Protecting your plants in temperature extremes.
Western's molded fiber containers provide good insulation against heat and cold compared to other materials. Molded fiber (cellulose) is an excellent insulator. For example, note the relative “R-Values” for materials commonly used for pots, hanging baskets, etc.:
Molded Fiber Pot
.446” - Nominal Wall Thickness
2.643 - R-Value per inch of thickness
1.178 - R-Value for this wall thickness
.75” - Nominal Wall Thickness
1.11 - 1.48 - R-Value per inch of thickness
0.83 - 1.11 - R-Value for this wall thickness
.05” - Nominal Wall Thickness
0.44 - R-Value per inch of thickness
0.022 - R-Value for this wall thickness
Resistance (R-Value) = (Farenheit degrees x Foot^2 x Hour)/BTU. Data extracted from Pittsburgh Testing Laboratory, Report #823-16298 & ASHRAE Pocket Handbook, 1987 edition.
In this example, the molded fiber had approximately 50 times the insulation value of the plastic container, and a slightly better value than a cedar container with a wall that was 1/2 again as thick as the molded fiber container. This scientific comparison provides a great example of the superior insulating quality of molded fiber.
This makes molded fiber a container value that's hard to beat when the health of your plants require insulation from temperature extremes.