Trees, shrubs and plants that are to be avoided in our area - Ask Extension
I'm aware of the helpful CSU Extension Office publications that suggest water-wise horticulture, smart landscaping etc. BUT Is there a list of ("N0 ...
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Trees, shrubs and plants that are to be avoided in our area #892518
Asked February 10, 2025, 4:04 PM EST
I'm aware of the helpful CSU Extension Office publications that suggest water-wise horticulture, smart landscaping etc. BUT Is there a list of ("N0 No") ie Russian Olives, sumacs etc
Thank you from our HOA
Larimer County Colorado
Expert Response
Hi Linda,
We have a "not recommended" list for trees, which is included in the updated Front Range Tree Recommendation list, found here: https://planttalk.colostate.edu/wp-content/uploads/2024/04/2024-Front-Range-Tree-List.pdf. See page 10 of the trees not recommended.
You'll also want to avoid any plants on the Noxious Weed "watch list": https://ag.colorado.gov/conservation/noxious-weeds/species-id#d
In the CSU Extension fact sheets, plants labeled as "aggressive", "vigorous", or "spreading" may also indicate the potential to get invasive, especially if they are receive too much water. A great example is prairie winecups (Callirhoe). It's a great waterwise perennial, but if it's in a well-watered landscape, can spread aggressively. So as much as it is in the plant, appropriately watering and cultural conditions are also key.
We have a "not recommended" list for trees, which is included in the updated Front Range Tree Recommendation list, found here: https://planttalk.colostate.edu/wp-content/uploads/2024/04/2024-Front-Range-Tree-List.pdf. See page 10 of the trees not recommended.
You'll also want to avoid any plants on the Noxious Weed "watch list": https://ag.colorado.gov/conservation/noxious-weeds/species-id#d
In the CSU Extension fact sheets, plants labeled as "aggressive", "vigorous", or "spreading" may also indicate the potential to get invasive, especially if they are receive too much water. A great example is prairie winecups (Callirhoe). It's a great waterwise perennial, but if it's in a well-watered landscape, can spread aggressively. So as much as it is in the plant, appropriately watering and cultural conditions are also key.
