People only like roses because they are beautiful and smell nice. What kind of message is that to send to the person you love? In addition, Roses wilt rather quickly and die fairly quickly (7-10 days if you keep them in water) and then you replace them with new younger roses that you only like because of their beauty. Is this the message you want to send to your lover? A potato on the other hand is durable and strong and will last almost forever. It will overcome hardships and still spout no matter how difficult life may be. In addition, a potato isn't the most aesthetically pleasing vegetable but that doesn't matter because we love the potato for what's inside (the delicious potato). Mentioning how it's delicious, a potato is something you can feed your family and help them grow strong. This is why a potato is a better symbol of love than roses.