Category: Orchid Doctor

CYMBIDIUMS: Pseudobulbs, Mature

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Maturity is reached when eight to 10 leaves have grown; spike initiation should occur. OA78-166 Read More

CYMBIDIUMS: Red Spider Treatment

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Use Temik once or twice a year to discourage build-up; during flowering season the two best miticides are Pentac and Vendex plus wetting agent, because they are gentle on flowers and do not cause b... Read More

CYMBIDIUMS: Repotting

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago After flowering the plants are divided into 4-; or 5- bulb sections and repotted; roots may be trimmed first. A81-526Begin in January right after flowering starts; slice off an inch of the old root... Read More

CYMBIDIUMS: Root Injury in Potting

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Nearly every root more than two inches gets broken in repotting; this has little effect on the plant's ability to grow and bloom on time. A64-583 Read More

CYMBIDIUMS: Rot on Leaves, Had Unpleasant Smell

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago May be Erwinia carotovora a virulent bacterial condition; bare root the plant, cut out all rot, soak roots and base in Physan or a good fungicide/bactericide for 1/2 hour, dry out, pot and run dry.... Read More

CYMBIDIUMS: Seasonal Shortage of Flowers

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago The most common reason for failure to flower in the north is shortage of growing season, not enough sunshine, which makes them permanently non-flowering; try warmth starting in February and maybe a... Read More

CYMBIDIUMS: Seedlings

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago After deflasking, start them in green moss which is available at most garden shops; roll some seedling roots in a strip of moss and place the wad in a pot as a cluster. OA86-207Always cull them; 95... Read More

CYMBIDIUMS: Sepal Curl

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Can be caused by spraying with an emulsion concentrate insecticide such as Zectran. C71-199; OA78-195; or, by too much wetting agent. C72-122 Read More

CYMBIDIUMS: Shading Green Flowers

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Shade them shortly after buds are exposed from the sheath; this prevents red pigments forming to cause muddy coloration later. OA75-179 Read More

ACID OR ALKALINE: Changing the Values

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Various means can be used: tufa, a limestone form, can be added to paphiopedilums from limestone cliffs; bark composts acidify with age; peatmoss, pine needles, oak leaves in the mix produce acidit... Read More