In spring all leaves turn green.

春天所有的树叶都变成了绿色。

youdao

Trees turn green and flowers start to blossom.

树木变绿了，鲜花开始绽放。

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Trees turn green and flowers start to blossom..

树变绿了，鲜花也开始绽放。

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It has flowers like stars and shiny berries that start out green and turn purple to black.

VOA: special.2009.08.25

They turn Green, an envious green, only when they see rich folks in fancy cars and airplanes.

FORBES: Green Greens versus Red Greens

Today the water-filled terraces reflect the sky from November through April, and turn green in spring as the rice plants grow tall.

WSJ: Only in...Yunnan

The request is part of a campaign which sees some of world's landmarks, including the Sydney Opera House and the pyramids, turn green on 17 March.

BBC: Queen answers Irish bid to turn Buckingham Palace green