Orchid Culture - Watering, Water Quality and Fertilizer

Water Quality and Fertilizer for Orchids
Understanding pH Management and Plant Nutrition

pH Management and Plant Nutrition

Bill Argo, Blackmore Co., Journal of the International Phalaenopsis Alliance Part 1 Intro
Part 2 Water Quality
Part 3 Fertilizers
Part 4 Substrates
Part 5 Choosing the Best Fertilizers
Water Quality and Fertilizer for Orchids

Water Quality

Choose Your Fertilizer Based on Water Quality, Sue Bottom, SAOS
Soluble Salts, Sue Bottom, SAOS What's New
Rain Collection Solution, Linda Stewart, SAOS What's New
Reverse Osmosis Water, James Arnold, JOS What's New
Are pH Checks Necessary, Harry McElroy, SAOS
Citric Acid for High Alkalinity Waters, Sue Bottom
Alkaline Well Water and Fertilizer, Sue Bottom, SAOS
Water Quality and Fertilizer for Orchids
Cymbidium Growing Tips by Harry McElroy

Plant Nutrition and Supplements

Calcium and Magnesium, Sue Bottom, SAOS
Calcium Deficiency in Cattleyas, Sue Bottom
Magnesium or Phosphorus Promote Flowering? Dr. Yin-Tung Wang
Orchid Supplement... Or Snake Oil?, Sue Bottom, SAOS
Orchid Myths - Foliar Feeding, Sue Bottom, SAOS
Michigan State University Type Fertilizer

Peters Complete Guide to Fertilizer Selection

You can download a selection guide with lots of detailed information about their fertilizer. Consider adding supplemental magnesium in the form of Epsom salts with your fertilizer.
- For low to moderate alkalinity water or if you grow in a highly organic mix like bark or coconut, use a Cal Mag fertilizer (like Peters 17-3-17 Peat Lite Neutral Cal Mag or 15-5-15 Cal Mag fertilizer).
- For high alkalinity water from our shallow wells, use an acid generating fertilizer and Epsom salts (like 20-20-20 or 20-10-20 available from retail outlets; or Peters Excel 21-5-20 Multi Purpose from horticultural sources; Peters 18-8-17 Peat Lite High Mag Special would be ideal but is not available in Florida.)