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 More... Free Download
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, More... Free Download
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 More... Free Download
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 More... Free Download
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 More...
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; More...
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.
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 More...
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 More...
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 More...
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 More... Free Download
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. More... Free Download
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 More... Free Download
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 More... Free Download
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 More... Free Download
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 More... Free Download
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 More... Free Download
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 More... Free Download
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 More... Free Download
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 More... Free Download
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 More... Free Download
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 More... Free Download
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 More... Free Download
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. More... Free Download
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 More... Free Download
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 More... Free Download
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 More... Free Download
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 More... Free Download
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 More... Free Download
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 More... Free Download
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 More... Free Download
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 More... Free Download
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 More... Free Download
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 More... Free Download
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 More... Free Download
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 More... Free Download
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. More... Free Download
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 More... Free Download