Assertion: comfrey's use | /r/HasProperty | due
Facets:
value: in organic gardening
type: OTHER
Source sentences:
text: The therapeutic use of comfrey is due in part to allantoin and rosmarinic acid content, but it is limited by the toxicity of pyrrolizidine alkaloids.
text: In organic gardening, comfrey’s beneficial use as a fertilizer is due to its deep root system.