The ISU Extension Store offers a number of publications for purchase or in a free downloadable PDF document. Publications related to flowers, lawn care, vegetables, trees and more can be found below to help you navigate to the information you need. The drop down menu will guide you to several categories containing publications, all relating to horticulture. If you have additional questions on a certain plant or problem call the Hortline at 515-294-3108 or browse our Frequently Asked Questions!

Opciones de control del barrenador verde esmeralda
Dueños de propiedades y los aplicadores de pesticidas comerciales encontrarán medidas de control a considerar para prevenir y tratar la infestación de fresnos por el barrenador verde esmeralda. Incluye recomendaciones de productos y evaluación de eficacia de los insecticidas. Spanish version of Emerald Ash Borer Management Options.
Emerald Ash Borer Management Options
Homeowners and commercial pesticide applicators will find control measures to consider in preventing and treating the infestation of ash trees by the emerald ash borer. Includes product recommendations and evaluation of insecticide effectiveness.
Hop Production 101: Commercial Hop Yard Trellis Design
As hop production returns to Iowa, growers are wanting more information on producing healthy and abundant harvests. This publication discusses the best practices for designing and constructing a hops yard.
Suggested soil micronutrient levels and sampling procedures for vegetable crops
Although needed in very small amounts, micronutrients have an important role to play in plant growth and development. Most of them are involved in enzymatic reactions that are essential for plant survival such as photosynthesis and respiration. This publication highlights the major roles, deficiencies, and toxicity symptoms of micronutrients in plants and provides an understanding of the interactions between micronutrients in the soil.
Crop Rotations, Composting and Cover Crops for Organic Vegetable Production
Organic production and consumption has increased to a $39.5 billion industry in the United States with over 22,000 organic farmers. Over 5.4 million acres are in organic production in the U.S., including 164,403 acres of organic vegetables, valued at $1.3 billion. The majority of organic vegetable growers incorporate crop rotations, composting, and cover crops in their operations. The following information offers a guide for including these practices to meet certified organic rules and increase the long-term sustainability of an organic farm.
Commercial Asparagus Production
Asparagus is a hardy perennial of the lily family. The plant originated in the coastal regions of Europe and Asia but is now grown throughout the world. It is one of the first vegetable crops to be available in the early spring, along with leafy greens. Once established, a well-cared for asparagus field can remain productive for 15 to 20 years.
Commercial Melon Production
The melon family is comprised of muskmelon, watermelon, and honeydew melons, with all belonging to the cucurbitaceae family. This publication discusses commercial site selection, planting, cultivars, pollination, fertilization, irrigation, weed management and harvesting of melons.
Commercial Production of Pak Choi
Pak choi is a cool-season vegetable that belongs to the cabbage and cauliflower family. It is also known as bok choi, or pak choy. It originated in China and has been cultivated for thousands of years. Pak choi has rapidly been gaining popularity in the Midwest due to its mild flavor, suitability as a stir fry vegetable, and wide acceptance among consumers. Many farmers markets, community supported agriculture vendors, and local grocery stores feature pak choi in produce boxes.
Ticks and Tick-borne Diseases in Iowa
Ticks can be found across the state of Iowa and are active from March through November. This publication discusses the three most common type of ticks in the state while also providing information on preventing Lyme disease and removing attached ticks.
A Review of Cold Climate Grape Cultivars
There has been interest in growing grapes in the upper Midwest and other cold climate regions of North America. One of the problems growers face in these regions is selecting cultivars (cultivated varieties) that will withstand severe winters, mature in short growing seasons, and be productive. As grape acreage increases in cold climate regions, too often cultivar selections are being made based upon testimonial or anecdotal information. With the high costs of vineyard establishment there is an increasing need for a standard reference to assist growers in selecting best adapted cultivars.
Introduction to High Tunnels eCourse
This self-directed, online course covers all aspects of constructing, owning and operating a high tunnel. Throughout the course, you will learn how to properly select a site location, test your soils, determine what crops to grow in your high tunnel, expected costs and potential returns from your high tunnel and resources to help in the process. Each section of the course includes a worksheet for feedback from the course coordinators specific to your own operation.
Hop Production 101: Site selection and planting
As hop production returns to Iowa, growers are wanting more information on producing healthy and abundant harvests. This publication discusses the best practices for selecting a site to grow hops and how to plant the crop.
Scale Insects on Ornamental Landscape Plants
Scale insects are tiny insects that can cause large problems for landscape plants. Despite their small size they can weaken and even kill ornamental plants. This publication provides information on identifying these insects and steps that can be taken to remove them from plants through biological, mechanical and chemical means. Previously known as IC 0415
Identifying Tree Problems - Sustainable Urban Landscapes
Use this 8-page publication filled with guidelines for examining unhealthy trees and finding expert help.
Hop Production Calendar
This publication provides information on tasks that must be completed to produce a healthy hop crop. Broken down month-by-month, it provides reminders and tips for growing hops. It also includes additional resources that can be helpful to hop growers.
2018 Garden Calendar - Celebrating with Plants
Throughout the year we celebrate holidays and special events with family gatherings and traditional foods. Plants are another important feature in many celebrations. From poinsettias at Christmas, to roses on Valentine's Day, to Jack o'lanterns on Halloween, horticulture is an integral part of many celebrations. This monthly calendar features a striking holiday-inspired horticulture image and the story behind the tradition. The large calendar grid offers space to create a gardening journal to record the progress of your own garden.
Iowa High Tunnel Fruit and Vegetable Production Manual
This publication provides growers with information to use high tunnels effectively, enhance productivity and increase income. Construction and management of high tunnels is included, as well as information on crops that can be grown.
