Moon carrot Moon carrot. Trendy, cool, avant garde and of course its an UMBEL! Umbels are in, Umbels are in! Full sun and well drained soil of average to rich fertility. The second season a crazy number of tall flowers yield groups of umbels. Umbels upon umbels. Can you dig it? To 30″ tall and as wide. Moderate deer resistance Great cut flower. Blooms for up to two months. Easy to grow. Dislikes shade intensely. Biennial or short lived perennial.