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Christian Hägg

Christian writes about the hidden structures of the natural world: spirals, symmetries, adaptations, and the oddities that make plants fascinating. His interests include carnivorous plants, mathematical patterns in nature, and the science behind everyday garden life.

The sleepy garden: why plants fold their leaves at night

The sleepy garden: why plants fold their leaves at night

At dusk, some plants begin to rearrange themselves. A prayer plant lifts its patterned leaves until they stand like hands held together. Purple oxalis folds its triangular leaflets into little tents. Clover pulls its leaflets close, and some flowers that looked cheerful at lunchtime quietly close the shop. It is tempting to call this sleep, and gardeners have been doing…

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How hard seeds wake up

How hard seeds wake up

February is when seed packets begin to feel less like storage and more like possibility. They gather on the kitchen table in little paper stacks: sweet peas, nasturtiums, morning glories, lupines, okra, perhaps a packet of saved seeds from last summer whose name is written in fading pencil. Some will sprout almost as soon as they meet warmth and moisture.…

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