Plant and Insect Diagnostic Clinic Sample Submission Form
Download and use this form when submitting a plant problem (plant disease or insects/mites on plants), an insect for identification, a plant for identification, or a mushroom for identification. This form consolidates and replaces: PIDC 0031 PIDC 0033 PIDC 0042 PIDC 0043
Plant and Insect Diagnostic Clinic Plant Nematode Sample Submission Form
Download and use this form when submitting soil samples for nematode identification and counts. This form is for soybean cyst nematode egg counts, nematodes on corn, turfgrass nematodes, nematodes found in vegetable or fruit crop fields, as well as home gardens. Also includes instructions on collecting and shipping plant and soil samples for nematode analysis at the ISU Plant and Insect Diagnostic Clinic.
Top 13 vegetables to donate to food pantries
Many gardeners produce excess vegetables during the growing season. Some preserve their surplus vegetables for later use, while others give friends and neighbors the extras. Another option for using this excess produce could be a local food pantry. This publication discusses 13 vegetables that can be donated to food pantries and tips for growing and harvesting those vegetables.
Verticillium Wilt of Woody Plants -- Sustainable Urban Landscapes
Learn about symptoms and management strategies for this fungal disease. This pub also provides a list of susceptible and resistant species.
Hosta Diseases and Pests -- Sustainable Urban Landscapes
Easily identify common diseases and pests and how to manage them effectively.
Leaf Spot and Melting Out of Turfgrass -- Sustainable Urban Landscapes
Description and management information, plus how to submit samples for diagnosis.
Got Plant or Insect Problems?
The ISU Plant and Insect Diagnostic Clinic helps Iowans diagnose and manage plant diseases, weeds, and insects in fields and around your home. Here's an introduction to the clinic.
Protecting Bees in Iowa
Beekeepers and commercial pesticide applicators play important roles in protecting Iowa's bees. This publication outlines actions both groups can take to reduce the risks to bees that benefit Iowa's agroecosystem.
Juniper Diseases
Help with identification and control of the most common juniper diseases. Color photos and tables.
Houseplant Insect Control
Prevention is the first step in controlling houseplant insects. This web-only guide provides descriptions and photos of nine common houseplant pests plus suggestions for treatment.
Anthracnose of Shade Trees
Anthracnose is one of the most common foliage diseases of shade trees in Iowa. Find out about symptoms and management. Color photos.
Morels, False Morels and Other Cup Fungi
Learn about local morels and fungi. Includes many pictures to help you identify morels. Also has info on safe use of fungi as food.
References and Resources for Prairies and Native Plantings -- Sustainable Urban Landscapes
Prairie plants and other native plants are returning to the Iowa landscape. This publication offers a list of resources that will help those planning to create any size prairie plantings.
Prairies and Native Plantings as Outdoor Classrooms -- Sustainable Urban Landscapes
This publication outlines a process and the resources needed to help establish prairie to be used as an outdoor classroom. Such a classroom can be used to educate elementary through high school aged students about science, math, language arts, social studies and the arts.
Introduction to Iowa Native Prairie Plants -- Sustainable Urban Landscapes
Find out more about native plants and their uses in a garden or large planting. Includes more than 20 color photos, plus a detailed chart of prairie plant characteristics.
National Directory Organic Agriculture Expertise July 2005
This publication contains contact information on self-identified organic agriculture experts from 42 states and several countries around the world.
Especially for Kids! Where in the World? -- Reiman Gardens
Encourage children to explore the Reiman Gardens to find plants that are native to other countries. Then they can check off each plant that they find on the included map and draw a line to its native country.
Especially for Kids! Plant Zoo -- Reiman Gardens
Discover the many plants that have been named after animals. Public gardens, such as Reiman Gardens, have several of the plants described here.
Especially for Kids! Insect Investigator -- Reiman Gardens
Learn how to keep an insect investigator journal and see how many of the world's one million different types of insects you can find.
Growing and Using Basil -- Reiman Gardens
Basil is a member of the mint family with an aroma like mint and tea. Learn about its history, uses, culture, harvesting, preparation, and the different basil varieties.
Viburnums: Ideal Shrubs for Iowa Landscapes
Learn about the best viburnum species and cultivars for mid-Iowa (hardiness zones 4 and 5); also site selection and care and maintenance.
Growing Rhododendrons and Azaleas in Iowa
To successfully grow in Iowa, select cold hardy varieties, choose suitable planting sites, and follow recommended planting procedures.
Lichens -- Reiman Gardens
Many gardeners are concerned about unusual gray-green growths on tree trunks and branches. Learn more lichens, where they are found, and their different types and uses.
Guidelines for Selecting Trees
Selecting a single tree for your yard or several hundred for your community will be more rewarding if you take time to critically evaluate the proposed planting site and the reasons for planting trees on that site.
Iowa's Oaks -- Reiman Gardens
Learn more about Iowa'€™s official state tree and the twelve different species native to Iowa.
Water Gardens: FAQs -- Reiman Gardens
Starting and maintaining a water garden of any size inevitably brings questions. Find answers to the most commonly asked questions here.
Rain Gardens: Filtering and Recycling Rain Water
Rain gardens collect and filter rain water to improve storm water management. They also can provide an attractive habitat for birds, butterflies, and beneficial insects.
Iowa Butterfly and Caterpillar Food Preferences -- Reiman Gardens
Find out about providing food and nectar sources in our landscapes and gardens to support and encourage butterfly habitat. Approximately 75 species of butterflies have been recorded in Iowa.
Water Gardens: Aquatic Plants -- Reiman Gardens
Learn how to start a water garden. Topics include plant selection, floating plants, submerged plants, shallow marginal plants, deep water plants, planting methods, and fertilizing plants.