Atsuko is an open-pollinated Chinese cabbage cultivar developed in Germany specifically for quality-oriented organic and biodynamic cropping. This cultivar was developed through individual selection from a non-homogenous cultivar (Asko) characterized by a highly variable head shape and poor harvesting rate. Compared to hybrids, Atsuko exhibits ample homogeneity, excellent head firmness, and a sufficient harvesting rate. Compared to the initial cultivar, field resistance to diseases is markedly increased, although it is not resistant to fungal decay or bacterial rot. Atsuko is also characterized by low to medium plant height with egg-shaped (ovate), intermediately wide, and short heads of yellow-greenish colour and whitish inner colour; medium number of small blisters on the upper side of the outer leaf; excellent head firmness; and early harvesting time.