Nepeta cataria: seeds

Nepeta cataria, known in English as catnip and in French as cataire, chataire, or herbe aux chats, is a fragrant perennial in the mint family, native to Europe, Asia, and Africa. Although it has spikes of small white flowers, it is most often grown for its foliage, which many cats enjoy as a recreational "drug".

This is my first year growing catnip. Since the seed packet says it may be sown in fall or spring, I assume it will be fine wintersown. The seeds are quite small and dark brown.