The Orchid Doctor Articles under the Heading Perlite

Perlite Comments
PERLITE: Aggregate Additive to potting mixes: white, light product of volcanic origin; inert, holds water, does not decay; keeps medium open; use agricultural grade. OD77-4; RMH 0
PERLITE: As a Culture Medium Coarse perlite alone with a half-inch topping of pea-gravel makes for a healthy root system on a cattleya with normal watering and feeding;a test of two parallel sets of phalaenopsis plants, one in bark and one in perlite, showed superior growth in one month in perlite; a fertilizer with all trace or growth elements is essential. A81-1321; A83-806; 1304 0
PERLITE: As Potting Medium Screen out the fines through a window-screen mesh; place some drainage in the bottom of the pot; position the plant then pour in the Perlite to within an inch of the pot top then cover with half an inch of pea gravel so it won1t wash out; trace elements must be supplied in the fertilizer. Ca8lMar-9Use only the coarse grade and sift out the fines; start with 20 litres of it, add 2 litres of German peat moss, sieved fine, to make it look like Canadian peat moss, add also one cup of superphosphate, one cup of dolomite lime and one cup of hoof and horn meal, not so easy to obtain these days; when potting, top off with pea gravel; recycle old perlite at new repotting time because it contains micro-organisms which revitalize the new mix. AU88-17; Ca81Mar-9 0
PERLITE: As Potting Mix A processed volcanic material, sized, but best for orchids over one-eighth inch in size; inert; inorganic; requires a balanced fertilizer such as 20-20-20 if used alone; mainly used as an ingredient, is easy to work with, easy to obtain, does not break down, and a bundle can be bought for ten bucks. A86-499 0
PERLITE: Composition It is a calcined mixture of, principally, gypsum (Calcium sulphate) and white clay, with small amounts of other materials all heated to very high temperatures to cause incipient fusion and causing the gypsum to decompose, releasing gas to expand the mix. AU80-24 0
PERLITE: Opinions of the Experts Some use up to 50% in cynbidium mixes and get excellent results; the horticultural grade #3, is coarse and stimulates root development; several growers believe it retains too much moisture at the bottom of the pot. OA82-5; 392 0

New Topics

  1. Nancy Shapiro asked question Where did you find this type of orchid pot? in category General Discussion
  2. Charles H Wood asked question Orchids wanted St.Croix usvi in category General Discussion
  3. William Gorski asked question Is this a species or Primary Hybrid? in category General Discussion
  4. Therese Stecher asked question Banrot 40WP in category General Discussion
  5. Chen Jimmy asked question How to determine the species composition´╝č in category General Discussion

New Comments

  1. Carol Holdren commented on topic "What is the culture for Cattliante Chongkolnee" by Mike Minney
  2. Dianne Mayne commented on topic "Banrot 40WP" by Therese Stecher
  3. Linda Thorne commented on member plant Paphiopedilum Munchkin Mopsi Aru by Linda Thorne
  4. Carol Holdren commented on topic "Orchids wanted St.Croix usvi" by Charles H Wood
  5. William Gorski commented on topic "Is this a species or Primary Hybrid?" by William Gorski
  6. Henry Shaw commented on member plant Coel. Jannine Banks 'Snow White' by Henry Shaw
  7. Carol Holdren commented on topic "Trichocentrum luridum" by Danny Lyon
  8. Carol Holdren commented on topic "How to determine the species composition´╝č" by Chen Jimmy
  9. Lois Lane commented on member plant Ctna. Why Not by Alex Maximiano
  10. Carol Holdren commented on topic "SSPECIES OF ORCHID" by JENNIFER CHARMAN