The surprise is the gift
Birthdays and anniversaries come with expectations. Flowers on a random Tuesday do not. That is why just because flowers often mean the most. They say I was thinking of you, with no occasion attached.
Let the florist have some freedom. Tell them who the flowers are for and a little about the person, then ask for whatever is fresh and pretty that week. Seasonal flowers are often the best value and the best looking. See our seasonal flowers guide.
Good just because ideas include a friend going through a hard stretch, a sister who just moved, a grandparent in senior living or a spouse who has been carrying a lot lately.