Category: Orchid Doctor

LEAVES: Emerging From Center of New Growth

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago As in cymbidiums, vigorous new growth in the center is desirable to promote as large a bulb as possible on maturity. OD68-172 Read More

LEAVES: Fungus Treatment

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Spotted and pitted leaves require treatment with a paste made of captan or other fungicide; coat the whole infected area and let the paste dry; wash the bench with captan in water and spray all the... Read More

LEAVES: Hard Water Deposits

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago It is difficult to remove them, the best bet is to scrub the deposits with lemon juice or a very mild acid solution, and rinse it off after. A82-1259 Read More

LEAVES: Mesophyll Cell Collapse

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago This happens especially in phalaenopsis and is caused by cold water dripping off the roof or from the hose onto the leaves; the scars become visible about six weeks after. F81-14 Read More

LEAVES: New Ones Do Not Open

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago They remain partly closed; try periodic syringing in the morning; there is no definite remedy. A78-226 Read More

LEAVES: Old and Browning

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Caused by old age or root injury. A78-226 Read More

LEAVES: On Ascocendas Have Bacterial Leaf Rot

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Bordeaux mixture is not very effective against bacteria, so use Physan at 15 ml. per gal. of water. A74-792 Read More

LEAVES: On Cattleyas Are Black Edged

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Inadequate light contributes to dark, soft growths which are not self-supporting; brown, drying edges indicate root injury. A71-1021 Read More

LEAVES: On Cattleyas Are Drooping

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Check roots for possible bush snails or for over-watering; the root system is the key to healthy plants. A77-449 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