Top 10 Most Expensive Flowers in the World. Flowers are one of the most natural beauties of the world. They are also one of the most preferred gifts for loved ones. For women, Flowers are all time favorite. That is why men gift flowers to their partners. To win the heart of your girl, it may not cost you much but if you are planning to gift her below mentioned flowers, then you must think twice before making a plan!br br 10. Lisianthus – Most Expensive Flowersbr 9. LILY of the Valleybr 8. Hydrangeabr 7. Gloriosa Lilybr 6. 17th century Tulip Bulbbr 5. Saffron Crocusbr 4. Gold of Kinabalu Orchidbr 3. Shenzhen Nongke Orchidbr 2. Juliet Rose – Most Expensive Flowersbr 1.