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June 10, 2015
Light and temperature are two of the most commonly manipulated environmental factors in greenhouse crop production. Supplemental lighting is useful during light-limiting conditions, while during high-light conditions, shading is often used to help...
June 10, 2015
'Glamour' euphorbia can tolerate cooler temperatures for seasonal landscape use. PanAmerican Seed recently introduced the first Euphorbia graminea from seed. The variety ‘Glitz’ offers growers a great opportunity to use this delicate appearing but...
June 10, 2015
The Go Go series is available in seven colors. Orange is pictured. Here I go again, this month I’m featuring another perennial that is not fully hardy across much of the country. Why do I occasionally feature such plants? Well sometimes there are...
June 10, 2015
Growers like Sustainable Local Foods use LED lighting to produce plants year round while keeping costs down. As many growers have found out over the course of human history, even the sun needs some help from time to time. It’s estimated that between...
June 10, 2015
'Veranda Lavender’  Roses have long captured the imagination, from William Shakespeare’s “A rose by any other name would smell as sweet” (“Romeo and Juliet”) or analogies about life using the imagery of a rose – “Some people grumble that roses...
June 10, 2015
Preparation of water samples to determine how PGRs influence the final spray solution pH. Plant growth regulators (PGRs) have become a common and necessary tool in greenhouse production to produce plants of appropriate size, quality and in flower...
June 10, 2015
The most common diseases on any group of ornamentals is based on a number of factors including how the plants are propagated, where they are utilized (landscape, indoors, bouquets) and what conditions the plants require for best growth. Herbaceous...
June 10, 2015
Each spring, growers and other horticulture professionals travel the California coast to get a sneak peek into the new varieties and trends that are in the pipeline for the coming season.   Each year, Team GPN joins in the week-long adventure...
June 10, 2015
The housing industry was hit hard by the economic recession. Growers and garden retailers felt a lot of that pain since no one was buying plants, trees and shrubs to decorate their new homes. But that is starting to change as the economy recovers...
May 12, 2015
Temperature is the primary factor that controls the rate of plant development.  Plants grow progressively faster as the average daily temperature increases. This is only true to a point though — obviously you can’t put plants in an oven to make...
May 12, 2015
Rex begonias are native to the tropical and subtropical regions of South and Central America, Africa and Asia. They have advanced as understory plants requiring a good amount of shade to flourish. The rex begonia varieties available today are...
May 12, 2015
  Heuchera is an incredibly popular genus of perennials, which has proven to be one of the most sought after plants in recent history. With what seemed to have been countless introductions over the past decade or so, it’s hard to comprehend how...
May 12, 2015
Demand for eco-friendly brands continues to increase in horticulture and beyond, and growers have responded by placing increased focus on local and organic programs. But what makes a retail plant “green” is more than the color of its leaves — the...
May 12, 2015
Gardens in 2015 are seeing bold colors and drought-resistant, easy-to-care-for plants that are suitable for containers, borders and landscapes. Each year, GPN compiles a list of award-winning varieties for the year to share with readers. Judges have...
May 12, 2015
This year marks the fourth edition of GPN’s 40 Under 40 program. Like the previous three classes, the members of the Class of 2015 are truly special. The 40 individuals in this year’s class represent all facets of horticulture, but they all have one...
May 12, 2015
Plant protection of greenhouse-grown horticultural crops requires a basic knowledge of the biology, behavior, and life cycle of the most common insect and mite pests such as aphids, whiteflies, thrips, and spider mites. It also requires a...
May 12, 2015
When you turn to page 12 of this issue of GPN, be prepared to look into the future. That is where you will find the GPN’s 40 Under 40 Class of 2015 — a gifted group of trailblazers who are really making things happen in our industry today and will...
April 13, 2015
Figure 1. Sprench applications of PGRs have become more popular on aggressive bedding plant crops such as petunia. I’ve noticed an increasing trend in the use of sprench applications of plant growth retardants (PGRs), especially by large-scale...
April 13, 2015
 Abalzin' salvia is currently offered in two colors: Tabasco and Purple. Salvia is one of the most traditional consumer gardening flowers, combining easy care and a long season of color with a host of other great traits. At one point salvia was...
April 13, 2015
‘Hipsters Zooey’ is heat tolerant and performs well across much of the country. Best leaf coloration occurs in locations with morning sun and afternoon shade. For more than twelve years I have featured a wide range of perennials in this column....
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