Ask a Scientist: "How do plants grow?"
April 20, 2018
There are more than 300,000 different kinds of plants, including plants that live in the ocean like kelp, and plants that live in the desert like cactuses. There are microscopic plants like algae, and gigantic plants that can be very old like redwood trees.  But no matter what, all plants need the same four things to grow: water, air, sunlight and nutrients.
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