Well-rotted house compost mixed with peat and chalk – chalk makes alkaline, therefore to be considered in how you use it; Can have live mycelium content (not always good); Little or no plant food content; Has a good physical effect on the soil.
Benefits: Will raise the soil pH as lime is used as a capping; The rest is well rotted horse manure.
Limitations: No accurate knowledge of calcium content; Can contain live mycelium and other spores.
Environmental: Cost of transport.
Health and Safety: Can contain or give off spores; Hygiene.
Timing of application: Autumn – and allow to be washed into the soil, then dig in or use as a mulch.
Effectiveness of the material: No accurate knowledge of calcium content.