Advice on very narrow strip of soil.

This strip of soil runs adjacent to our washing line and pavers. We'd love to plant something here to improve the look and stop the weeds taking over. We're near the river so typically things grow well in the soil. It's reasonabley deep as used to be garden bed. Morning full sun and then shade in the afternoon. My husband has debilitating hayfever so ideally nothing pollen heavy! Any advice would be so much appreciated.

This strip of soil runs adjacent to our washing line and pavers. We'd love to plant something here to improve the look and stop the weeds taking over. We're near the river so typically things grow well in the soil. It's reasonabley deep as used to be garden bed. Morning full sun and then shade in the afternoon. My husband has debilitating hayfever so ideally nothing pollen heavy! Any advice would be so much appreciated.