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April 02, 2002
Whether you’re a small, medium or large grower, it is important to remember the basics when choosing a structure for your situation. So, let’s review the fundamentals. Greenhouse Structures 101 Type of Crop. If you are hardening your crop, you...
April 02, 2002
“Change does not necessarily assure progress, but progress implacably requires change,” American historian Henry Steele Commager once said. A bearded Michigan man with jovial eyes and a thankful spirit captures the essence of this quote. His name is...
April 02, 2002
There are many new and different poinsettias being introduced; some think too many. Certainly, there are too many for one grower to produce. So how do you decide which cultivars to add to your selection? In the February issue of GPN, we reviewed the...
April 02, 2002
Fungal leaf spots are the most common and obvious diseases present during ornamental crop production. In most cases, they are easily noticed, and the temptation to guess specific causes is great. While certain characteristics may often be present...
March 18, 2002
During the mid 1990s, perennial departments saw ever-increasing sales, as gardeners rediscovered the more “traditional” plants from their grandparents’ generation. And perennials continue to be a growth market for growers across the country,...
March 18, 2002
What is the function of a growing structure? To control the environment or to assist the grower with manipulating healthy plant growth? Should the grower and the plants be forced to adapt to the environment the greenhouse provides, or should the...
March 18, 2002
I think this crop is a fantastic example of what our industry can do when it puts its mind to it. Six years ago, Angelonia angustifolia was a good little summer annual in the South, but unreliable both in hardiness and in vigor; it was also pretty...
March 18, 2002
Mechanization is normally defined as the replacement of a human task with a machine. Automatic transplanters are an example of mechanization. But, true automation encompasses more than mechanization. Automation involves the entire process, including...
March 18, 2002
Four sets of information are important when assessing the nutritional status of greenhouse crops and developing corrective procedures. First, determine irrigation water quality prior to developing the location. Do this during a wet and a dry period...
March 18, 2002
Commercial, field-grown cut flower production encompasses an incredible array of plant materials, including fresh, dried and preserved flowers, stems and berries. A large portion of fresh and dried cuts in North America is grown outdoors. Cuts are...
March 18, 2002
Debuting in 2001 with ‘Nu Blue’, ‘Burgundy Chrome’, ‘Shades of Pink’ and ‘Peach Glo’, the Ramblin’’ series’ determinate plant habit won’t take over the bench or garden bed,...
March 18, 2002
By the time you read this article, Easter lilies will have been planted, and flowering and height control are likely the major issues remaining for a successful conclusion of this crop. This year, Easter will be on March 31, 2002, and most plants...
March 18, 2002
The management of insecticide resistance is a somewhat controversial subject, and not because we are ignorant of the problem. In fact, scientists have a good handle on the mechanisms of pesticide resistance development. It is controversial because...
March 11, 2002
The only reason for a grower to automate is to improve their overall operation — an improvement that can be more than cost reduction. Improvements can also increase quality and response time. With all the equipment available in the marketplace today...
March 01, 2002
Two stars of the booming vegetatively propagated bedding plant market are petunias and calibrachoa. These closely related species offer consumers rapid growth, a wide range of colors and durability. The vigor of petunias and calibrachoa, while great...
March 01, 2002
With the introduction of so many new and unique poinsettia cultivars, it has become impractical for a grower to evaluate them all. In conjunction with the breeding companies, we organized these trials several years ago to screen the new...
March 01, 2002
Here it is, the middle of the plug season, and plug growers are wondering how to keep their plugs from stretching or flopping. With short days and low light conditions in much of the country during this time of the year, small seedlings want to...
February 18, 2002
With all the well-deserved attention that coleus hybrids are receiving for their landscape and interiorscape performance, it seems like a good time to take a look at some of the closer relatives of coleus that have the same strong characteristics...
February 18, 2002
What are greenhouse curtains? Greenhouse curtain systems are called shades, screens and even blankets. They consist of moveable panels of fabric or plastic film used to cover and uncover a greenhouse. Curtains may cover an area as small as a single...
February 18, 2002
One new development important to our understanding of Pythium species comes from the findings of molecular geneticists. We have long thought of Pythium as a “water mold fungus”— now it has been reclassified according to information gained from...