Category: Culture

WATER, HARD: Devices Available for Removing the Cause

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago There is no simple device for removing calcium and magnesium from tap water; water-softeners create water unsuitable for orchids; demineralization units are expensive; paphiopedilums grow in limest... Read More

WATER, HARD: High in Calcium and Magnesium Salts

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Its nature and characteristics and suitability for growing; has high electrical conductance; comments on water-softeners; refer to A67-466+; AH39 Read More

WATER, HARD: Near Maximum "hardness Index"

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago If the water coats pots and plants with lime residue, perhaps rain water should be collected for periodical use; demineralizer units are expensive but laboratory models are more moderate; address g... Read More

WATER, HARD: Softened with Soda Ash

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Do not use this on plants. A67-466; A78-812 Read More

WATER, HARD: With Activated Charcoal to Remove Calcium

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago It will not work; only certain types of organic compounds are filtered out; units for doing the job properly are not cheap; best bet is to catch rainwater. A74-433 Read More

WATER SOFTENERS: Using "common Salt"

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago The main factor not fully considered in transforming a healthy collection of cymbidiums to a dying one was the fact that common salt was used as a water softener; refer to OR77-37+ -- water from a ... Read More

WATERING (GENERAL): First Lightly Then Heavily

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago The first watering is to wet the medium and the second is to leach out the residual alkali. OD72-227 Read More

WATERING (GENERAL): First Water Then Fertilize

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Dry roots do not like fertilizer. A69-524; A74-114 Read More

WATERING (GENERAL): Postulates

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Watering is to be done only when the root tip is actively growing and maintaining the green section at the tip at its optimum length. OD68-304 Read More

WATERING (GENERAL): Problems

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago They are of common occurrence; the variety of kinds grown requires variety of treatment; pots and mixes vary greatly also; excessive watering the main problem; too often oxygen content of water and... Read More