs) of annuals and...
June 09, 2005
Echinacea purpurea ‘Little Giant’ is a dwarf coneflower with many desirable attributes suitable for both container production and landscape uses. Its distinguishing characteristics include a compact growth habit, reaching only 12-16 inches tall;...
June 09, 2005
Canna ‘Tropicanna Gold’ is the newest member of the Tropicanna family of cannas from Anthony Tesselaar International. It is a sport of the original Tropicanna (var. ‘Phasion’). Description ‘Tropicanna Gold’ is distinguished by the alternatively...
May 17, 2005
The potential for unauthorized use of pesticides has prompted new concerns about storage and security. Now may be a good time to review your storage practices to see if they meet current guidelines. Proper storage can prevent accidents that could...
May 17, 2005
Life is good in the coneflower world. Echinaceas are topping the perennial charts — ‘Rocky Top Hybrids’ are among the many new selections. Exciting new patented clonal selections are being introduced yearly, but the seed option (easy to produce...
April 25, 2005
Producing compact bedding plants often involves a chemical means of height control. Sumagic (uniconazole, Valent USA Corp.) is a plant growth-regulating chemical that reduces stem elongation and is used to control height of ornamental plants. In...
April 20, 2005
Reducing plant handling costs is a goal of most greenhouse businesses. Carrying plants is time consuming and heavy work. It is also expensive. There are many systems that can be used to reduce this task and its cost. Purchase decisions should be...
March 24, 2005
Management of soil-borne diseases is critical in greenhouse and nursery production. Soil-borne diseases are caused by the pathogens Pythium and Rhizoctonia (damping off), Thielaviopsis (black root rot) and several other root rot and wilt organisms...
March 04, 2005
With spring season nearly upon us (or in full swing for those growers far south and west), everyone is getting extremely busy taking care of all those crops in the greenhouse. Days are full of transplanting, watering, moving crops, spraying and...
January 25, 2005
You could receive a perfectly healthy liner or plug, but without correct fertilization crop quality (and profit) will quickly go downhill. Because the wide range of plant species we grow differ in nutritional needs it is often difficult to grow...
January 25, 2005
Most materials that growers receive are handled on pallets. Bags of growing mix, bundles of containers, fertilizer and construction materials require less handling labor when pallets are used. Fortunately, there are many pieces of equipment that...
January 25, 2005
Elephant ear or taro (colocasia) has been increasing in popularity because of both the wider range of color choices and improved cold hardiness. The species, Colocasia esculenta, produces 5- to 7-foot-tall plants that have very large (3 feet),...
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