Category: Culture

FERTILIZERS: 30-10-10 for Plants in Tree Fern and Redwood Bark

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago The formulation is suitable the year round. A73-991 Read More

LIGHTS, GROWING UNDER: Transfer of Plants to Greenhouse

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Reduce the light by shading the greenhouse to provide from 2,000 to 2,500fc. of light at noon; until plants are hardened. A75-124 Read More

LIGHTS, GROWING UNDER: Use of Super-high-output Fluorescent Tubes

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Orchids seem to grow faster and require more water and fertilizer than under ordinary lamps; provide three areas of different light intensity; refer to A71-869+ Read More

LIGHTS, GROWING UNDER: What Temperature, Humidity, Light Hours and Distance Between Lights and Leaves Required

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Night temperature should be from 60 deg.F. to about 64; day should be 70 to 80 deg.F.; high humidity in the 60 to 70% range recommended; leave lights on for seedlings for 16 to 20 hours. A70-235 Read More

LIME: Added to Potting Mix

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago To get the potting mix to 6pH add approximately 20 lbs. of lime per cu.yd. of bark; use dolomite lime or oyster shell flour, or even better, half-and-half of each. A071-29 Read More

LIME: Dolomite, Its Characteristics

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago A mined, fossil-like form contains both calcium carbonate and magnesium; it adjusts the pH of bark; usually added with oyster shell because the two are better than one alone; beneficial in areas wh... Read More

LIME: Oyster Shell, Its Characteristics

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago It is calcium carbonate lime; ground up shells comes in coarse type for chicken scratch or flour type used by many orchid growers. C74-51 Read More

LIME WATER: Recipe

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago One tsp. of hydrated lime is dissolved in a gallon of water; may be used to adjust the pH of potting media, upwards. A79-898; 1/2 tsp. limestone per 6 inch pot raises pH 5.0 up. A80-739 Read More

CARBON DIOXIDE: Percentages of Composition

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago In air it is about three hundredths of one percent; plants can use greater amounts to approximately 0.5 to 1%; data not related to orchids. OR72-34 Read More

FERTILIZERS: 30-10-10 with Soil Acidifiers and Chelated Iron

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago A suitable fertilizer, use 1/2 tpg. at every watering but let 10% of the liquid run out of the pot for leaching action. A74-114 Read More