The Orchid Doctor Articles under the Heading Calcium

Calcium Comments
CALCIUM BUILD-UP: On Leaves It provides protection from hot sunshine in California. OD68-197 0
CALCIUM CARBONATE (CACO3): Used in Mixes In paphiopedilum mixes it is used as an additive in various forms: chalk, limestone, marble, magnesium limestone, gypsum, coral, shells of molluscs, etc. A75-712 0
CALCIUM: Characteristics An essential element; removes certain organic acids; is part of cell wall construction. OA78-51 0
CALCIUM CHLORIDE, ANHYDROUS: Used for Storing Pollen and Seed Is sold by scientific supply houses; place a layer of it about 1/2 to three-quarters of an inch in the bottom of a Mason jar; cover with 1/2 inch layer of cotton before placing seed. A67-45 0
CALCIUM: Contributes to Drainage In the presence of calcium particles in the media flocculate or come together; in the presence of organic matter, aggregates are formed and drainage is thereby achieved. OD71-278 0
CALCIUM: Deficiency Black areas appear on cattleyas during hot weather but they are not likely caused by sunburn although the symptoms are similar; deficiency symptoms are most prevalent when cattleyas are in active growth and new leads are maturing; add a little lime to the top of the potting medium: a level teaspoon to a 6inch pot is ample. F83-54It causes young leaves to turn black at the tip, then spreads downward, preceded by ye1low "halo" or margin; apply lime to the top of the mix in the pot. AH86-101; F87-58 0
CALCIUM: Functions as Fertilizer Occurs in plants as calcium pectate; cements cells together; moves various compounds within the plant; enhances root development; is relatively immobile so a continuous supply is necessary. AU75-47 0
CALCIUM: Supplying a Necessary Element Calcium hydroxide is the most suitable source, at 50 to 200 ppm., or one gram of Hydrated lime to 10 litres of water, or 2.25 grams per 5 gallons of water; refer to AU84-97 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. John Small commented on member plant B. nodosa ''H&R' 4N x 'Mas Mejor'' by John Small
  2. Robert H. Findlay commented on topic "Parentage of RLC Memoria Emma Chen" by Dean Haas
  3. Sandi Block-Brezner commented on member plant Bsn. Maikai var. Louise by Sandi Block-Brezner
  4. Dean Haas commented on article "Have Local Orchids to Sell or Trade?" by Sys Admin
  5. Eileen Pryor commented on member plant Den. chrysotoxum by Tom Kuligowski
  6. Gustavo da Silva commented on member plant Max. callichroma by Gustavo da Silva
  7. Peter Goodin commented on topic "What is this?" by John Small
  8. Sharie Heckaman commented on topic "Paph. tag Identification" by William Gorski
  9. Robert H. Findlay commented on topic "Unmatched Oncidium Alliance Orchid" by Colin Campbell
  10. Jim Williams commented on topic "Arranges Elro" by Khanh tran