Newly Posted Articles

VIRUS: Transmission

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Mechanical, insect and pollen agency, their numbers are uncounted; refer to AH86-11; transmission by pollen does not occur in cymbidiums but has been noted in dendrobiums and phalaenopsis. AH86-12 Read More

VITAMINS: As Plant Growth Substances

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago A brief review of some, such as thiamine, niacin, biotin, ascorbic acid, yeast; refer to OA83-52; refer also to OBIII-201; OBII-269, etc. Read More

VOLCANIC CINDERS: As Potting Medium

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Popular in Hawaii; a godsend to some; dry, epiphytic species love it; wet rain-forest plants do not take to it as well; the rougher the cinders the more water is absorbed and the better the plants ... Read More

WATER (GENERAL): Electrical Conductance

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Many water departments in municipalities supply the rates of electrical conductance in their analyses; less than 25 X 10-5 Mhos is excellent quality for growing orchids; 25 to 75 X 10-5 Mhos is goo... Read More

POTTING MIXES: General Suitability

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago For different genera: two parts peat moss, one part coarse sand, one part Perlite, an amount of bark to suit the requirements of the orchid; to one bushel of that add two ounces limestone and two o... Read More

PAPHIOPEDILUMS: Strap-leaved Kinds

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Long-petailed species and hybrids present problems of flowering successfully; for cultural advice refer to OA&5-172 Read More

CARBON DIOXIDE: How to Create it in a Greenhouse

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Burn candles or an alcohol lamp. A70-725 Read More

WATER (GENERAL): For Cymbidiums

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago PH of 7.9 is within a good range providing there are no soluble salts and toxic ions such as sodium and bicarbonate; citric acid of food grade phosphoric acid; in Santa Barbara, Cal., one quart of ... Read More

PALCO WOOL: Shredded Redwood Bark

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Used as an additive in potting mixes; tends to be acid. A76-775 Read More

WARDIAN CASES: Thirty Plants Under One Fluorescent Tube

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Resulted in the plants turning white and yellow from lack of light mainly; needed are four fluorescent tubes four ft. long; the plant leaves should be three inches below the lights, A63-303; A69-424 Read More