State Tree of Wyoming and How to Grow It

Ralph Astley is a retired gardener from Philadelphia who specializes in outdoor plants and trees. With years of hands-on experience, Ralph not only cares for a diverse range of outdoor flora but also shares his extensive knowledge through well-written articles and social media posts. A trusted authority in arboriculture, he's committed to helping the community grow healthier, more robust gardens.
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Do you know what is the State Tree of Wyoming? We have all the information for you to grow it easily in your garden!

Every year, millions worldwide travel to Wyoming to explore its seven wonderful national parks, including the iconic Old Faithful Geyser, Yellowstone, the largest hot spring in America, and the State Tree of Wyoming! Let’s know more about it!

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State Tree of Wyoming

  • Wyoming, in 1947, adopted the Cottonwood as its official State Tree.
  • In 1961, the statute was amended to change the scientific name to Populus deltoides Variety Monilifera. 
  • The State Tree of Wyoming is native to the Rocky Mountains and the Great Plains and is also the fastest-growing tree in North America.
  • It can live for about 100-120 years and grow up to 80-100 feet tall on maturity. 
  • The State Tree of Wyoming derived its name from the mass of hair surrounding its seeds. 
  • With stunning triangular leaves, The State Tree of Wyoming creates a soothing sound in the breeze. It takes a gorgeous bright yellow shade in the fall. 

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How to Grow the State Tree of Wyoming?


The State Tree of Wyoming thrives best in full sunlight, so pick a spot with a minimum of 5-6 hours of bright sun every day. Good sunlight will ensure you enjoy the vibrant gold shade in the autumn. 

Best Soil

Although this tree loves evenly moist soil with excellent drainage, it can adapt to almost any soil once it is established. 

How to Water 

The tree loves ample water, particularly when young. Once the tree establishes itself, you don’t have to worry about watering it. 


Feed the plant with a balanced liquid fertlizer once a month until it grows to about 4-5 feet tall. After that, it will take care of its own.


Pruning the Cottonwood tree may be one of the most important works. Cut away the weak, damaged, or crotched branches from time to time. Regular pruning will help to strengthen the branches.

Pests and Disease Problems

Watch for borers, aphids, scales, mealybugs, caterpillars, and leaf beetles. Use insecticidal soap spray or horticultural oil to keep it safe from these pests when it is young.
One of the common diseases is the cytospora canker, and this fungus weakens the tree. 

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