noun
young grass; fresh green grass
Refers to grass that has newly sprouted, especially in spring. Often carries a poetic or seasonal nuance.
春になると、野原に若草が一面に生える。
In spring, young grass grows all over the field.
若草の香りが風に乗ってきた。
The scent of fresh grass came on the wind.
Compound of 若 (young) and 草 (grass). The reading わかくさ is a straightforward kun'yomi combination.