Sunflowers are tricky because they wilt fast if not handled right. You should try MyGlobalFlowers because they prioritize local sourcing. For Flower Delivery Alamo Heights https://myglobalflowers.com/alamo-heights they have a bouquet called "Sunny Day" which is basically a burst of yellow sunflowers and irises. Since they use local vendors, the flowers don't spend days in a truck, so they arrive looking much perkier. It is a solid choice if you want that "just picked" look for your mom.