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Information on choosing, planting and maintaining ornamentals and floriculture, including pruning, diagnosing plant health, plant life cycles, container gardening, repotting, fertilizing, water quality checklist and integrated pest management.

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Photo: Alyssa Collins
Penn State Flower Trials Aid Industry, Consumers in Picking Posies - News News
The Penn State Flower Trials — in its 85th year — has a powerful benefit in Pennsylvania and beyond. Penn State's Southeast Agricultural Research and Extension Center in Manheim, Lancaster County, serves as the epicenter of the trials. More
An African Marigold being grown at the proper pH. Photo: Tom Ford, Penn State
Milk is Not a Substitute for Flowable Lime Rescue Treatments - News News
Low media pH has been known to increase the risk of iron and manganese toxicity in some horticultural crops like geraniums and African marigolds. More
Sowbugs and pillbugs congregate in moist areas. Photo by Sinclair Adam.
Sowbugs and Pillbugs: Occasional but Destructive Greenhouse Pests - Articles Articles
We hear periodic reports of sowbug and/or pillbug outbreaks in greenhouses and high tunnels in Pennsylvania. More
How good is your greenhouse water?
Water Quality Checklist for Greenhouse Growers - Articles Articles
A quick check of the quality of water you use for irrigation and pesticide application can save you time and headaches in the future. More
When retail greenhouse space gets scarce, plants literally get stacked up. Photo: L. Stivers, Penn State
When Plants Back Up in the Retail Greenhouse - Articles Articles
Timing product supply and quality with peak customer demand is often a challenge for greenhouse operators. More
Altenanthera spp. Photo: T. Ford, Penn State
Elevated Sodium in Irrigation Water and Crop Injury - Articles Articles
Elevated sodium and chloride levels are being observed more frequently in private water supplies in rural areas. More
Plants for Your Office
Plants for Your Office - Articles Articles
Green plants make a welcome addition to any office, but did you know that plants could actually clean the air? More
Long-blooming Perennials
Long-blooming Perennials - Articles Articles
A listing of perennial plants with long bloom times. More
Handling and Planting "Bare Root" Plants in the Home Landscape
Handling and Planting "Bare Root" Plants in the Home Landscape - Articles Articles
How to choose and get the best results from 'bare root' trees, shrubs, and other perrenials. More
Greenhouse IPM
Greenhouse IPM - Articles Articles
PA IPM has devoted a great deal of effort to designing IPM solutions for greenhouse production, particularly biological control. More
Chrysanthemums
Chrysanthemums - Articles Articles
How to get great mums without a lot of work. More
Container Gardening
The Art of Container Gardening - Articles Articles
Constructing a container garden isn’t about doing everything perfectly. In fact, there is no right way to create a container garden. More
Pruning Flowering Shrubs
Pruning Flowering Shrubs - Articles Articles
The correct time to prune your flowering shrubs depends on when they flower. More
Frost damage on ash
Will My Woody Plants Recover from Freeze Damage - Articles Articles
When we have unusually high temperatures in early spring, many woody trees and shrubs will break bud and leaf out or flower early. More
Tissue cultured plantlets: just from the lab
Tissue Culture Finishing for Greenhouse Growers: Stage III-Stage IV - Articles Articles
In the past 25 years great development has occurred in tissue culture plant production for horticulture. More
Scheduling Disease Control In Woody Ornamentals
Scheduling Disease Control In Woody Ornamentals - Articles Articles
The scheduling of effective disease management measures is not a simple task nor can it be standardized. More
Plant with Care
Plant with Care - Articles Articles

Plant with Care

Emelie Swackhamer, J. Robert Nuss, Larry Kuhns, Gregory Hoover

One of the most important steps you can take to ensure the health and long life of your plants is to plant them correctly. More
Keeping Plants Well Groomed
Keeping Plants Well Groomed - Articles Articles

Keeping Plants Well Groomed

Emelie Swackhamer, J. Robert Nuss, Larry Kuhns, Gregory Hoover

Debris that builds up in the landscape can harbor pests and plant diseases. More
Introduction to Creating Healthy Landscapes
Introduction to Creating Healthy Landscapes - Articles Articles

Introduction to Creating Healthy Landscapes

Emelie Swackhamer, J. Robert Nuss, Larry Kuhns, Gregory Hoover

When a plant looks unhealthy or has been injured by an insect or a mite, often our first impulse is to apply a pesticide. More
Choosing Plants Wisely
Choosing Plants Wisely - Articles Articles

Choosing Plants Wisely

Emelie Swackhamer, J. Robert Nuss, Larry Kuhns, Gregory Hoover

To create and maintain a healthy landscape, choose plants that are suited to the conditions in your yard. More
Extendiendo la Temporada Productiva con Túneles Altos
Extendiendo la Temporada Productiva con Túneles Altos - Articles Articles
Los túneles altos ofrecen protección a las plantas de tierras saturadas de humedad y temperaturas bajas en la primavera y el otoño con lo cual se extiende la temporada productiva. More
Extending the Garden Season with High Tunnels
Extending the Garden Season with High Tunnels - Articles Articles

Extending the Garden Season with High Tunnels

Elsa Sanchez, Ph.D., Michael Orzolek, Ph.D.

High tunnels offer plants protection from wet, saturated soils and low temperatures in the spring and fall, thereby extending the gardening season. More
Western Pennsylvania greenhouse operators gathered at Gumto Greenhouses on February 25th to tour the operation and to learn about energy efficiency.
Ten Easy Steps to Improve Greenhouse Efficiency - Articles Articles

Ten Easy Steps to Improve Greenhouse Efficiency

Daniel Ciolkosz, P.E., Lee Stivers

Winter low temperatures and high energy prices have greenhouse operators across the state looking for ways to manage heating and power costs. More
Over-Fertilization of Potted Plants
Over-Fertilization of Potted Plants - Articles Articles

Over-Fertilization of Potted Plants

Gary W. Moorman, Ph.D.

Over-fertilization of commercial pot or container-grown crops results in high concentrations of soluble salts in the potting medium. More
Gardening Prep during the Cold Winter Months
Gardening Prep during the Cold Winter Months - Articles Articles
The winter temperatures in northeastern Pennsylvania don’t really feel like gardening weather. More
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