This fragrant topiary hails from the witch Nadia's nursery in Cadberry Meadows. Special magic keeps it free from thorns and retains its heart shape. Nadia's also an accomplished baker, hence her strange interpretation of a "dozen".
The Rose Topiary's description states, "strange interpretation of a dozen". This likely a reference to the classic gift of a dozen red roses, and the fact that the Rose Topiary contains thirteen visible roses whereas a dozen is usually twelve and a baker's dozen is thirteen.
The Rose Topiary's description mentions, "Cadberry Meadows". This is likely a reference to the Cadbury candy company, which produces Cadbury Roses