PH OF WATER: Adjusting with Vinegar

Culture Orchid Doctor

by Robert M. [Bert] Hamilton (Compiler)

Originally published in The Orchid Doctor in 1980 and 1988

Posted by Sys Admin over 3 years ago.

Article Blog   Article Index
Do not use vinegar to adjust the pH if it is too high; not recommended because acetates can be toxic to plants. A78-13
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: 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: Citric Acid Used 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 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. Darrin Duling asked question unknown Oncidium intergeneric in category General Discussion
  2. Darrin Duling asked question need id on oncidium intergeneric in category General Discussion
  3. Darrin Duling asked question test in category General Discussion
  4. Kate McMillan started topic Horticultural Charcoal vs Activated Charcoal in category General Discussion
  5. Susan smith asked question Vanda Samsri Gory in category General Discussion

New Comments

  1. Darrin Duling commented on topic "test" by Darrin Duling
  2. Melvin Waki commented on member plant Coel. rochussenii 'Waki' by Melvin Waki
  3. Mo Chen commented on member plant Den. longicornu by Mo Chen
  4. Yahoo Alex commented on member plant Habenaria Tanager by David Nickerson
  5. Adam Almeida commented on member plant Chz. Hsinying Pink Doll 'Hsinying' by Melvin Waki
  6. Alex Maximiano commented on member plant V. Boschii by Adam Almeida
  7. Carol Holdren commented on member plant Ar. graminifolia by Adam Almeida
  8. Melvin Waki commented on member plant Pol. neobenthamia by Adam Almeida
  9. Melvin Waki commented on member plant Hwra. Lava Burst by Jeanne M Uzar
  10. Carol Holdren commented on member plant V. Nopporn White Diamond by Adam Almeida
  11. Melvin Waki commented on member plant V. Yip Sum Wah 'Flame' by Tanya Lam
  12. Tanya Lam commented on member plant Gra. stapeliiflora 'Waki' by Melvin Waki
  13. Gustavo Sánchez commented on orchid Lc. Blue Rose
  14. Carol Holdren commented on member plant Aerdv. Somsri Sunlight by Mary Lane
  15. Tanya Lam commented on member plant Cym. finlaysonianum by Tanya Lam
  16. Alex Maximiano commented on member plant Lc. Dinard 'Blue Heaven' by Melvin Waki
  17. Carol Holdren commented on member plant Rth. Yellow Bouquet 'Pam' by Melvin Waki
  18. Carol Holdren commented on member plant V. falcata var. Hisui by Tanya Lam
  19. David Nickerson commented on member plant Ctsm. Edgardo A. Pauneto 'Dark Stripes' by David Nickerson
  20. Carol Holdren commented on member plant Phal. violacea var. indigo 'Royal Blue' by Vickie Seibert