Category: Culture

REST: Is it Necessary?

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Many orchids experience definite wet and dry periods in their native haunts but it is not necessarily the best way to treat them under cultivation; pseudobulbs from wet/dry areas can be tripled in ... Read More

REST: "semi-dry" Rest

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Is it possible to describe "semi-dry" water?; or is this an obfuscation for a type of rest period complete with light spraying with water to keep the pseudobulbs from shrivelling?; plus the rebutta... Read More

RESTING PERIOD: Defined

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago When the lead growth is mature, water and fertilizer can be withheld until the new growth or inflorescences show themselves. A87-733; for Catasetum expansum a rest period may last four months, unti... Read More

REVERSE OSMOSIS: Water Treatment

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago An outline of techniques and apparatus used to grow a variety of plants in Canadian peat moss in California using an apparatus and a meter to measure the contents of dissolved solutes (salts and wa... Read More

REVERSE OSMOSIS: What Is It?

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago A water filtration system, it removes most of the harmful mineral salts including white calcium residue-forming salts; available in five, fifteen or 25 gallom per day sizes; advt. A88-303 Read More

ROCK, LANDSCAPING: As Potting Medium

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Various forms have been used, especially lightweight lava aggregates used in the manufacture of concrete products; similar products go under different names such as Holite, Solite, Herculite; they ... Read More

ROCKWOOL: As Potting Medium

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago It is inert, a spun rock, like fiberglass, it comes in three grades -- fine, medium, coarse -- and in both absorbent and non-absorbent types, including Grodan horticultural grade, available in 3 or... Read More

ROCKWOOL: Absorbs Fertilizers

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago During a dark winter the Electric Conductivity can double in the nutrient solution, so make it half normal strength; urea fertilizer applied to it hardly has a chance to be used before it is washed... Read More

ROCKWOOL: With Perlite as Potting Mix

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago A two year commercial experiment growing in a mix of water-repellent rockwool and perlite, with trial balances of nutrients and trace elements was termed a success; advt. A87-Jy-xiv Read More

ROOTING: To Induce it

Author is Robert M. [Bert] Hamilton (Compiler), posted over 7 years ago Keep the plant dry at the base but provide a moist atmosphere by means of a plastic bag covering the whole plant until roots regenerate. A82-352 Read More