Category: Orchid Doctor

PH OF WATER: Satisfactory Range

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago 7 is recommended A78-309; other pH possibilities are: 8.0 to 8.4 is completely satisfactory; 7.2 or 8.4 should not be tampered with, depending on the locality; between 5.0 and 5.6 (medium strong ac... Read More

PH OF WATER: Softeners

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago De-ionization produces excellent water for orchids; salt, or ion, displacement does not; chemical supply houses sell small laboratory de-ionization or de-mineralizer units. A80-4 Read More

PH OF WATER: Sulphuric Acid Used to Reduce Ph to 5.6

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago The long range effects are none if pots are leached with every watering; orchids tolerate good amounts of sulfates. A75-500 Read More

PH OF WATER: Testing

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Litmus paper used to determine pH is unsatisfactory because color variations are too subtle to be determined; use a colormetric method where drops of Brom Creosol Purple are added to water to get a... Read More

PH OF WATER: Tree Habitats

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Rain water has a low pH; activity of fungi, bacteria, lichens, algae etc. on bark, plus leaf leaching produce an acid state through production of organic acids; fungi normally like a pH of 4.5 to 6... Read More

PH OF WATER: Well-water

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago If it has a pH of 5 and contains 105ppm. of calcium it is a suitable pH and is not excessive in calcium. A78-812; A80-739 Read More

PHAIUS GRANDIFOLIUS: A Problem Plant

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago A good potting material: use two parts of very fibrous loam, two parts leaf mold, one part well-rotted manure, and one part coarse sand. A64-407; A70-1098 Read More

PHAIUS: A Problem Plant

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago How to make it bloom: use a good soil mix with cow manure, place in good shade, set pots in saucers of water or water every two to three days; give a minimum temperature of 60 deg.F. and keep the f... Read More

PHAIUS: Broad Leaves Are Infected with Tan, Moist Lesions Which Resist Control by Both Natriphene and Physan

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Use Benlate 1 ttpg.; or Banrot at 2 ttpg. as a drench over all the plant. A76-206 Read More

PHALAENOPSIS: "zada" Crosses

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago In choosing seedlings pick the ones with green leaves, not those with the reddish-tinged leaves, if you want the darker colored flowers. ODA78(l)-24 Read More