WATER, HARD: De-ionized Water for Plants

Culture Orchid Doctor

by Robert M. [Bert] Hamilton (Compiler)

Originally published in The Orchid Doctor in 1980 and 1988

Posted by Sys Admin almost 5 years ago.

Article Blog   Article Index
For a few small plants one can buy the kind of water sold for steam irons in areas where the local water has a high sodium content. OD79-53
Share on Social Media:  
Log in to Add a Comment

More The Orchid Doctor Articles under the Heading Water, Hard

Water, Hard Comments
WATER, HARD: Causes Calcium Deposits on Cattleya Leaves The acidification of water from the hose gradually dissolves the deposits; see method described, A69-126; A71-609 0
WATER, HARD: Characteristics The critical factor is the soluble salt content; over 150 ppm. of calcium carbonate (CaCo/3) is hard, soap does not produce good lather; waters with less than 125 ppm. are excellent; up to 500 ppm. are all right; 500 to 800 are usable with caution. F80-8 0
WATER, HARD: Deposits on Tree-fern Rafts To dissolve these use a little nitric acid at pH of 4.0 to 4.5; add a few drops of dilute nitric acid to a plastic bucket of water and soak the rafts for 1/2 hour. A75-680 0
WATER, HARD: Devices Available for Removing the Cause There is no simple device for removing calcium and magnesium from tap water; water-softeners create water unsuitable for orchids; demineralization units are expensive; paphiopedilums grow in limestone soils and are not harmed by "hard" water; possible to acidify hard water with citric or nitric acids. A72-204 0
WATER, HARD: High in Calcium and Magnesium Salts Its nature and characteristics and suitability for growing; has high electrical conductance; comments on water-softeners; refer to A67-466+; AH39 0
WATER, HARD: Near Maximum "hardness Index" If the water coats pots and plants with lime residue, perhaps rain water should be collected for periodical use; demineralizer units are expensive but laboratory models are more moderate; address given. A73-709 0
WATER, HARD: Softened with Soda Ash Do not use this on plants. A67-466; A78-812 0
WATER, HARD: With Activated Charcoal to Remove Calcium It will not work; only certain types of organic compounds are filtered out; units for doing the job properly are not cheap; best bet is to catch rainwater. A74-433 0

New Topics

  1. Kim Loan T Nguyen asked question Brassolaeliocattleyamaianh in category General Discussion
  2. Paula Milano asked question Pot. Hawaiian prominence america red orchid in category General Discussion
  3. ETHEL HAY asked question Name of this orchid in category General Discussion
  4. Joe L asked question ID of this Oncidium? in category Oncidium Alliance
  5. Edward Zapata started topic Cymbidium Helen Bannerman in category General Discussion

New Comments

  1. Carol Holdren commented on topic "Brassolaeliocattleyamaianh " by Kim Loan T Nguyen
  2. David garcia commented on member plant Myrmecophilia tibicinis stromburgkia trumpet player by David garcia
  3. Carol Holdren commented on member plant Bc. Maikai by William Gorski
  4. Joe L commented on topic "ID of this Oncidium? " by Joe L
  5. Robert H. Findlay commented on member plant Sngl. macloughlinii by Nicholas Stein
  6. Carol Holdren commented on topic "Name of this orchid" by ETHEL HAY
  7. Carol Holdren commented on topic "Pot. Hawaiian prominence america red orchid" by Paula Milano
  8. Carol Holdren commented on topic "Mystery Orchid" by David Hickman
  9. Edward Zapata commented on topic "Lady Bug or dangerous bug" by John Small
  10. Wyatt Parker commented on member plant Zygopetalum var. Big Red One by Wyatt Parker
  11. Carol Holdren commented on member plant Renantanda Sunrise 'Prasongs' by Andrew Chan
  12. Carol Holdren commented on topic "Dendrobium No I’d. HELP!" by Rae Walker
  13. Carol Holdren commented on article "CATTLEYAS: Control of Blooming Time" by Robert M. [Bert] Hamilton (Compiler)
  14. Carol Holdren commented on member plant Lc. Nice Holiday 'Suntopia' by William Gorski
  15. Robert H. Findlay commented on topic "Phragmipedium Cape Sunset or Eric Young?" by Darrin Duling
  16. Robert H. Findlay commented on member plant Phrag. Ecuagenera Dream by Robert H. Findlay
  17. Tatjana Opekunova commented on article "CATTLEYAS: Reasons for Non-flowering" by Robert M. [Bert] Hamilton (Compiler)
  18. Carol Holdren commented on topic "Need ID, Please" by Oliver Quin Surco
  19. Sara D commented on member plant Phal. bellina var. Coerulea by Sara D
  20. Debbie Chase commented on topic "Identify This Orchid " by Debbie Chase