Category: Orchid Doctor

PAPHIOPEDILUMS: Browning of Leaves

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago It starts at the base, is caused by Erwinia cyprepedii for which there is no safe cure; it is not always caused by watering, but stale air conditions can contribute to its development; try drenchin... Read More

PAPHIOPEDILUMS: Buds, Browning

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Caused possibly by insufficient reserve food; or, infection by fungus; or, low light intensity and too high temperature at night. A78-698 Read More

PAPHIOPEDILUMS: Clonal Propagation

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago One application of Benzyladenine (Imgl- IBA) to a flowered division near the base will produce an axillary bud, thus valuable clones can be multiplied more rapidly under simple greenhouse condition... Read More

PAPHIOPEDILUMS: Colors of Flowers

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago They must be clean, clear, concentrated and contrasted to rate highly; is redder better?; vinicolors; culture and color; light used for evaluation of color; refer to SA87-21 Read More

PAPHIOPEDILUMS: Cool Growing, and Warm Growing

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago The first have solid green leaves the second have mottled or tessellated leaves; the division is misleading since some "cool" growing plants need 55 deg.F. nights; most others need 65 deg.F. nights... Read More

PAPHIOPEDILUMS: Deflasking

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago A new mix for P. rothschildianum seedlings is 35% rockwool, 35% firbark, 10% Styrofoam chips, 10% meranti (Shorea -- not in the R.H.S. Diet, of gardening) sawdust, 10% volcanic pumice; South Africa... Read More

PAPHIOPEDILUMS: Fertilization Schedule

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Monthly feeding should be enough; if the medium is largely peat moss use 18-18-18 ratio; if bark use 30-10-10, either at the rate of one ounce to 5.5 gallons of water. A&3-1074 Read More

PAPHIOPEDILUMS: Fertilizing

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago They do well without it for as long as several years then become poor in condition; feed at one-fifth strength high in nitrogen weakly, not weekly; water the day before. OD86-139 Read More

PAPHIOPEDILUMS: Fertilizing Over-done

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago It causes scorched areas most likely at leaf tips. A78-606; 1/2 tpg. 30-10-10 every 3 weeks, all plants. A80-739It causes slow growth, hard leaves and a yellowish tinge. A78-606 Read More

PAPHIOPEDILUMS: Flowering of Green-leafed Plants, Induced

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago For two to eight weeks in the fall provide night temparature of 55 deg.F.to 60 deg.F., with 77 deg.F. days. A79-894 Read More