Assertion: comfrey's root | /r/HasProperty | hardy
Facets:
value: very winter
type: DEGREE
value: to minus 40 degrees
type: OTHER
Source sentences:
text: The roots are hardy, no need to be gentle.
text: the perennial roots are hardy to minus 40 degrees (-40)!
text: — 4–9 Comfrey crowns and roots are very winter hardy