LIME: In Bark Media

Culture Orchid Doctor

by Robert M. [Bert] Hamilton (Compiler)

Originally published in The Orchid Doctor in 1980 and 1988

Posted by Sys Admin almost 4 years ago.

Article Blog   Article Index
Lack of it in bark leads to greater acidity in the mix; it is a common almost universal practice (1) to add lime to bark potting mixes; can be added as dolomite to the surface of the pot mix, or ground oyster shell or hydrated lime. OA87-205
Share on Social Media:  
Log in to Add a Comment

More The Orchid Doctor Articles under the Heading Lime

Lime Comments
LIME: Added to Potting Mix To get the potting mix to 6pH add approximately 20 lbs. of lime per cu.yd. of bark; use dolomite lime or oyster shell flour, or even better, half-and-half of each. A071-29 0
LIME: Application to Plants A common mineral deficiency is calcium which is usually lacking in commercial fertilizers; it is sometimes supplied by means of limestone or dolomite, whose usual alkalinity is partially offset in the potting mix by acidic components like redwood; gypsum is a possible means to a solution if lime is lacking. OIE85Jy-13 0
LIME: Dolomite, Its Characteristics A mined, fossil-like form contains both calcium carbonate and magnesium; it adjusts the pH of bark; usually added with oyster shell because the two are better than one alone; beneficial in areas where the water is high in sodium. C74-51It does not react as fast as hydrated lime; it contains magnesium. A61-735 0
LIME: Oyster Shell, Its Characteristics It is calcium carbonate lime; ground up shells comes in coarse type for chicken scratch or flour type used by many orchid growers. C74-51 0
LIME: Pointers About it Composted fertilizers never contain it; it is always added to peat mixes in order to supply missing calcium; Rockwool and Oasis have no buffering ability for lime; the deficit of Calcium is revealed in weak leaves, easily broken spikes, discoloration of flowers; calcium develops firm cell walls. OA87-201 0
LIME WATER: Recipe One tsp. of hydrated lime is dissolved in a gallon of water; may be used to adjust the pH of potting media, upwards. A79-898; 1/2 tsp. limestone per 6 inch pot raises pH 5.0 up. A80-739 0

New Topics

  1. Sandi Block-Brezner asked question Brassocattleya hybrid? in category General Discussion
  2. Dean Haas asked question Parentage of RLC Memoria Emma Chen in category General Discussion
  3. John Small asked question Orchid bulb? in category General Discussion
  4. John Small asked question What is this? in category General Discussion
  5. Marilynn Davis asked question Phal. Violacea in category General Discussion

New Comments

  1. Sharie Heckaman commented on member plant Bsn. Maikai var. Louise by Sandi Block-Brezner
  2. Dean Haas commented on article "Have Local Orchids to Sell or Trade?" by Sys Admin
  3. Robert H. Findlay commented on member plant B. nodosa by John Small
  4. Eileen Pryor commented on member plant Den. chrysotoxum by Tom Kuligowski
  5. Gustavo da Silva commented on member plant Max. callichroma by Gustavo da Silva
  6. Peter Goodin commented on topic "What is this?" by John Small
  7. Sharie Heckaman commented on topic "Paph. tag Identification" by William Gorski
  8. Robert H. Findlay commented on topic "Unmatched Oncidium Alliance Orchid" by Colin Campbell
  9. Jim Williams commented on topic "Arranges Elro" by Khanh tran
  10. Carol Holdren commented on topic "sideways images" by Robert H. Findlay
  11. John Small commented on topic "Which is correct?" by John Small
  12. Mo Chen commented on member plant Holc. kimballianum by Mo Chen
  13. Fran Fassman commented on orchid E. Thomas Fennell
  14. Lauren Hutchison commented on member plant Oip. Celtic Sun 'Maya' by Dex W
  15. Lauren Hutchison commented on member plant Phalaenopsis Tristar by Lauren Hutchison
  16. Lauren Hutchison commented on member plant Phal. OX Golden Apple 'Honeycrisp' by William Gorski
  17. Debbie Chase commented on topic "Help to Identify Orchid " by Debbie Chase
  18. Tien Pham commented on member plant V. Yip Sum Wah 'Flame' by Tanya Lam
  19. Carol Holdren commented on topic "Can someone give me the name of this orchid?" by Jean Seymour
  20. Carol Holdren commented on member plant Spathoglotis plicata (Ground Orchid) by Frances LaVigne