The Queensland Gardening Pages

The following are for general information. Commercial products, regulations, plants and soil types, etc. vary from place to place (see notes above).

Fertilizer Industry Federation of Australia includes information sheets and conference papers

Soil Fertility and Fertilizers Missouri Botanical Garden

Soil nutrient testing: how to get meaningful results Dept Primary Industries & Fisheries, Queensland

Nutrition - Other nutrients (PKZnSCuFe) Dept Primary Industries & Fisheries, Queensland

Nutrient deficiency symptoms of plants Department of Primary Industries, Victoria

Citrus nutrition State of New South Wales, Department of Primary Industries (descriptions of ferilisers)

Identifying nutritional deficiencies in the home garden Department of Agriculture Western Australia

Recognizing Plant Nutrient Deficiencies University of Nevada Cooperative Extension (PDF)

Nutrient News Good overview of the important plant nutrients. University of Missouri

Nutrients California Polytechnic State University

How to Stimulate Root Growth of Garden & Landscape Plants Arid-Southwestern Gardening Information, University of Arizona

Organic Fertilizers Work Well in Warm Weather Arid-Southwestern Gardening Information, University of Arizona

Organic vs. Commercial Fertilizers Colorado State University

Chemical versus organic fertilizers? Extension Service Garden Hints, Oregon State University

When and How to Use Foliar Fertilizers Yard and Garden News, University of Minnesota

The Myth of Foliar Feeding Washington State University (PDF)

Foliar Fertilization Appropriate Technology Transfer for Rural Areas, USA

Fertilizers for Trees and Shrubs University of Hawaii at Manoa, USA

Fertilizing Woody Ornamentals Extension Horticulture Information Resource Texas A&M University

Fertilizing Landscape Plants Ohio State University

Nitrogen Form Affects Foliage Plant Growth University of Florida, USA

Fertilising native plants Department of Natural Resources and Mines, Queensland (PDF)

Phosphorus and Iron Nutrition in Australian Native Plants Association of Societies for Growing Australian Plants

Phosphorus Needs of Some Australian Plants Association of Societies for Growing Australian Plants

Phosphorus toxicity in native and proteaceous plants Department of Primary Industries, Victoria

Using Fertilisers in the Native Garden Association of Societies for Growing Australian Plants

Native Plants and Phosphate Association of Societies for Growing Australian Plants

Mycorrhizas Australian National Botanic Gardens

Potash & Phosphate Institute / Potash & Phosphate Institute of Canada North Anmerica

The Myth of Phosphate Fertilizer Washington State University (PDF)

The Myth of Phosphate, Part II Washington State University (PDF)

Potassium in Agriculture Canpotex Potassium Development program in Australia & New Zealand

Potash & Phosphate Institute / Potash & Phosphate Institute of Canada North Anmerica

Removing Potassium-deficient Leaves Accelerates Rate of Decline in Pygmy Date Palms (Phoenix roebelenii) TropicLine, University of Florida, USA

The Myth of Mineral Magic Washington State University (PDF)

Phosphorus and Iron Nutrition in Australian Native Plants Association of Societies for Growing Australian Plants

Iron Chlorosis of Trees and Shrubs NebGuide from University of Nebraska, USA

Iron Chlorosis Symptoms and Solutions University of Illinois

Keep Your Plants Pumping Iron Yard and Garden News, University of Minnesota

Control of iron chlorosis in ornamental and crop plants Utah State University Extension (PDF)

Iron Chlorosis Colorado State University Extension

Iron Chlorosis Ohio State University

Straight Talk About Iron Deficiency and Plants Texas

Magnesium Deficiency Becoming More Common This article is about grapevines in California, but has some interesting information about magnesium deficiencies, causes and remedies

Magnesium deficiency Royal Horticultural Society, UK

Epsom Salts Washington State University (PDF)

Epsom salts - miracle, myth…or marketing Washington State University (PDF)

Epsom Salt Council This website includes tips on using Epsom salts in the garden

The Myth of Mineral Magic Washington State University (PDF)

Effect of Manganese Source on Manganese Uptake by Pygmy Date Palms (Phoenix roebelenii) TropicLine, University of Florida, USA

Tip for Greenhouse Growers: Add Silicon Silicon may be be important to the health of some plants, but is low in soil-less growing media. USDA Agricultural Research service

Differential Responses of Container-grown Ornamental Foliage Plants to Silicon Application Scroll further down the page to view the abstracts "Beneficial Effects of Silicon on Container-Grown Ornamental Plants" and "Silicon as a Beneficial Element for Tropical Foliage Plant Growth" University of Florida