These crops were destroyed by a giant storm that ravaged the planet in Age 261. Dende describes this scenario to Krillin and Gohan during dinner when Krillin wonders why Namekians cultivate this plant since they do not need food and only drink water. Initially, Krillin thought that the crops were supposed to be consumed by the Namekians, but Dende reveals that the crops are cultivated only to enhance the beauty of their planet.
Video game appearances
In Dragon Ball Online, ajisa trees were grown on Earth by the Time Breakers using Namekrystal. They were both used in the construction of Chocolay Tower, and were also poisoned by General Sus so that they were turned into vessels for absorbing kiri.
In Dragon Ball Xenoverse 2, the Namek Area of Conton City is sometimes referred to as the Ajisa District due the Ajisa grown there. Frieza Race Time Patroller Blizza explains that the Ajisa District was added as part of a Conton City drive to add a little greenery to the urban area. As a result, several Namekian Time Patrollers work as farmers within the Ajisa District and also grow vegetables for their fellow Time Patrollers in addition to Ajisa. Additionally in the Guru's House Time Rift anomaly a Namekian Farmer named Mekuji grows Ajisa and vegetables in a field behind Guru's House.