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January 25, 2005
With its robust evergreen foliage and impressive late winter to early spring blooming display helleborus has caught interest from gardeners, landscapers and perennial enthusiasts everywhere. It has gained such popularity that the members of the...
December 16, 2004
A variety of commercially prepared potting mixes are available for today’s commercial growers. Selecting the formulation that performs best for your particular situation can be a difficult task, unless you know the specific needs of the crop, your...
November 11, 2004
My wife keeps telling me I should stop playing softball. She says I’m getting old. My answer, “And?” I went to play anyway, like any good warrior would and ran into an opponent I used to play against when I was…younger. We briefly reacquainted...
November 11, 2004
In my 18 years of working with plant growth regulators (PGRs), I have never had a more active research year; we have worked with more potential PGR products this year than ever before and are also seeing a lot of interest in applying old chemistries...
October 13, 2004
While visiting a grower the other day and going over his crop of pansies, mums, and flowering kale and cabbage, the main comment I had was that the plants looked like they needed more feed for growth to cover up the pots. The grower said he was...
October 13, 2004
Whiteflies can be difficult pests to manage, especially in greenhouses where they enjoy a high-quality food supply, favorable environmental conditions and minimal protection from natural enemies. Whiteflies damage a number of crops: verbena, fuchsia...
October 13, 2004
In Part I (GPN September 2004) we discussed what happens to plant growth when we grow crops cooler. Here, we will discuss how dropping temperature affects diseases and insects. In addition, to help you decide if there is a benefit for your business...
September 13, 2004
With fuel prices escalating this fall, now is a good time to evaluate how efficiently you are using the growing space in your greenhouses. The cost of providing the right environment is the same whether you are utilizing 50 percent of the space or...
September 13, 2004
Powdery mildew is one of the most common types of diseases on ornamentals. Some common hosts include rose, gerbera daisy, salvia, pansy, hydrangea, begonia, African violet, crape myrtle, delphinium, zinnia, azalea, sunflower, ranunculus, grape ivy,...
September 13, 2004
While ‘Freedom Red’ was the most important poinsettia variety in most of the country over the past 10 years or so, heat delay was not a topic that was discussed very much. However, with ‘Prestige’ becoming such a popular variety, we are hearing...
September 13, 2004
It is estimated that approximately 80 percent of the cost of heating a greenhouse is incurred at night. Given the long nights of winter in the North, heating is clearly a major cost in plant production. In addition, the dramatic increase in fuel...
September 13, 2004
The first calibrachoas were introduced only 12 years ago, but this has already become an important spring crop. Its rapid growth has been both because calibrachoas are popular with consumers and because they have a good growth habit for baskets and...
August 10, 2004
Mimulus — not a crop you hear much about but should. The Magic series from Floranova grows approximately 10 inches high with flowers that are 1 3/4-2 inches in diameter. Magic has a very short production time under long days, with flowering 6-7...
August 10, 2004
In the past decade, the perennial industry has become a significant segment of floriculture crop production. Similar to vegetative annuals, new cultivars of perennials are released every year, many of which are propagated by cuttings. In most cases...
August 10, 2004
For over five centuries gardeners and landscapers have been utilizing campanula species to accent their gardens. With more than 300 species in the genus campanula, a number of forms and textures are available for gardeners to incorporate into today’...
August 10, 2004
Are you ready for another twist to growth regulator applications for poinsettias? Many growers become very structured and resistant to change when it comes to how to grow poinsettias. Poinsettias are such a big crop with a long crop time and many...
August 10, 2004
Cultivating plants without soil, the accepted definition of hydroponics, continues to gain popularity within commercial horticulture, and as it does, more and more products are developed for it. More sophisticated lighting, easier to mix nutrients...
August 10, 2004
This crop was mentioned in last year’s Pack Trials coverage, and since then, we have done some work on its production. The genus phygelius is a wonderful group of somewhat fuchsia-like plants that come from South Africa and belong to the...
July 08, 2004
Now that the spring season is behind everyone, it’s time to look back at how well you were able to grow vegetative annuals. I know I have written about growth control of these plants before, but I think this is a good time to reiterate what was...
July 08, 2004
Profitability in the greenhouse industry relies on high yields, innovative methods of production, new plant varieties, structural design, environmental controls, marketing, shipping and much more. Integrated Pest Management (IPM) programs play a key...
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