Origin is useful shorthand and a bad rule. It is worth knowing where a plant comes from, and it is worth not treating that as the answer.
"Native to Colorado" is a very large claim. This state runs from high desert at four thousand feet to alpine tundra above eleven thousand, across soils that have nothing in common. A plant native to the eastern plains, or to a wet mountain meadow, or to the Front Range, may be entirely unsuited to a 5,500-foot valley with alkaline soil and eight inches of precipitation. The useful question is never "is it native" — it is native to what, at what elevation, in what ground.
Here are the three origins, and what each one tells you.
Where a plant is genuinely native to conditions like these, it is usually the low-input choice, and that is worth designing around. It has already solved the soil chemistry, it expects the precipitation, it is adapted to the swing between a 75-degree afternoon and a 35-degree night, and it supports the insects and birds that evolved alongside it.
Hybrids carry an undeserved reputation and are often the better performer here. A hybrid exists because somebody selected for something — disease resistance, a more compact habit, better cold tolerance, tolerance of alkaline soil. On a site that is genuinely difficult, a plant bred for the problem frequently beats a straight species that merely tolerates it.
Introduced plants get checked before they go on a plan. Plenty are excellent here and have been grown in this valley for a century. The check is against the Colorado noxious weed list, because a plant that thrives in this climate and also spreads on its own is not a feature — it is a removal job for somebody, and often for a neighbour downstream.
If a native or low-water planting is what you are after, say so at the start. It works considerably better as something that shapes the plan from the beginning than as a substitution exercise applied to a plan already drawn — and done properly it is one of the better-looking things we build.
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