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Apple Scab of Flowering Crabapples
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Apple Scab of Flowering Crabapples

Flowering crabapples are susceptible to several diseases that result in yellow leaves and defoliation by early summer. Apple scab is one such disease. ...

Applying Plant Growth Retardants Pocket Reference
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Applying Plant Growth Retardants Pocket Reference

This brochure is a general reference to help greenhouse producers make basic decisions about applying plant growth retardants (PGRs) in greenhouse settings. The full version of this publication, Commercial Greenhouse and...

Commercial Greenhouse and Nursery Production: Alkalinity Management in Soilless Substrates
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Commercial Greenhouse and Nursery Production: Alkalinity Management in Soilless Substrates

Growers often do not have a clear understanding of the underlying causes behind increased substrate pH—water alkalinity, rather than water pH, is typically the source of the problem. This publication helps growers ...

Commercial Greenhouse and Nursery Production: Alternative Options for Invasive Landscape Plants
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Commercial Greenhouse and Nursery Production: Alternative Options for Invasive Landscape Plants

This publication lists potential alternatives to some of the most notorious and damaging invasive plants commonly used in Indiana landscapes. Unlike other resources, this list includes both native and non-native species....

Commercial Greenhouse and Nursery Production: Census of Agriculture Reveals Declines in Floriculture Producers
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Commercial Greenhouse and Nursery Production: Census of Agriculture Reveals Declines in Floriculture Producers

The U.S. Department of Agriculture National Agriculture Statistics Service (USDA-NASS) released the 2007 Census of Agriculture on February 4, 2009. State and federal policy makers, researchers, extension personnel, growe...

Commercial Greenhouse and Nursery Production: Controlling Algae in Irrigation Ponds
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Commercial Greenhouse and Nursery Production: Controlling Algae in Irrigation Ponds

Because water is so essential, commercial greenhouse and nursery operations need to maintain water supplies of sufficient quantity and quality to produce plant material profitably. This publication is not a comprehensive...

Commercial Greenhouse and Nursery Production: Evaluating Container Substrates and Their Components
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Commercial Greenhouse and Nursery Production: Evaluating Container Substrates and Their Components

One of the most important cultural considerations and investments you can make when you want to produce a successful greenhouse or nursery crop is to select the best substrate components or pre-formulated substrates (als...

Commercial Greenhouse and Nursery Production: Flower Induction of Annuals
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Commercial Greenhouse and Nursery Production: Flower Induction of Annuals

If annual bedding plants have even just a few flowers, customers get an idea of what the plant looks like in full bloom, which can increase impulse purchases. However, to be able to deliver to retailers annual bedding pl...

Commercial Greenhouse and Nursery Production: Lowering Soil pH for Horticulture Crops
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Commercial Greenhouse and Nursery Production: Lowering Soil pH for Horticulture Crops

Soil pH is important because it affects the availability of nutrients a plant needs to grow and thrive. This publication explains when lowering soil pH is important for commercial producers and recommends practices to sa...

Commercial Greenhouse and Nursery Production: Managing Photoperiod in the Greenhouse
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Commercial Greenhouse and Nursery Production: Managing Photoperiod in the Greenhouse

In greenhouse and nursery production, photoperiod can influence many aspects of plant growth and development including dormancy, storage organ formation, and (most importantly for many greenhouse producers) flowering. Th...

Commercial Greenhouse and Nursery Production: Poinsettia Propagation
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Commercial Greenhouse and Nursery Production: Poinsettia Propagation

Successful poinsettia propagation begins with high-quality cuttings and an ideal rooting environment. This publication describes optimal greenhouse conditions and management practices for improving propagation success an...

Commercial Greenhouse and Nursery Production: Sanitation for Disease and Pest Management
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Commercial Greenhouse and Nursery Production: Sanitation for Disease and Pest Management

Greenhouse growers are often concerned about the costs of managing pests and pathogens. Proper greenhouse sanitation is a key component in reducing those costs and improving plant quality. This publication discusses gene...

Commercial Greenhouse and Nursery Production: Soil pH
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Commercial Greenhouse and Nursery Production: Soil pH

Plants obtain nearly all their nutrients from the soil, but not all the nutrients present in the soil are accessible to plants. That's because soil pH affects the form and, therefore, solubility of nutrients. This public...

Commercial Greenhouse and Nursery Production: Water-soluble and Controlled-release Fertilization
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Commercial Greenhouse and Nursery Production: Water-soluble and Controlled-release Fertilization

Because the substrates used in commercial greenhouses do not contain soil, they lack many of the nutrients in sufficient quantity to maximize plant growth and development. This publication examines the basics of greenhou...

