Category: Orchid Doctor

WATER TREATMENT: By Reverse-osmosis Unit

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago A demineralizing process; a 5-gallon unit produces over 35 gallons per week; a pre-filter in the supply line will show dirt traces in a few weeks in some supplies. A84-1120; OD87-40; OIE87Jan-ll; Read More

WATER, COLD: Chills the Plants

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Tap-water in winter can be warmed with a kettle-full of hot water used to warm the water in a watering can. OR69-50 Read More

WATER, COLD: Splashing on Phalaenopsis Leaves

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Cold water causes leaf (mesophyll) collapse on the upper surface; a slightly sunken, light green pitting which is reproduced on the under surface, leading to the yellowing of the leaf. A75-498 Read More

WATER, COLD: Watering Damage to Orchids

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago There is no damage done using cold water to water plants; commercial growers no longer "temper" the water even when it is as low as 39 deg.F. A71-1021 Read More

WATER, HARD: Causes Calcium Deposits on Cattleya Leaves

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago The acidification of water from the hose gradually dissolves the deposits; see method described, A69-126; A71-609 Read More

WATER, HARD: Characteristics

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago The critical factor is the soluble salt content; over 150 ppm. of calcium carbonate (CaCo/3) is hard, soap does not produce good lather; waters with less than 125 ppm. are excellent; up to 500 ppm.... Read More

WATER, HARD: De-ionized Water for Plants

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago For a few small plants one can buy the kind of water sold for steam irons in areas where the local water has a high sodium content. OD79-53 Read More

WATER, HARD: Deposits on Tree-fern Rafts

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago To dissolve these use a little nitric acid at pH of 4.0 to 4.5; add a few drops of dilute nitric acid to a plastic bucket of water and soak the rafts for 1/2 hour. A75-680 Read More

WATER, HARD: Devices Available for Removing the Cause

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 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 over 7 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