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Human Worlds

Some plants can survive anywhere, even the heart of the city. These "weeds", like the Ivy-Leaved Toadflax, can grow on walls and other shear surfaces without any soil. The plant grows and blooms towards the light to attract pollinators, but once the seedpods develop it will turn inwards seeking a dark crevice to grow in. Such cracks are all it needs to produce a new plant.
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Clip Season 1 Episode 5 Length 02:32 Premiere: 08/03/22

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Season 1 Episodes

Human Worlds
S1 E5 Length 55:55 Premiere Date 08/03/22

Desert Worlds
S1 E4 Length 55:55 Premiere Date 07/27/22

Seasonal Worlds
S1 E3 Length 55:55 Premiere Date 07/20/22

Water Worlds
S1 E2 Length 55:55 Premiere Date 07/13/22

Tropical Worlds
S1 E1 Length 55:54 Premiere Date 07/06/22

How Do You Pollinate 40 Million Almond Trees?
Clip Length 02:33 Premiere Date 08/03/22

One Sharpshooter Way to Stop an Invasive Plant
Clip Length 02:20 Premiere Date 08/03/22

How "Weeds" Grow in the Sidewalk
Clip Length 02:32 Premiere Date 08/03/22

Seeds that Literally Run Away
Clip Length 02:27 Premiere Date 08/03/22

The Green Planet - Teaser
Preview Length 00:30 Premiere Date 07/06/22

Official Preview
Preview Length 00:30 Premiere Date 07/06/22

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Desert Worlds - S1 E4

Plants can spend decades waiting for rain or travel to find it in the hostile world of the desert. Survival tactics include using weapons, camouflage and forming surprising alliances with animals.

  • Sunday April 26, 2026 10:00 pm ET on KET2
  • Sunday April 26, 2026 9:00 pm CT on KET2
  • Tuesday April 28, 2026 4:00 am ET on KET2
  • Tuesday April 28, 2026 3:00 am CT on KET2

Human Worlds - S1 E5

David Attenborough reveals how humans are helping plants, many of which face extinction, including projects in Africa and rebuilding a Brazilian rainforest tree by tree.

  • Sunday May 3, 2026 10:00 pm ET on KET2
  • Sunday May 3, 2026 9:00 pm CT on KET2
  • Tuesday May 5, 2026 4:00 am ET on KET2
  • Tuesday May 5, 2026 3:00 am CT on KET2
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Seasonal Worlds - S1 E3

  • Tuesday April 21, 2026 4:00 am ET on KET2
  • Tuesday April 21, 2026 3:00 am CT on KET2
  • Sunday April 19, 2026 10:00 pm ET on KET2
  • Sunday April 19, 2026 9:00 pm CT on KET2

Water Worlds - S1 E2

  • Tuesday April 14, 2026 4:00 am ET on KET2
  • Tuesday April 14, 2026 3:00 am CT on KET2
  • Sunday April 12, 2026 10:00 pm ET on KET2
  • Sunday April 12, 2026 9:00 pm CT on KET2

Tropical Worlds - S1 E1

  • Tuesday April 7, 2026 4:00 am ET on KET2
  • Tuesday April 7, 2026 3:00 am CT on KET2
  • Sunday April 5, 2026 10:00 pm ET on KET2
  • Sunday April 5, 2026 9:00 pm CT on KET2
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