Commercial Greenhouse Production: Applying Plant Growth Retardants for Height Control
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Commercial Greenhouse Production: Applying Plant Growth Retardants for Height Control

Controlling plant size is one of the most important aspects of greenhouse crop production. An alternative, effective strategy for controlling plant height is to use chemical plant growth retardants (PGRs). The goals of t...

Commercial Greenhouse Production: Disease-resistant Annual and Perennial Production
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Commercial Greenhouse Production: Disease-resistant Annual and Perennial Production

One of the best ways to prevent serious plant disease outbreaks in the greenhouse, nursery, or landscape is to grow plants with demonstrated disease resistance. This publication describes disease resistance in plants, pr...

Commercial Greenhouse Production: Measuring Daily Light Integral in a Greenhouse
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Commercial Greenhouse Production: Measuring Daily Light Integral in a Greenhouse

In commercial greenhouses, several strategies can be used to help properly manage light levels throughout the day and seasonally. This publication examines the characteristics of greenhouse lighting and describes one man...

Commercial Greenhouse Production: pH and Electrical Conductivity Measurements in Soilless Substrates
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Commercial Greenhouse Production: pH and Electrical Conductivity Measurements in Soilless Substrates

Monitoring the pH and electrical conductivity (EC) of growing substrates is a way to correct issues before they become problems that damage crops. This publication recommends best practices for establishing a pH and EC t...

Compendium Of Herbicide Adjuvants, 2016 Edition
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Compendium Of Herbicide Adjuvants, 2016 Edition

This is a joint publication of Purdue Extension and Southern Illinois University. This is the 13th edition of the biennial publication, which was previously published by Southern Illinois. This edition contains 780 en...

Consumer Horticulture: Collecting Soil Samples for Testing
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Consumer Horticulture: Collecting Soil Samples for Testing

A soil test will reveal the current nutrient status in your soils and whether you need to add any nutrients as fertilizer. This publication describes the best practices for when and how to sample your soils.

...

Disease Management Strategies for Horticultural Crops: Fungicide Mobility for Nursery, Greenhouse, and Landscape Professionals
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Disease Management Strategies for Horticultural Crops: Fungicide Mobility for Nursery, Greenhouse, and Landscape Professionals

This publication describes fungicide mobility, which is the how fungicides move after they are applied to plants.

Format: PDF

Pages: 3

Language: ...

Disease Management Strategies for Horticultural Crops: Fungicide Resistance Management for Pome Fruit
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Disease Management Strategies for Horticultural Crops: Fungicide Resistance Management for Pome Fruit

This publication examines how fungicides are classified and recommends management practices particular to pome fruit that can prevent fungi from developing resistance to these products.

Format:...

Disease Management Strategies for Horticultural Crops: Fungicide Rotations for Nursery, Greenhouse, and Landscape Professionals
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Disease Management Strategies for Horticultural Crops: Fungicide Rotations for Nursery, Greenhouse, and Landscape Professionals

This publication examines how fungicides are classified and recommends management practices to prevent fungi from developing resistance to these products.

Format: PDF

Pages...

Disease Management Strategies for Horticultural Crops: Pythium Root Rot of Herbaceous Plants
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Disease Management Strategies for Horticultural Crops: Pythium Root Rot of Herbaceous Plants

Several species of Pythium attack plant roots, and cause cutting rots, stem rots, and foliar blight under the right conditions. These pathogens are a significant problem in the greenhouse and nursery industries....

Driftwatch: Watch Out for Grapes
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Driftwatch: Watch Out for Grapes

Pesticide drift can severely damage non-target crops. This Driftwatch publication addresses drift in grapes. It examines products of special concern, injury symptoms and potential impact, and alternatives and ways to avo...

Effects of Cold Weather on Horticultural Plants in Indiana
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Effects of Cold Weather on Horticultural Plants in Indiana

Cold weather can injure fruit and vegetable crops, and ornamental plants, in fall, winter, and spring. This updated publication identifies types of injury, factors that influence the degree of injury, and steps that can ...

Fall Webworm
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Fall Webworm

In late summer, the outside branches of many of the more commonly planted deciduous trees can become covered with webs produced by fall webworm caterpillars. When unchecked by the wide variety of insects and birds that ...

