The rose on Valentine's Day belongs to the Chinese rose, and the effect is actually similar to that with roses. Although you can eat Chinese rose, you can't eat it if you buy it in a flower shop and give it away. For the sake of beauty and convenience, this flower will be treated with corresponding drugs, which may be poisoned if eaten.
If you grow it yourself, you can pickle it with sugar and make it into rose sauce. You can also cook porridge, but the fragrance of natural Chinese rose is relatively light, so it is not as delicious as eating roses.