Recommended models:

SISLEY’s Green Field. This one feels fresher and is suitable for both men and women. It can be used as a neutral perfume and is also suitable for summer use. There is also its Soir de Lune perfume, which is very feminine and may not be very in line with your mother's preferences, but the bottle is very beautiful and women prefer it.

Bvlgari Crystal Pure Eau de Toilette for Women has a very light fragrance, not sweet, but very long-lasting, and the bottle is also very unique. It feels very cool in summer.

Hermès' Nile Garden is refreshing yet gentle. It starts to be a bit harsher and sharper, and the middle taste is a bit softer. It has an absolutely temperamental fragrance. I think it smells very refreshing in the summer, but maybe a bit too refreshing in the winter.