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Green Cones Go Red

Typically, cones mature on the redwood branches in autumn. They turn slightly yellow as the cone scales separate, exposing the seeds hidden within to the elements. Rain then washes away tannic crystals that hold the seeds inside the cones and releases the seeds to fall down onto the forest floor. This year, something else is happening and many green cones are falling onto the forest floor before they ripen. Probably a drought response, the falling green cone crop means fewer redwood seeds will land in the woods this year.

While this is not great for the seed bank, the green cones are fun to play with and I recommend dropping a few into a glass of water to see what happens. The tannic crystals inside the cones will dissolve and you’ll see the water turn a beautiful red color. Check it out!

For more about autumn color in the forest, read Deborah Zierten’s blog Fall Has Arrived.

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About Emily Burns

Emily joined Save the Redwoods League as the Director of Science in 2010 after studying redwood forest ecology for seven years.

Fall foliage along the Eel River. Photo by mlhradio, Flickr Creative Commons

Fall Has Arrived


Although our fall-changing trees are not as numerous as in the east, we can still see some evidence of fall here on the West Coast. In our redwood forests, look for big leaf maples and vine maples for their changing color.

Through the Woods with a Ranger and a Poet


As inspiring as the redwood forest can be, it is even better when shared. We know the inspirational surge that our favorite redwood places engender; it’s why we keep going back. And it is why we bring our friends there … Continued

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