PH OF WATER: Citric Acid Used

Culture Orchid Doctor

by Robert M. [Bert] Hamilton (Compiler)

Originally published in The Orchid Doctor in 1980 and 1988

Posted by Sys Admin over 5 years ago.

Article Blog   Article Index
Local water supply was highly alkaline, pH of 10.5, and was lowered to 5.5 twice weekly using a Hydromix proportioning unit; a drop or two of food coloring was also added. A72-1003
Share on Social Media:  
Log in to Add a Comment

More The Orchid Doctor Articles under the Heading PH of Water

PH of Water Comments
PH METERS: Electronic Type How do they work? -- place a small amount of potting bark or tree fern in water enough to moisten the medium and the electrode or probe and test. A81-688 0
PH OF WATER: Acidifying Small Quantities Use phosphoric acid in a sink full of water, adding it drop by drop until the desired and tested-for acidity is reached and before pots with plants are immersed in it. A57-417; use citric acid. A73-917 0
PH OF WATER: Adjusting Ph When Too High Use dilute sulphuric acid or dilute orthophosphoric acid. A68-719; A78-13 0
PH OF WATER: Adjusting with Vinegar Do not use vinegar to adjust the pH if it is too high; not recommended because acetates can be toxic to plants. A78-13 0
PH OF WATER: Adjustment of Salty Tap Water Phosphoric acid used to adjust slightly alkaline pH of 7.5 to acid pH of 5.5 to 6.0, thereby increasing the solubility of tap water to sodium chloride, to prevent crystallization on roots, etc.; accumulation of salts arrested. A73-53; A75-54 0
PH OF WATER: Appropriate Water can have a pH reading of from 4 to 9; the water of Gainsville FL is close to 8.5 and has been used at the University of Florida without serious problems since Ponce de Leon. A85-471 0
PH OF WATER: Cymbidiums The best pH for them is not so much a matter of pH as to make sure the water is low in salt content. A70-725Their requirement is around 7.0. A78-713 0
PH OF WATER: How to Raise It To raise the pH cf your water supply above 5.0 it is receommended to use sodium hydroxide as the basic solution. A88-35 0
PH OF WATER: Its Effect on Orchids A pH of 5 or lower is satisfactory for watering if the sodium and calcium content are not too high; the facts can be found out from your city authorities; a laboratory analysis will determine if your supply is satisfactory. A82-804 0
PH OF WATER: Recommended A satisfactory analysis for Somerville,N.J. is a pH of 7.2; it has a water supply like most of N.J.; some supplies are high in soluble salts; 8.4 in North Brunswick,N.J. is good despite the high pH reading. A71-715 0
PH OF WATER: Satisfactory Range 7 is recommended A78-309; other pH possibilities are: 8.0 to 8.4 is completely satisfactory; 7.2 or 8.4 should not be tampered with, depending on the locality; between 5.0 and 5.6 (medium strong acidity) gives excellent results also; references cited. A73-916 0
PH OF WATER: Softeners De-ionization produces excellent water for orchids; salt, or ion, displacement does not; chemical supply houses sell small laboratory de-ionization or de-mineralizer units. A80-4 0
PH OF WATER: Sulphuric Acid Used to Reduce Ph to 5.6 The long range effects are none if pots are leached with every watering; orchids tolerate good amounts of sulfates. A75-500 0
PH OF WATER: Testing Litmus paper used to determine pH is unsatisfactory because color variations are too subtle to be determined; use a colormetric method where drops of Brom Creosol Purple are added to water to get a color reading. A73-55; OD65-120 0
PH OF WATER: Tree Habitats Rain water has a low pH; activity of fungi, bacteria, lichens, algae etc. on bark, plus leaf leaching produce an acid state through production of organic acids; fungi normally like a pH of 4.5 to 6.5, and possibly produce organic nutrients as amino acids and vitamins. F68-112 0
PH OF WATER: Well-water If it has a pH of 5 and contains 105ppm. of calcium it is a suitable pH and is not excessive in calcium. A78-812; A80-739 0

New Topics

  1. Angela Baxter started topic Catt. walkeriana in category Cattleya Alliance
  2. Luis Imatani asked question RLC/ LC Large flowered hybrids in category General Discussion
  3. Bill Overton asked question Phrag. Panther Run in category General Discussion
  4. William Gorski asked question Orchid Species: Vanda falcata h.v. Ryunotsume in category Species
  5. Stefan Neher asked question Stale Data in category Site Navigation

New Comments

  1. Bill Overton commented on topic "Catt. walkeriana" by Angela Baxter
  2. Gonzalo Rotondaro commented on member plant Cattleya (Sophronitis) cerna by Laura Urban
  3. Steven Kirincich commented on member plant Lc. Little Oliver by Steven Kirincich
  4. Robert Rand commented on member plant Alcra. Winter Wonderland 'White Fairy' by Robert Rand
  5. Thuong Do commented on member plant Schom. tibicinis by Edward Zapata
  6. Bill Overton commented on topic "diseases" by Penny Edwards
  7. William Gorski commented on topic "Orchid Species: Vanda falcata h.v. Ryunotsume" by William Gorski
  8. Stefan Neher commented on topic "Stale Data" by Stefan Neher
  9. Susan Fairbairn commented on topic "diseases" by Penny Edwards
  10. Robert H. Findlay commented on topic "seed vs. pollen parent " by Robert H. Findlay
  11. Carol Holdren commented on topic "Photo of MaryAnn Coyle or Laura Ann Coyle" by Dana Coyle
  12. Mary Lane commented on member plant Dendrobium QT Makani by Mary Lane
  13. Brandy France commented on member plant Chz. Hsinying Pink Doll 'Hsinyijng' by Adam Almeida
  14. Roberto Lizama commented on topic "Help to ID" by Roberto Lizama
  15. Carol Holdren commented on topic "Brsdm GILDED URCHIN ONTARIO ORCHID" by Diana King
  16. Carol Holdren commented on topic "Compact DEN SUPERBUM ORCHID MINEATURE " by Diana King
  17. Pam Lipscomb commented on member plant Blc. Oconee 'Mendenhall' by Jeanne M Uzar
  18. Carol Holdren commented on topic "Don't we meet in person in Kalamazoo, MI anymore?" by Conni Wireman
  19. Catherine Chance commented on topic "Searching for Erycina echinata " by Catherine Chance
  20. Carol Holdren commented on member plant Gom. Jiaho Queen 'Jiaho' by Robert Rand