Hopefully this helps:

Geneon licensed Rozen Maiden,[11] and completely released the first season on DVD (first DVD containing 4 episodes was released on May 29, 2007, with officially dubbed English. The other 8 episodes were released on two other DVDs ('Maiden War' and 'War of the Rose'). The special edition DVD comes with a velveteen artbox. Geneon's Rozen Maiden license was announced through a unique "Guess The Geneon License" contest through Anime News Network. This contest was conducted through a scavenger hunt held in the form of a podcast. Listeners had to discover various clues that were littered throughout the podcast English logo for Little airplane.[citation needed]

The first DVD of the second season, 'Puppet Show', was released on October 23, 2007. The other two DVDs, 'Revival' and 'The Alice game' were supposed to come out in December of that year, but were delayed due to Geneon pulling out of North American DVD sales[12]. On July 3, 2008, Geneon Entertainment and Funimation Entertainment announced an agreement to distribute select titles in North America. While Geneon Entertainment will still retain the license, Funimation Entertainment will assume exclusive rights to the manufacturing, marketing, sales and distribution of select titles. Rozen Maiden and Rozen Maiden Traumend were two of several titles involved in the deal.[13]

Tokyopop Germany has completely released the first season on DVD, and the first Träumend DVD has originally been announced for March 2008, but due to increasing illegal downloads and DVD anime sales decreasing, it will not be released.[14].

Kaze, an anime publisher in France, has licensed the anime and has completely released the first, the second season and the OVA.

The Rozen Maiden Träumend box set, containing the whole second season was released on July 21, 2009.