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Data Studies

Compiled by · Reviewed against the 2024 Front Range Tree Recommendation List, CSU Extension & Plant Select® · Updated 2026-06-10

Quick answer

Original, reproducible research on what the Front Range actually plants and what survives here. Every figure traces to public data you can check for yourself, the city tree inventories, the 2024 recommendation list, and the largest study of US city trees.

Did the Front Range Plant the Wrong Trees?

What the Front Range actually plants versus what survives here, four cities' public tree inventories joined to the 2024 recommendation list, mapped block by block, and set against the rest of the country.

Roughly 1 in 5 of Denver's public trees is a species the 2024 Front Range list rates Not Recommended.
Part 1: 1 in 5 city trees are Not RecommendedFour city tree inventories joined to the 2024 list, the Denver ash map block by block, and how the Front Range compares to peer US cities.Part 2: Is the Front Range fixing its trees?By trunk diameter, ash is a fraction of recently-planted trees versus the mid-life canopy, and cities now ban new ash.

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