Jeffrey G. Williamson

Florida Peach and Nectarine Varieties

Ali Sarkhosh, Mercy Olmstead, Jose Chaparro, Pete Andersen, and Jeff Williamson

Cultivo de ciruelas en Florida

A. Sarkhosh, M. Olmstead, E. P. Miller, P. C. Andersen, J. G. Williamson y; traducción por Tatiana Sanchez

Evergreen Production System for Southern Highbush Blueberries in Florida

Douglas A. Phillips, Jeffrey G. Williamson, and Patricio R. Munoz

In central and south-central Florida, many southern highbush blueberries are grown in an evergreen system, where the plants do not go dormant, and are managed to retain their leaves from the previous year through harvest the following spring in order to support early flowering and fruit set. The evergreen system has also been used under tunnels in north-central Florida. This publication provides an overview of the evergreen production system for SHB in Florida.

Pruning Southern Highbush Blueberry in Florida

Douglas A. Phillips and Jeffrey G. Williamson

Pruning is an essential part of blueberry production and is used to help establish new plantings; promote postharvest growth of new foliage and fruiting wood; balance vegetative and reproductive growth; reduce disease and certain insect pressure; assist in harvesting efficiency; and promote new cane growth and plant longevity. The following is a discussion of pruning practices on southern highbush blueberry in Florida.

Oportunidades alternativas para fincas pequeñas: Producción de durazno y nectarinas versión revisada

Ali Sarkhosh, Mercy Olmstead, Jeff Williamson, Jose Chaparro, Juanita Popenoe; traducido por Eva Pabon

El suave clima invernal de Florida y el comienzo de la temprano de primavera ofrecen oportunidades únicas para la producción de duraznos y nectarinas de temporada temprana. Actualmente, Florida produce algunos de los duraznos y nectarinas de florecida temporada para producción comercial en América del Norte.

Alternative Opportunities for Small Farms: Peach and Nectarine Production Review

Ali Sarkhosh, Mercy Olmstead, Jeff Williamson, Jose Chaparro, and Juanita Popenoe

Growing Plums in Florida

A. Sarkhosh, M. Olmstead, E. P. Miller, P. C. Andersen, and J. G. Williamson

Establishment and Production Costs for Southern Highbush Blueberry Orchards in Florida: Enterprise Budget and Profitability Analysis

Ariel Singerman, Marina Burani-Arouca, Jeffrey G. Williamson, and Gary K. England

The Apple (Malus domestica, Rosaceae)

A. Sarkhosh, T. E. Crocker, W. B. Sherman, J. G. Williamson, and J. Popenoe

Production and Marketing of Chestnuts in the Southeastern United States

Robert C. Hochmuth, Robert D. Wallace, Peter J. Van Blokland, and Jeffrey G. Williamson

Blueberry Gardener's Guide

J. G. Williamson, P. M. Lyrene, and J. W. Olmstead

Home gardeners: Use this guide to successfully grow blueberries in Florida.

The Pomegranate

Ali Sarkhosh and Jeff Williamson

Nutrition and Fertilization Practices for Southern Highbush Blueberry in Florida

Doug Phillips and Jeffrey G. Williamson

This publication provides guidance and management suggestions to Florida growers of southern highbush blueberry (SHB) for monitoring, supplying, and maintaining proper plant nutrition in commercial production operations.

Calendar for Southern Highbush Blueberry Management in Florida

Douglas A. Phillips, Jeffrey G. Williamson, Philip F. Harmon, Oscar E. Liburd, and Peter J. Dittmar

Southern highbush blueberries (SHB) are commercially grown throughout Florida in both deciduous and evergreen systems. This calendar addresses general management requirements on a monthly basis for Florida commercial blueberry growers in conventional (nonorganic) systems and should be used in coordination with other UF/IFAS Extension EDIS publications.

Variedades de Durazno y Nectarina en la Florida

Ali Sarkhosh, Mercy Olmstead, José Chaparro, Pete Andersen, Jeff Williamson y Tatiana Sanchez

La Manzana (Malus domestica, Rosaceae)

A. Sarkhosh, T. E. Crocker, W. B. Sherman, J. G. Williamson, y J. Popenoe

La Granada en Florida: ¿una fruta de árbol para Florida?

Ali Sarkhosh, Jeff Williamson; traducido por Eva Pabon

A UF/IFAS numbered Translation. in support of UF/IFAS Extension program: Plant Systems

How to Calculate Fertigation Injection Rates for Commercial Blueberry Production

Guodong Liu, Jeffrey Williamson, Gary England, and Alicia Whidden

A UF/IFAS numbered Fact Sheet for Commercial audience(s).

