Even if you plant the seed upside down, the roots will still grow down.

即使你把种子倒过来种, 根须还是往下长.

《简明英汉词典》

In rainy September, when leaves grow down to the dark.

多雨的九月多雨的九月, 树叶越长越瘦,日渐灰暗.

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Why do you think roots grow down and shoots grow up?

你为什么认为根向下长,而嫩枝向上长?

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The leaves of bracket plant usually grow down ( downwards )

吊兰 的叶子通常往下长.

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Daylight will grow down during the winter.

冬天,白天会变短.

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The tide will soon grow down.

快要退潮了.

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