Category: Orchid Doctor

CYMBIDIUMS: Nutrition

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

CYMBIDIUMS: Pots Standing in the Wet

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago In rainy conditions a film of water links all plants and from an infected one can spread phytophthora, rot, fungi, bacteria, even virus. OA80-79 Read More

CYMBIDIUMS: Potting Mix Basic Requirements

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago 1. high organic content, 2. good moisture retention. 3. good drainage. 4, good supply of nutrients, 5. a pH of about 5.5, 6. enough body to hold the plants firmly and retain moisture, 7. lasting qu... Read More

CYMBIDIUMS: Potting on

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Plants with five to nine bulbs with no backbulbs, or only one or two, should not be divided but potted on. OD68-122 Read More

CYMBIDIUMS: Propagating by Backbulbs

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Dormant vegetative eyes on the side are capable of new growth when detached, cleaned, set in flats filled with finer bark, or placed directly into pots and shaded. A83-148 Read More

CYMBIDIUMS: Propagation Methods

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago By division, by back bulbs, by layering and by meristem culture; all described in some detail, refer to OA80-182 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