Which bouquet to choose and where to order it in Riga?

What do you think would be the best flowers to give to my former teacher for her 70th birthday? She lives in Riga and I would like to order flowers and have them delivered to her address. Maybe you can suggest a reliable delivery service? Do you have any feedback about https://www.krokus.lv/en/? I don’t know what kind of flowers she likes, so I’m thinking of giving her a bouquet of different flowers.