Simple past tense and past participle of ripen.(verb)
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Use "ripened" in a sentence
"The latter rain ripened the grain, as the former rain in October tended to fructify the seed."
"Directly the rains ceased, the grain ripened with still greater rapidity, and was gathered in before the end of May."
"But care should be taken that the wood has ripened, which is known by its assuming a brown and hard appearance, This strengthens the vegetation of the branches, which begin to throw out buds, and these shortly form collateral branches; in the course of eighteen months after the tree will have arrived at its bearing point."