Cabbage. Pe-Tsai Napa Cabbage

Cabbage. Pe-Tsai Full name of this variety is Kitajsko Zelje Pe-Tsai. About 30cms tall, forms an upright, tightly wrapped head with light green serrated, veined leaves. Can be eaten raw or cooked.
6 grams of seed. 

Napa or napa cabbage is a type of Chinese cabbage originating near the Beijing region of China and is widely used in East Asian cuisine. Since the 20th century, it has also become a widespread crop in Europe, the Americas and Australia. In much of the world, this is the vegetable referred to as "Chinese cabbage". Wikipedia

Chinese cabbage likes the proximity of celery because it protects it from pests such as cabbage pierid that hate the smell of celery