CHARCOAL: For Vandas

Culture Orchid Doctor

by Robert M. [Bert] Hamilton (Compiler)

Originally published in The Orchid Doctor in 1980 and 1988

Posted by Sys Admin about 5 years ago.

Article Blog   Article Index
If entire mix is charcoal, supply all the trace elements; be sure to leach periodically. A78-1124
Share on Social Media:  
Log in to Add a Comment

More The Orchid Doctor Articles under the Heading Charcoal

Charcoal Comments
CHARCOAL: Activated to Adsorb Ethylene Pulverized charcoal activated by baking for two hours at 400 deg. and then hung in the greenhouse was claimed successful; activated monthly. A76-817; it definitely will not remove it by itself; air must be reduced in humidity to less than 5% before passing it through carbon; the cost is high. A80-513 0
CHARCOAL: Additive to Potting Mixes It does not "contain" much of anything except Cftrbon, it is used to "buffer" the compost to stop buildup of fertilizer or excess salts; the right type from a charcoal kiln must be used, whatever that is; it is praised for "sweetening" the mix for the Odontoglossum complex. OA81-153 0
CHARCOAL: As Drainage It is no better than broken crocks, crushed rock, coarse gravel, etc.,; may be reused after soaking in 10% solution of Clorox for 15 minutes or more or heating it in the oven at 250 deg.F. for 20 to 30 minutes. P70(4)19 0
CHARCOAL: As Potting Drainage After one year's use the plants went back; it seems to filter out and retain harmful matter in the mix. AU79-199When used for "crock" it seemed to absorb fertilizer salts and soon became toxic to bottom roots. A64-307. 0
CHARCOAL: As Potting Medium Because cellulose and lignin have been burned out in its manufacture it will last much longer than bark; suitable fertilizers are 18-18-18 or 20-20-20 at Itpg. A82-487Current use in U.S.A.; needs twice as much watering as bark because it does not absorb water, it adsorbs it and builds up layers of condensed liquids; never used alone, it provides no nutrients, requires a balanced fertilizer; used most as an additive to bark and other mixes. A86-496In Hawaii comparison test of growing charcoal against hapuu and fir bark proved charcoal superior; 3,000 to 4,000 plants were used, sized from 1/2 inch to 1 inch; after use, soak overnight in fungicide and reuse; Hyponex 20-20-20 recommended as fertilizer. NH74(1)12+It is fertilized with a balanced fertilizer with a 1-1-1 ratio, otherwise standard cultural practice apply. A84-1180It is used in terrarium mixes to "sweeten" the soil to keep roots healthy; the mix is kept open for better aeration; it allows only some algae to develop and appar... 0
CHARCOAL BRIQUETTES: Do Not Use They are made with materials that can be harmful if used in potting mixes. F77-115 0
CHARCOAL CHIPS: As Potting Medium In Hawaii, all vandaceous orchids grown in straight charcoal chips; fewer problems encountered from bacterial and fungal pests, A76-227 0
CHARCOAL: Graded Hardwood Type Is available in four grades; advt. A84-1084 0
CHARCOAL: In Culture Media Has a positive effect on the growth of cymbidium plantlets in the flask, also phalaenopsis and paphiopedilums because it seems to improve aeration. A84-258It seems to improve aeration; for other details refer to OBIII-258 0
CHARCOAL: In Cymbidium Mix Has many good qualities to recomend it; used in many parts of the world; one questionable point is its filtering effect whereby modern insecticides and fungicides added to the mix may be adsorbed and rendered less effective. C73-130 0
CHARCOAL: In Potting Mix Many growers add about 10% of the fine grade in a mix. Van.O.S. Bull.Dec.-87 0
CHARCOAL: Potting Medium Oak charcoal with a pH of 6.5 to 7.5 has the least effect on the pH of the mix; adsorbs cyclic organic compounds; is safe for plants but its main advantage is physical support. A81-1311 0
CHARCOAL: Properties Investigation of cationic exchange capacity; retention of nutrients; bacterial activity; high water holding capacity; and a high bacteria activity; feed organic type fertilizers to it; lasts forever. AU73-181+; pros and cons. A80-739 0
CHARCOAL: Supermarket Type Is Useful But not if it is processed into briquettes which have a petroleum binder. A75-876 0
CHARCOAL: Used in Potting Mixes It is popular in England and S.E.Asia; comprises 15 to 30% of the mix in England. A79-584 0

New Topics

  1. Judith Pariseau asked question Paphiopedilum culture differences in category Paph Alliance
  2. Marc Lefkowitz asked question Bulbophyllum in category Bulbophyllums
  3. Tony Borowiecki asked question Can a Bealleara re-flower in category Oncidium Alliance
  4. Tony Borowiecki asked question Re-flowering Orchids in category Dendrobiums
  5. Sylvia Spence asked question How to care for my new orchid in category General Discussion

New Comments

  1. Robert H. Findlay commented on member plant Oncidium Sherry Baby by Luesa Estrada
  2. Judy Bailey commented on topic "Paphiopedilum culture differences " by Judith Pariseau
  3. David Hickman commented on topic "Mystery Orchid" by David Hickman
  4. Carol Holdren commented on topic "Bulbophyllum " by Marc Lefkowitz
  5. Carol Holdren commented on topic "Can a Bealleara re-flower" by Tony Borowiecki
  6. Carol Holdren commented on topic "How to care for my new orchid" by Sylvia Spence
  7. Bodil Bruus commented on member plant Ctt. Mrs. W. N. Elkins var. coerulea by Linda Thorne
  8. Jan E Teitsworth commented on topic "Can anyone identify this orchid?" by Jan E Teitsworth
  9. Carol Holdren commented on topic "Brassolaeliocattleyamaianh " by Kim Loan T Nguyen
  10. David garcia commented on member plant Myrmecophilia tibicinis stromburgkia trumpet player by David garcia
  11. Carol Holdren commented on member plant Bc. Maikai by William Gorski
  12. Joe L commented on topic "ID of this Oncidium? " by Joe L
  13. Robert H. Findlay commented on member plant Sngl. macloughlinii by Nicholas Stein
  14. Carol Holdren commented on topic "Name of this orchid" by ETHEL HAY
  15. Carol Holdren commented on topic "Pot. Hawaiian prominence america red orchid" by Paula Milano
  16. Edward Zapata commented on topic "Lady Bug or dangerous bug" by John Small
  17. Wyatt Parker commented on member plant Zygopetalum var. Big Red One by Wyatt Parker
  18. Carol Holdren commented on member plant Renantanda Sunrise 'Prasongs' by Andrew Chan
  19. Carol Holdren commented on topic "Dendrobium No I’d. HELP!" by Rae Walker
  20. Carol Holdren commented on article "CATTLEYAS: Control of Blooming Time" by Robert M. [Bert] Hamilton (Compiler)