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Here is a list of zone 8 perennials.

https://www.gardeningknowhow.com/garden-how-to/gardening-by-zone/zone-8/zone-8-plants.htm

This can be due to an excess of nitrogen or a lack of phosphorus. Either of which can be fixed by adding phosphorus and potassium to the soil. This will, usually, correct this issue. Here is an article that will offer more information: https://www.gardeningknowhow.com/ornamental/bulbs/daffodil/daffodils-not-blooming.htm

It can be... They do tend to like the cold, depending on what zone you are in. This collection of articles will give you more information: https://www.gardeningknowhow.com/ornamental/bulbs/daffodil/

There are so many daylily varieties that you could do the entire 22 feet in different colors and sizes. The tall ones may be cramped in 3 ft is your bed abuts a sidewalk. Other options are Walker's Low catmint and perennial Salvia like "May Night". Both bloom in June and flowers are blue which will contrast nicely with the daylily. You might want to intersperse a vertical element like Indian grass, Sorghastrum nutans.

It looks like Narcissus White Marvel to me but searching google images brings up other possibilities. White Marvel is a hybrid.

What zone are you located in? This could have something to do with temperature. These need a cold period to recharge its ability to bloom.

Alternatively, there may be too much nitrogen, or not enough phosphorus and potassium to support healthy blooming. You can correct this by adding a high phosphorus and potassium fertilizer. This will offset the nitrogen.

Adding dolomitic lime can also help raise the pH if it is too low. This can make nitrogen more available while locking out phosphorus and potassium. Bringing this back up to neutral will help set the balance back.