Plants are sourced from SOLSO's own farms in Awaji, Okinawa, and Hachijojima, offering species uncommon in typical Tokyo garden centers. The facility houses approximately 230 species of plants, ranging from small succulents and cacti at the entrance to large trees, tropical elkhorn ferns, and giant cacti deeper inside. The outdoor areas feature herbs, olive and lemon trees, alongside exotic tropical specimens. The selection changes seasonally, providing variety throughout the year.