Answer: Based on your description I am not certain what has happened. If they were "bad" you would have noticed a bad odor or smell of rot or mushiness when you took them out of the package. Or they might have possibly been too dried out. They should have been plump and firm (sort of like a carrot would be) rather than shriveled and dried out. If they were too dried out, they would not grow.
Daylilies such as Stella d'Oro are not bulbs, so you would not bury them completely underground as you would gladiolus for example. Instead, you would plant them with the roots under the soil and the crown (where the roots and stem meet) at soil level. If they are planted too deeply, they might have rotted.
You could gently dig down and check to see what is happening to them and to check the planting depth. If necessary, reset them higher. Keep the soil evenly moist like a wrung out sponge, not sopping wet and not dried out. Sometimes newly planted perennials can take a little longer than normal to start into growth. Hopefully these will grow for you.
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