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 over 7 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. Mary Lane asked question Orchid roots .com site? in category General Discussion
  2. David George asked question recently purchased orchid shows unstoppable roots in category General Discussion
  3. katherine mott asked question shorter stem with less vigorous blooms in category Phalaenopsis
  4. Glenda Ratliff started topic need info on yellow bird in category General Discussion
  5. Paula Milano asked question Looking to join an orchid club. in category General Discussion

New Comments

  1. Carol Holdren commented on topic "recently purchased orchid shows unstoppable roots " by David George
  2. Michael Makio commented on orchid V. Beatrice Makio
  3. Carol Holdren commented on topic "shorter stem with less vigorous blooms" by katherine mott
  4. Carol Holdren commented on topic "need info on yellow bird" by Glenda Ratliff
  5. Carol Holdren commented on topic "Looking to join an orchid club." by Paula Milano
  6. Jeanne Uzar Hudson commented on topic "Repotting Large Cattleyas" by Jeanne Uzar Hudson
  7. Jeanne Uzar Hudson commented on member plant Paph. malipoense by Jeanne Uzar Hudson
  8. William Gorski commented on topic "how difficult is it growing from seed" by kevan gregory
  9. Carol Holdren commented on topic "Information " by Carmen Britton
  10. Carol Holdren commented on member plant C. lueddemanniana var. Coerulea, Venosa by Paulo Fiuza
  11. Jeanne Uzar Hudson commented on topic "Banrot 40WP" by Therese Stecher
  12. Maria Lucia Prieto Real commented on orchid Rlc. Village Chief Armani
  13. Mariana Chacon commented on orchid Gom. Jiaho Queen
  14. Roberto Lizama commented on member plant Max. dillonii by Roberto Lizama
  15. Nancy Speedy commented on scheduled event "2024 Orchid show Martin County "Ocean of Orchids"" by Martin County Orchid Society
  16. Jeanne Uzar Hudson commented on member plant Paph. Fanaticum by Jeanne Uzar Hudson
  17. R .Benson commented on member plant Den. Tianmu Green Elf 'Sweetheart' by R .Benson
  18. Alice Walker commented on article "Oeniella polystachys" by Tom Kuligowski
  19. Kathryn Kersey commented on scheduled event "Boca Raton Orchid Society Show & Sale" by Boca Raton Orchid Society
  20. BJ Lough commented on member plant Asctm. miniatum by BJ Lough