noun
first fruits; first harvest
Refers to the first fruits or produce of the season, often with a celebratory or auspicious nuance.
今年の初生りを神棚に供えた。
We offered this year's first fruits on the household Shinto altar.
畑の初生りのきゅうりは特に美味しい。
The first cucumbers of the season from the field are especially delicious.
初物 is a more common term for the first produce of the season, while 初生り specifically emphasizes the first fruits borne by a plant or tree.
Compound of 初 (hatsu, 'first') and 生り (nari, 'bearing fruit', from 生る naru). The exact historical derivation is straightforward.