Category: Culture

PLASTIC, GREEN: For Greenhouse Shading

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago It can be used to reduce the light up to 65%, but it removes good plant-growing red light from the plants, and some heat rays on clear days that might otherwise be useful. A74-502 Read More

PLASTIC STRING: As Potting Material

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Bundles interspersed with polystyrene create much drier conditions than other media; use with plants requiring little water -- leptotes, diacrium, brassavola. OR69-275 Read More

PLASTICS: For Greenhouses

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago There are no standards for construction or quality and no specifications; clear is suggested for orchids, or, also known as colorless, with ultra-violet resistance. A75-298 Read More

POLYETHYLENE BAGS: Used for Packing Orchids

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Dry out the plants first (superficially) pack fairly tighly in polyethylene bags and place a 1/2 teaspoon to 1 tablespoon of malathion powder with each plant; tumble it about then press out the air... Read More

PH OF WATER: Citric Acid Used

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Local water supply was highly alkaline, pH of 10.5, and was lowered to 5.5 twice weekly using a Hydromix proportioning unit; a drop or two of food coloring was also added. A72-1003 Read More

POLYETHYLENE FILM: Inside Insulation

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago 6 mil. will not block out too much light if kept clean. A77-995 Read More

POLYETHYLENE FILM: Liner for Greenhouse

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago For conserving heat the most economical is the 4 mil polyethylene; it provides a slight shading effect. OD78-2 Read More

POLYSTYRENE: Potting Material

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago In bead form; common ingredient in Europe; an insulating material, extremely light, inert, does not saturate or rot, retains moisture on surface only; used in a mix with peat moss, sand and sphagnu... Read More

PORTLAND CEMENT: As Dessicant for Seed Storage

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Wrap some Portland cement powder in paper towelling and place in the bottom of a screw-capped jar with the seeds wrapped in tissue paper. A76-528 Read More

FERTILIZERS: Organic or Inorganic

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Bacterial activity is low at 50 deg.F. (10 deg.C.) so it is better to use inorganic types of fertilizer in cold weather;use an organic in warmer temperatures. AU73-185Both can be used; liquid organ... Read More