Newly Posted Articles

CYMBIDIUMS: Nutrition

Author is Robert M. [Bert] Hamilton (Compiler), posted over 8 years ago Trials with seven types of slow-release fertilizers showed Osmocote (8-9 months release rate) plus dolomite and trace elements maintained growth through "summer" at 3kg per cubic metre in the basic... Read More

CYMBIDIUMS: Optimums

Author is Robert M. [Bert] Hamilton (Compiler), posted over 8 years ago Experiments on young plants at Pukekohe, N.Z., showed that at temperatures of 15 dC nights to 20 dC days produced greatest leaf area; at 12 dC to 26 dC bud initiation was best; the less shade the b... Read More

CYMBIDIUMS: Optimums (minimum)

Author is Robert M. [Bert] Hamilton (Compiler), posted over 8 years ago 45 deg.F. to 50 deg.F at night; 60 to 70 percent relative humidity; 4,000 fc. in winter, 8,000 fc. in summer. AU71-135 Read More

CYMBIDIUMS: Petal Curl on Buds

Author is Robert M. [Bert] Hamilton (Compiler), posted over 8 years ago Top buds mainly show it; sepals rather than petals show it; due to heredity; may well trace back to Cym. grandiflorum (syn. hookerianum); only recourse is to open the flowers "over a water tank" un... Read More

AGE: Of Individual Plants

Author is Robert M. [Bert] Hamilton (Compiler), posted over 8 years ago In 1968 the Botanical Gardens of Copenhagen had a living plant of Oncidium sphacelatum which was collected in Mexico in 1841. A61-980; A68-405 Still in cultivation are various divisions of Paphi... Read More

FLOWERS: Best Time to Cut for the Sake of the Plant

Author is Robert M. [Bert] Hamilton (Compiler), posted over 8 years ago There is little advantage gained by cutting early, or at any particular time, except for pollinated flowers which take vitality from the plant. A79-272 Read More

FLOWERS: Black Dots or Rotten Blotches Appear One Week After Opening

Author is Robert M. [Bert] Hamilton (Compiler), posted over 8 years ago Caused by fungus; clean the greenhouse very carefully; fungus lives on dead plant material; spray everything with Benlate 1 ttpg.; provide air circulation; keep foliage dry at night. A72-1003 Read More

FLOWERS: Inducing Reluctant Petals to Open Fully for Show Purposes

Author is Robert M. [Bert] Hamilton (Compiler), posted over 8 years ago Press a small piece of sponge between the lip of the flower and each petal and sepal; remove after three or four days. OD69-288 Read More

HEAT, SUMMER: Excessive in the Greenhouse

Author is Robert M. [Bert] Hamilton (Compiler), posted over 8 years ago In Texas; no glazing material is better than glass; but good shade is required; latex shading is highly efficient for reflecting heat. A74-217 Read More

GREENHOUSES: Solar Types

Author is Robert M. [Bert] Hamilton (Compiler), posted over 8 years ago A system incorporating a conservatory to trap efficiently solar energy, with reflectors to boost input through geometrically oriented windows; apertures and insulation methods; 70 genera housed; il... Read More