Sending flowers is a great option for your wife's birthday, but the best flowers should be ones she likes or that express your heart. Here are some possible options:
1.Red roses: Red roses are a symbol of love, and if you want to show your love and passion for her, sending a bouquet of red roses is a great option.
2.Pink Roses: Pink roses represent gratitude and appreciation, and if you want to thank her for her continued support and encouragement, it's a good idea to send a bouquet of pink roses.
3.Lily: Lily means purity and elegance, and if your wife likes this flower, it is a good choice to send a bouquet of lilies.
4.Tulips: Tulips come in yellow, pink, red, purple and other colors, representing preciousness, beauty and a confession of love, which is perfect for giving to a wife.
5.Kikyo: There are two types of bellflower: purple and white, which symbolize eternal love and unchanging commitment, and is suitable for expressing deep love for his wife.
Overall, the best flowers should be the ones she likes or that express your heart. At the same time, attaching a warm greeting card with sincere wishes and testimonials will make this gift more special and meaningful.