Category: Orchid Doctor

COPPER ARSENATE, CHROMATED: Problems

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Lumber treated with it for greenhouse construction etc., cause some root-tips to die on contact and its fumes discolor plastic film. A79-910 Read More

COPPER ARSENATE, CHROMATED: Used to Treat Wood Deck

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago It will harm plants only if the roots cantact it. A79-334 Read More

COPPER SULPHATE: Toxicity Reactions in Humans

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Intestinal distress and collapse. A68-583 Read More

COPPER WATER PIPES: In Greenhouse

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Are very popular; not likely to harm plants unless water supply has a high carbonic acid content. A76-1102 Read More

COPPER: Effect on Orchids

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago They are sensitive to copper; metal stakes containing copper might be toxic. A61-54They are sensitive to it; metal stakes containing it may be toxic; citrus trees in the tropics sprayed with a copp... Read More

CORK BARK SLABS: Artificial or Molded

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Used as large slabs for insulation of refrigerated rooms; can be cut up and used as mounts; the binder or adhesive is non-toxic to roots and holds up to watering; surface rough enough for root adhe... Read More

CORK BARK: Growing Medium

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Ground up into small pieces, sold as cork chips or cork nuggets, it is a satisfactory substitute for bark in some places; as slabs or mounts it accomodates many species of epidendrums, oncidiums, s... Read More

CORK BARK: What Orchids Grow on It?

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Many epidendrums, oncidiums, small dendrobiums, and cattleyas will grow on cork slabs; ground cork pieces, if medium bark sized, can be used instead of bark but they hold less moisture than fir bar... Read More

CORK BITS: As Potting Medium

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Fertilizers that might be appropriate for this would likely be balanced ones (20-20-20) because cork is relatively inert and does not tie up nitrogen like bark does. A85-866It is normally slow to d... Read More

ACID OR ALKALINE: Changing the Values

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Various means can be used: tufa, a limestone form, can be added to paphiopedilums from limestone cliffs; bark composts acidify with age; peatmoss, pine needles, oak leaves in the mix produce acidit... Read More