、。
She watched the field's crops grow and the apples ripen red.
Literal
She [topic-は] field's crops [subject-が] grow, apple's fruit [subject-が] [redly-赤く] ripen [nominalizer-の] [object-を] saw.
Two parallel embedded events linked by the verb-stem 育ち (a literary alternative to the te-form 育って) — 'crops grow and apples ripen.' The whole compound event is nominalized with の and watched (見ました, polite past). 赤く熟す ('ripen red,' literally 'ripen redly') uses the adverbial form of 赤い to describe how the ripening proceeds.