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May 12, 2004
Growers around the country face a decision when producing bedding plants for the Deep South and similar climates around the world. There, flowers may flourish year-round; however, the moderate to high temperatures and ample moisture fuel the fires...
May 12, 2004
There is a place in nearly every landscape design for ornamental grasses. Perhaps the most suitable and versatile ornamental grasses are the pennisetum cultivars. Pennisetum varieties range in size from 6 inches to 8 feet high. They are easy to grow...
April 16, 2004
Creating gorgeous mixed containers isn’t just for retailers and consumers; your creative expertise can be used as well! We all know that mixed containers are hot at retail right now. So, to keep customers happy, growers need to offer specialty...
April 16, 2004
In Greek the name delphinium translates to “dolphin flower,” describing the shape of the spur on the upper part of the flower. With an abundance of deep blue flowers, combined with its compact habit of only 8-14 inches in height, Summer Nights is an...
April 16, 2004
As consumers realize their appeal, pansies and violas are increasingly being planted outdoors in late summer and early autumn. Consequently, the production of flowering pansy continues to increase, especially for sales in late summer. To meet...
April 16, 2004
The uproar over Ralstonia in geraniums during the past year or so is more a sign of the times than the state of bacterial disease control in the ornamentals industry. If the same thing happened 10 years ago the level of concern would surely not have...
March 11, 2004
Downy mildew on impatiens has been recently diagnosed in Michigan. Growers visiting from the United Kingdom last November mentioned that they had experienced a severe outbreak of downy mildew on hybrid impatiens earlier in the year. The disease had...
March 11, 2004
Generally, at this time of the spring season, I get a number of phone calls from concerned growers who say their plants are turning yellow, stunted or generally not growing the way they should. After a few questions, it becomes apparent that the...
March 11, 2004
Aquilegia, commonly known as columbine, is one of the best-known, old-fashioned perennials that still delivers great appeal in today’s gardens, and thanks to breeding improvements, this genus keeps getting better. The aquilegia Swan series is a...
March 11, 2004
Lantana has undergone many improvements in the past few years, which is good because it was already a phenomenal plant to begin with. Depending on where you live in the United States, it is either an annual, perennial or woody shrub. In all parts of...
February 24, 2004
The silverleaf whitefly, Bemisia argentifolii, invaded greenhouses in the United States in the late 80s and has been a major concern for growers ever since. A big step in the management of this pest was the introduction of imidacloprid (Marathon)...
February 24, 2004
Named after a French botany patron, M. Gaillard, gaillardia (blanket flower) has been a staple of the highway wildflower seed program for decades and is the state flower of Oklahoma. The genus has a reputation for being tough, salt tolerant,...
February 23, 2004
Ajuga ‘Black Scallop’ is a stoloniferous perennial groundcover with deeply bronzed, beautifully scalloped leaves. Cultivars of ajuga belong to the mint family (Lamiaceae), which includes many commercially grown perennials and herbs including...
January 22, 2004
We talked about succulents last month, and these crops are two groups there wasn't space for in that column. With all the emphasis on low water use and the constant demand for color, these two crops should be a mainstay for growers. Incorporating...
January 22, 2004
Val-Co Environmental & Greenhouse Systems, Bird-In-Hand, Pa., kept durability in mind when manufacturing the Better Bench System. The Better Bench, greenhouse/garden center bench is cost effective and has a high weight to square foot ratio, yet...
January 22, 2004
Being a "die hard" plant lover and a commercial perennial grower, I've discovered that there are a lot of really cool plants out there. But how many times are the cool plants not conducive to commercial production? They are, more often than not,...
January 22, 2004
Over the past five years, with the support of Floriculture Industry Research and Scholarship Trust (FIRST), we conducted a series of experiments to develop guidelines for using the daily light integral (DLI) to gauge the light environment in...
January 22, 2004
The first article I wrote for GPN was on Botrytis prevention and control, and it appeared in October of 1998. Five years is probably long enough to wait to do an update since we have maintained an active research program in fungicide control of...
December 12, 2003
Growers often consider tiarella cultivars prime candidates for their product mix for shady locations. After all, tiarellas provide interesting, deeply cut foliage with contrasting leaf patterns and extended bloom times, and they are easy to produce...
December 12, 2003
A number of inexpensive pen-like instruments are available that can be used in the greenhouse to determine growth medium pH and soluble salts. The cost of the individual pH and electrical conductivity (EC) "pens" ranges from $50-80, and a...
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