Financial and Tax Aspects of Tree Planting
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Financial and Tax Aspects of Tree Planting

This publication helps hardwood producers understand the tax and financial advantages (and disadvantages) related to their planting operations....

Greenhouse and Indoor Production of Horticultural Crops: Details of Electrical Conductivity Measurements in Greenhouse Production
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Greenhouse and Indoor Production of Horticultural Crops: Details of Electrical Conductivity Measurements in Greenhouse Production

This publication explains the details of substrate electrical conductivity (EC) for greenhouse growers.

Fo...

Greenhouse and Indoor Production of Horticultural Crops: Detecting Crop Light Use from Normalized Difference Vegetation Index (NDVI)
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Greenhouse and Indoor Production of Horticultural Crops: Detecting Crop Light Use from Normalized Difference Vegetation Index (NDVI)

This publication describes the importance of measuring plant light use, and then describes a study that offers some promise of ...

Greenhouse and Indoor Production of Horticultural Crops: Determining the Economic Value of Providing Supplemental Light to Lettuce During Winter Production
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Greenhouse and Indoor Production of Horticultural Crops: Determining the Economic Value of Providing Supplemental Light to Lettuce During Winter Production

This publication aims to provide information to growers about estimating the costs and benefits when they use supplemental lighting.

Format: PDF

Pages: 4

...

Greenhouse and Indoor Production of Horticultural Crops: Optimal Fertilizer Concentration for Early vs. Late Flowering Petunia Varieties
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Greenhouse and Indoor Production of Horticultural Crops: Optimal Fertilizer Concentration for Early vs. Late Flowering Petunia Varieties

Early-flowering varieties of petunia may have different fertilizer needs than late-flowering varieties. However, fertilizer recommendations are usually not variety-specific. This fact sheet provides information on the op...

Greenhouse and Indoor Production of Horticultural Crops: Pour-through Technique of Measuring Electrical Conductivity of the Substrate
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Greenhouse and Indoor Production of Horticultural Crops: Pour-through Technique of Measuring Electrical Conductivity of the Substrate

This publication will help you accurately perform the pour-through technique for measuring substrate electrical conductivity (EC).

Format: PDF

Pages: 3

La...

Greenhouse and Indoor Production of Horticultural Crops: Starter Fertilizer Can Provide Substantial Amount of Nutrients in Sub-irrigation
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Greenhouse and Indoor Production of Horticultural Crops: Starter Fertilizer Can Provide Substantial Amount of Nutrients in Sub-irrigation

This publication summarizes how much additional fertilizer a crop needs under sub-irrigation when the growing medium contains...

Greenhouse and Indoor Production of Horticultural Crops: Understanding the Pores of a Soilless Substrate
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Greenhouse and Indoor Production of Horticultural Crops: Understanding the Pores of a Soilless Substrate

This publication details substrate characteristic s and provides research-based information about them as a reference to guide growers.

Format:...

Guide to Information for Starting in the Nursery Business
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Guide to Information for Starting in the Nursery Business

This is a reference list of informative publications which can provide answers to many of the questions which arise when considering a new nursery business. ...

Guide to Production Information for Commercial Floriculture Growers
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Guide to Production Information for Commercial Floriculture Growers

This publication provides a reference list of informative publications for experienced and new commercial producers of floricultural crops, with accompanying descriptions. ...

Guide to Production Information for the Commercial Nursery Crop Grower
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Guide to Production Information for the Commercial Nursery Crop Grower

This publication is a reference list of informative publications which can provide answers and guidance to the commercial nursery grower on topics from propagation to pest management. ...

Indiana High Tunnel Handbook
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Indiana High Tunnel Handbook

This publication is a resource for those who are considering high tunnel production or are relative beginners. This resource describes: selecting the right size and type of high tunnel for your operation, choosing a s...

List of Assistance and Regulatory Agencies for Starting in the Nursery Business
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List of Assistance and Regulatory Agencies for Starting in the Nursery Business

This publication is a listing of Federal and Indiana state government agencies that regulate various activities involved in operating a landscape plant nursery. ...

Living with Insects Blog
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Living with Insects Blog

The author uses this blog in conjunction with a class as a forum for exploring all subjects touching upon insects and arthropods. Comments are encouraged, but moderated, to encourage a thoughtful community. The author, J...

Measuring Daily Light Integral (DLI)
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Measuring Daily Light Integral (DLI)

This brochure provides basic information about measuring Daily Light Integrals (DLI) in greenhouses, including DLI requirements for certain crops.

