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. Kate McMillan started topic Horticultural Charcoal vs Activated Charcoal in category General Discussion
  2. Susan smith asked question Vanda Samsri Gory in category General Discussion
  3. Edward Zapata asked question Sale and trade in category General Discussion
  4. Jackie Hartter asked question Cymbidiums not blooming in category General Discussion
  5. Robert Ferguson asked question Neomorrea in category General Discussion

New Comments

  1. Gustavo Sánchez commented on orchid Lc. Blue Rose
  2. Carol Holdren commented on member plant Aerdv. Somsri Sunlight by Mary Lane
  3. Tanya Lam commented on member plant Cym. finlaysonianum by Tanya Lam
  4. Alex Maximiano commented on member plant Lc. Dinard 'Blue Heaven' by Melvin Waki
  5. Carol Holdren commented on member plant Rth. Yellow Bouquet 'Pam' by Melvin Waki
  6. Carol Holdren commented on member plant V. falcata var. Hisui by Tanya Lam
  7. David Nickerson commented on member plant Habenaria Tanager by David Nickerson
  8. David Nickerson commented on member plant Ctsm. Edgardo A. Pauneto 'Dark Stripes' by David Nickerson
  9. Carol Holdren commented on member plant Phal. violacea var. indigo 'Royal Blue' by Vickie Seibert
  10. Robert H. Findlay commented on member plant E. cordigera by Angie Carn