Backfilling, Trees, Shrubs & Herbaceous Borders
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This specification applies to the installation (planting) of various types of plant materials, including bare root, containerized, and balled and burlapped stock.
Fairfield's compost meets the requirements of the BSI PAS 100, which ensures we meet the minimum standards and the specification limits on stones, weed seeds and physical and chemical contaminants.
The specification below sets out additional requirements for the use of compost in planting pit preparation:
|
Parameters |
Units of Measure |
Recommended Range |
|
pH* |
pH Units (1:5 water extract) |
7.0 - 8.7 |
|
Moisture Content |
%mm of fresh weight |
35% - 55% |
|
Organic Matter Content |
% dry weight basis |
25% minimum |
|
Electrical Conductivity |
mS/m (1:5 water extract) |
200 maximum |
|
Particle Sizing |
% m/m of air-dried sample passing the selected mesh |
99% pass through 25mm screen 90% pass through 10mm screen |
|
C:N Ratio |
|
20:1 maximum |
|
Contaminant |
Various |
Meet BSI PAS 100* Criteria |
*Fairfield's compost has a pH level of 7
