Assertion: rhododendron's root | /r/CapableOf | remain moist
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Source sentences:
text: Among them are some Iron-clads hybrids, which are regarded as the hardiest Rhododendrons and can tolerate open sites in sun (provided their roots remain moist).
text: After planting, consistent daily watering will ensure that the plant’s roots remain moist at all times, but not soggy, for roots that are either too dry or too wet can kill the plant.