1. 'Lula'became recognized for its excellent eating qualities, steady production, and cold hardiness . 2. Cold hardiness is a plant's tolerance to a specific minimum temperature.3. One of the characteristics'Monroe'inherited from its Guatemalan-type parent was some degree of cold hardiness . 4. However, even nearby populations can differ in cold hardiness . 5. This, plus disease resistance and cold hardiness , are key criteria for selecting this year's Cary Award-winning plants. 6. Payne's work on cold hardiness in insects continues to be cited as a foundation for later research. 7. It is widely known for its extreme cold hardiness and its slow growth compared to other palmetto species. 8. This cold hardiness enables it to survive temperatures below freezing, provided that adequate shelter and food are available. 9. "This plant is the basis of our cold hardiness , " said Ackerman, 77, patting the camellia's cinnamon-colored bark. 10. Aside from cold hardiness , " Vitis acerifolia " provides many potential benefits for the breeding of hybrid grapes.