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Science-based gardening information for Colorado communities from CSU Extension, Denver Botanic Gardens, and Green Industries of Colorado.

Reliable, timely information on more than 600 horticultural topics.


PlantTalk covers various topics including how to plant a tree, lawn care, houseplants, seed starting and more.

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Colorado Garden Blogs

Colorado gardening blogs combined into one location for easy viewing.

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Emerald Ash Borer

Emerald Ash Borer (EAB), detected in Boulder, Westminster and Larimer county, is a nonnative insect with no natural enemies to keep it in check.

Learn about EAB