Category: Orchid Doctor

REFLECTIVE MATERIALS: On Greenhouse Walls to Increase Light

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Aluminum foil, spectral aluminum, or spectral Mylar have been used; they do increase the amount of light available to the plants; white paint is also recommended; aluminum foil can act as a collect... Read More

REGISTRATION OF NAMES: And Non-registration

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Parentage declaration and registration at the Royal Horticultural Society is traditional but the rise of patented plants has led to secrecy of breeding lines and non-registration of them; examples:... Read More

RENANTHERA STORIEI: A Problem Plant

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Seven years without a flower; it is a difficult plant to flower in the U.S.; it requires moist conditions, a sunny exposure and temperature well above 50 deg.F. at night. A71-536 Read More

REPOTTING: Basic Rules Everyone Should Follow

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Do it at least once every two years, although there can be exceptions; both heavy watering and fertilizing can shorten this period; sympodials can be done either when root growth begins in spring a... Read More

REPOTTING: Neglected

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Masses of roots and growths developing outside a pot results in extensive root damage; wait for new roots to show on newest leads; treat the plants as invalids for a month. A67-565 Read More

REPOTTING: Rooting Hormone

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago For cymbidiums use a solution of B-One or Superthrive every ten days to aid rooting. OD74-42 Read More

REPOTTING: When in Doubt

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Repot paphiopedilums any time because it is almost impossible to repot them too often; if a plant shows sgns of stress or suffering, repot it. OR80-162 Read More

REPOTTING: Wrong Time

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Divisions with no emerging roots warrant treatment as for imported plants if repotted at the wrong time; they need high humidity, shade, frequent light syringings and care to avoid overwatering, ot... Read More

RESMETHRIN: As An Insecticide

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago It is useful for gnat control, a one percent aerosol can be used againt adults. AH86-59 Read More

RESPIRATION RATES: Of Plant Tissue

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago It starts at a low temperature of 40 dF, and at 60 dF the rate is 28%, at 70 degrees it is 40%, at 80 it is 50%, at 90 it is 65%, at 100 it is 75%, at 118 it is 100% and after that the plant begins... Read More