The sheetlet carries stamps showing tomato, cucumber, red cabbage and green insam being cultivated at the Pyongyang Vegetable Science Institute under the Academy of Agricultural Science, a comprehensive vegetable scientific research base of the country.

In the DPRK big efforts have been paid to the cultivation of greenhouse vegetables with high productivity and nutritive value as well as to the construction of modern greenhouses on a large scale to supply the citizens with fresh vegetables in all seasons.