Preparing a Southern Highbush Blueberry Field for Machine Harvesting

Jeffrey G. Williamson and Douglas A. Phillips

Blueberries are grown commercially in Florida for the early-season fresh fruit market. The majority of Florida’s blueberry crop is currently harvested by hand to ensure high quality standards for fresh fruit production. However, hand harvesting is the single greatest annual production cost for Florida blueberry growers, and mechanization of berry harvests could greatly reduce production costs. This is particularly important when considering the volume of fruit imported into the United States from countries where labor rates are significantly lower. Also, at times the availability of harvest labor when needed may be an issue for Florida growers; mechanization could help address that issue. This publication provides information for commercial blueberry growers interested in adopting machine harvesting.

Impacts of Hurricane Damage on Southern Highbush Blueberries

Douglas A. Phillips, Jeffrey G. Williamson, and Philip F. Harmon

This publication discusses the types of hurricane damage that can be incurred in blueberry production operations, the impacts of these damages, preparations to make before the storm arrives, and suggestions on best management practices in the aftermath of a storm.

Southern Highbush Blueberry Cultivars from the University of Florida

D. A. Phillips, J. G. Williamson, P. M. Lyrene, and P. R. Munoz

Cultivar selection involves weighing the advantages and disadvantages of a cultivar relative to the grower’s needs. Unfortunately, there are no perfect cultivars suited for every location and management system. The following discussion categorizes southern highbush cultivars into three groups: (1) new cultivars; (2) established cultivars; and (3) secondary and obsolete cultivars.

2024 Florida Blueberry Integrated Pest Management Guide

Philip F. Harmon, Oscar E. Liburd, Peter Dittmar, Jeffrey G. Williamson, and Doug Phillips

This publication is intended to be a resource for Florida blueberry growers to use in scouting for disease and insect/mite pest damage; managing disease, insect/mite pests, and weeds; and application of certain plant growth regulators.

A Step-by-Step Fertigation Guide for Blackberry Growers in Florida

Nurjahan Sriti, Elena Máximo-Salgado, Zhanao Deng, Jeffrey Williamson, and Guodong Liu

Blackberry cultivation offers significant opportunities for fruit producers in subtropical regions. Effective fertilizer management is essential for maximizing production. However, determining the optimal fertilizer application can be challenging as a result of variations in soil types and climate. To achieve the best results, it is important to follow the 5Rs of nutrient stewardship. (There are usually 4 Rs outside the unique environmental conditions of Florida.) These principles focus on applying the right fertilizer source at the right rate, at the right time, in the right place, and with the right irrigation. This guide provides Florida blackberry growers with practical recommendations for efficient fertigation practices to boost blackberry yields and improve nutrient use efficiency. It is intended for commercial growers, agricultural consultants, farm managers, Extension agents, Extension specialists, and others interested in blackberry production and sustainable farming.

Government Agency Resources for Florida Blueberry Growers

Douglas A. Phillips and Jeffrey G. Williamson

Several federal, state, and local government offices and agencies offer assistance and resources to Florida blueberry growers. These include the University of Florida and IFAS Extension, the U.S. Department of Agriculture (USDA), the Florida Department of Agriculture and Consumer Services (FDACS), and various Florida water management districts. This publication summarizes some of the resources and assistance available from each of these agencies, along with website links as a starting point for growers to use in learning more about and accessing that assistance.

What Is Urea-Triazone Nitrogen?

Guodong Liu and Jeffrey Williamson

A UF/IFAS numbered Fact Sheet. in support of UF/IFAS Extension program: Animal Systems

Organic Blueberry Production in Florida

Douglas A. Phillips, Peter J. Dittmar, Philip F. Harmon, Oscar E. Liburd, Danielle D. Treadwell, and Jeffrey G. Williamson

A UF/IFAS numbered peer reviewed Fact Sheet for Commercial audience(s). Published by Plant Systems

Citrus Propagation

Ute Albrecht, Mongi Zekri, and Jeffrey Williamson

This publication explains the different methods of citrus propagation and includes detailed descriptions and photographs of the grafting process and other principles of propagation. 

Florida’s Commercial Blueberry Industry

J. G. Williamson and D. A. Phillips

This publication provides background, statistics, and other information about the commercial blueberry industry in Florida.

Irrigation Practices for Southern Highbush Blueberry in Florida

Douglas A. Phillips and Jeffrey G. Williamson

This new 4-page publication of the UF/IFAS Horticultural Sciences Department provides guidance on irrigation requirements and practices to Florida Southern highbush blueberry growers. Written by Douglas A. Phillips and Jeffrey G. Williamson.

Protecting Blueberries from Freezes in Florida

J. G. Williamson and D. A. Phillips

Blueberries bloom in late winter or early spring in Florida, making the flowers and young fruit highly susceptible to freeze and frost injury. Killing freezes can occur as late as mid to late March throughout much of Florida, long after the initiation of bloom, especially for early-ripening southern highbush blueberry cultivars. This publication describes conditions that often occur in commercial blueberry fields during and after bloom when the potential for freeze damage exists. Practices that growers can use to minimize freeze damage are also discussed.