Assertion: comfrey's root | /r/HasProperty | thick tuberous
Facets:
Source sentences:
text: It’s a nutrient rich ‘chop and drop’ mulch and compost activator, helps to break up compacted soils with its’ thick tuberous roots, can serve as a barrier to spreading grasses and weeds, and the leaves make a potent plant based liquid fertiliser.
text: It has thick long black roots that take hold quickly, and a straight hollow hairy stem supporting large heavy broad leaves, which are also hairy and prickly.