Penn State University Libraries - Onions

• AZ Master Gardener Manual : Onions (Arizona Cooperative Extension)

Arizona Cooperative Extension provides information about 1) environmental preferences, 2) cultural practices and common problems in planting onions, and 3) harvesting and storage methods. 

• Frequently Asked Onion Gardening Questions and Answers (University of Missouri Extension)

This University of Missouri Extension page lists frequently asked questions and answers regarding onion gardening. 

• Growing Onions (Farm and Garden.com)

This Farm & Garden page provides not only general information about onion but also gardening information such as seeding, germination, transplanting, and watering.  

• Growing Onions (The University of Minnesota Extension Service)

The University of Minnesota Extension Service introduces three different onion planting methods - sets, direct seeding, and transplanting-, and how to harvest onions. 

• Growing Onions in the Home Garden (Horticulture and Home Pest News in Iowa State University)

Horticulture & Home Pest News explains three onion planting methods; 1) seed, 2) set, and 3) plant. 

• Growing Onions in the Home Garden (Ohio State University Extension Fact Sheet)

This Fact Sheet provides onion gardening information about climatic requirements, soil requirements, Fertilizers, establishing the planting, cultural practices, and harvesting. 

• Home Garden Bulb Onion / Green Bunch Onions (North Carolina State University Horticulture Information Leaflets)

North Carolina State University Horticulture Information Leaflets provides bulb/bunch onion gardening information including soils, fertilizer and pH, varieties, seeding, irrigation, disease/insect control, and harvesting. 

• Onion (the University of Florida, Institute of Food and Agricultural Sciences, UF/IFAS)

UF/IFAS provides onion planting information for home gardeners as well as farmers in Florida. 

• Onion (UC Davis, Vegetable Research and Information Center)

Vegetable Research and Information Center provides information about 1) onion production in California, 2) onion production costs, 3) home garden onion, 4) integrated pest management for onion, and 5) postharvest.

• Onion Family (Gardener's Network)

The Gardener's Network provides information about varieties, days to maturity, sowing, insects and pets, and diseases in growing onions. 

• Onion Q & A (Texas A&M University)

This Texas A&M University page lists frequently asked questions and answers regarding onion gardening. 

• Onion, Leek, Shallot and Garlic (Clemson University Extension Service)

Home & Garden Information Center at Clemson University offers onion gardening information including planting dates, fertilizing, watering, and so forth.  

• Onions (Cyber-North.com)

This page describes soil preparation, planting, varieties, diseases, and harvesting.  

• Onions (Home and Gardening Series of University of Arkansas Cooperative Extension Service)

University of Arkansas Cooperative Extension provides well-organized onion gardening information. The information includes 1) environment, 2) cultural practices, 3) planting time, 4) spacing and depth of planting, 5) care tips, 6) harvesting, 7) common problems such as insects and disease, and 8) frequently asked questions. 

• Onions (Mississippi State University Extension Service)

Mississippi State University Extension Service provides general information about onion and suggests onion varieties for gardening. 

• Onions, Garlic and Chives (University of Delaware Cooperative Extension)

University of Delaware Cooperative Extension Service onion page which describes the soil type for onion gardening, planting, and harvest and storage methods.  

• Onions, Garlic, and Shallots (Virginia Cooperative Extension)

Virginia Cooperative Extension Service provides general information for onion gardening. The information includes environmental preferences, culture, cultural practices, common problems, and harvesting and storage. 

• Onions-Bulb and Green Bunching (University of Hawaii at Manoa Cooperative Extension Service)

This file describes varieties, preparing the soil, fertilizer application, planting, irrigation, insect pest management, and harvest information for onion gardening.  

• Onions / Egyptian Onions Growing Guide (ExploreCornell)

This page provides information about 1) plant characteristics, 2) growing information, and 3) varieties. 

• Onions and Their Relatives (Purdue University Cooperative Extension Service)

This site provides gardening information on onions and their relatives in detail. The information includes soil preparation, planting, summer care, harvesting, and sprouting. 

• Onions in the Garden (Utah State University)

This site contains onions gardening information including recommended varieties, how to grow, common problems, and frequently asked questions. 

• Onions Gardening Guide (National Gardening Association)

- How Onions Grow- Planting Onions- Growing Onions- Harvesting Onions 

• Watch Your Garden Grow - Onion (University of Illinois Extension)

University of Illinois Extension provides onion gardening information including varieties, when to plant, spacing & depth, care, harvesting, common problems, and growing Q&A.

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