The full version of this publication is available in

Produccion Comercial de Cultivos Bajo Invernadero Y Viveros: El control de Algas en las Lagunas de Riego
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Produccion Comercial de Cultivos Bajo Invernadero Y Viveros: El control de Algas en las Lagunas de Riego

Dado que el agua es un elemento esencial, invernaderos comerciales y operaciones de viveros necesitan mantener el abastecimiento de agua en cantidad y calidad suficiente para producir plantas de manera rentable. Esta pub...

Produccion Comercial de Cultivos Bajo Invernadero Y Viveros: Manejo de la Alcalinidad en Sustratos Hidropónicos
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Produccion Comercial de Cultivos Bajo Invernadero Y Viveros: Manejo de la Alcalinidad en Sustratos Hidropónicos

Productores de invernaderos y viveros muchas veces asumen que la presencia de hojas amarillas o pálidas son signos de deficiencias nutricionales. A veces, sin embargo, el problema se debe a la ausencia de nutrientes...

Produccion Comercial de Cultivos Bajo Invernadero Y Viveros: Medición de Luz Diaria Integrada en Invernaderos
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Produccion Comercial de Cultivos Bajo Invernadero Y Viveros: Medición de Luz Diaria Integrada en Invernaderos

En la producción comercial bajo invernadero varias estrategias pueden emplearse para manejar de manera adecuada los niveles de luz a lo largo del día y según las temporadas del año. Esta publicaci...

Produccion Comercial de Cultivos Bajo Invernadero Y Viveros: Medición de pH y Conductividad Eléctrica en Sustratos
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Produccion Comercial de Cultivos Bajo Invernadero Y Viveros: Medición de pH y Conductividad Eléctrica en Sustratos

El monitoreo del pH y la conductividad eléctrica (CE) de medios de crecimiento nos da la habilidad de corregir este tipo de inconvenientes antes de que se conviertan en problemas que pudieran perjudicar a los cultiv...

Produccion Comercial de Flores en Invernadero: Propagacion de Poinsettias (Flores de Pascua)
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Produccion Comercial de Flores en Invernadero: Propagacion de Poinsettias (Flores de Pascua)

La propagacion exitosa de poinsettias (flores de pascua o nochebuena) empieza con una alta calidad de los esquejes y un ambiente ideal para el desarrollo radicular. Esta publicacion describe cuales son las condiciones op...

Protecting Pollinators: Tips for Commercial Agricultural Pesticide Applicators
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Protecting Pollinators: Tips for Commercial Agricultural Pesticide Applicators

While agricultural pesticide applicators may not be able to control factors like habitat loss, they can take practical steps to help protect the pollinators so many in the agricultural industry rely upon. This publica...

Root Rot in Landscape Plants
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Root Rot in Landscape Plants

Root problems in plants are frequently under- and misdiagnosed. Sometimes it's too late to save the plant. This publication, part of the Plant Pathology in the Landscape series, discusses predisposing factors, diagnosis,...

Slowing Growth of Ornamentals for Holding Plants in Greenhouses
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Slowing Growth of Ornamentals for Holding Plants in Greenhouses

In this publication, a Purdue University researcher discusses ways to slow plant growth - a major concern for greenhouse owners during the COVID-19 pandemic. Sales are down but ornamental plants continue to grow. It's im...

Starting in the Nursery Business
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Starting in the Nursery Business

This publication discusses starting in the nursery business, including what you'll need, developing a nursery business plan, selecting a specific nursery site, nursery design and space requirements, and labor and capit...

Tree Diseases: Oak Wilt in Indiana
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Tree Diseases: Oak Wilt in Indiana

This publication describes the symptoms of oak wilt disease, its cause, and management options that are available.

Format: PDF

Pages: 5

Language:

Tree Diseases: White Pine Decline in Indiana
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Tree Diseases: White Pine Decline in Indiana

White pine trees are a common component of Midwest landscapes. Sometimes, these trees die unexpectedly and rapidly, seemingly without a specific cause. This unpredictable problem is called white pine decline. The publ...

U.S. Landscape Firms Surveys: Business Practices of Landscape Firms
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U.S. Landscape Firms Surveys: Business Practices of Landscape Firms

This publication provides information about the product mix, advertising, marketing, and other business practices of U.S. landscape firms and compares them by their business diversification strategies (landscape only;...

Weed Competition Control in Hardwood Plantations
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Weed Competition Control in Hardwood Plantations

A publication for landowners with wooded areas. Covers weed control strategies and related issues....