Newly Posted Articles

GREENHOUSES: Unheated in San Francisco

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Growth and flowering may be delayed at a night temperature of about 50 dF (lO dC); if the temperature was lower the plants should be given some warmth or moved to a warmer area at critical times. A... Read More

GREENHOUSES: Weed Control on Gravel Floor

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Weeds growing from the soil under the gravel can be sprayed with Simazine 80W, or with Telvar, or with ordinary borax. A70-427; A71-609 Read More

GREENHOUSES: Western Red Cedar Construction

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago For data on design, construction pointers, etc. refer to OR87-14 (England) Read More

COLCHICINE: Used to Change the Ploidy of Clones

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago A problem arises in reconciling the identification of the new chemically treated result with the original clone; some growers designate the new result with "4N", but the new clone may not be tetrap... Read More

COLORS OF FLOWERS: Analysis

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago For details on genetic controls, chemistry, strategies in breeding for red and other colors, plus light-reflecting epidermal jewels and "hairs"; light quality and judging flowers by it, also, color... Read More

FERTILIZERS: For Cattleyas, Paphiopedilums and Miltonias

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Using organic fertilizer such as fish emulsion (5-1-1) once in a while is good but continued use does not provide enough potassium and phosphorous; a 3-1-1 ratio soluble fertilizer provides them in... Read More

COLORS OF FLOWERS: Describing of Flowers

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Problems of terminology and description in writing about colors; the variability of pigments and their value by consensus of opinion; genetics in albas, self-colors, concolors, peloric flowers and ... Read More

COLORS OF FLOWERS: How to Enhance Them

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago It is boosted by an acidic medium, as in tree fern, AU82-36 Read More

VOLCK OIL SPRAY: As a Spreader-sticker for Sprays

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Do not use it; use DuPont wetter-sticker, or Rohm & Haas spreader-sticker No.1956, or General Chemical Phylac, or some other. A74-300 Read More

COLORS OF FLOWERS: Red in Breeding

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Red in orchids is connected with smallness; fiery reds are tricky especially in oncidium breeding and lead to small flowers; most spots and splashes are red; out of a dozen flasks of a "red" cross ... Read More