Some of the easiest trees to grow and maintain in the United States include the American Elm, Red Maple, and Eastern White Pine. These trees are known for their resilience, adaptability, and minimal maintenance requirements.

The American Elm (Ulmus americana) is a popular choice due to its fast growth rate and ability to withstand urban environments. It is highly adaptable to various soil types and is known for its strong wood, which makes it suitable for construction. The Red Maple (Acer rubrum) is another excellent option, as it is drought-tolerant, has vibrant fall colors, and is relatively low-maintenance. The Eastern White Pine (Pinus strobus) is favored for its rapid growth and ability to tolerate a wide range of soil conditions, making it a great choice for windbreaks and privacy screens.

These trees are easy to grow and maintain because they have the following characteristics:

1. Adaptability: They can thrive in a variety of soil types and climates, making them suitable for many regions across the United States.

2. Disease Resistance: They are less prone to pests and diseases, which reduces the need for chemical treatments.

3. Low Maintenance: They require minimal pruning and watering once established, saving time and resources.

4. Fast Growth: They can grow quickly, providing shade and privacy in a relatively short period.

5. Aesthetic Appeal: They offer attractive foliage, flowers, and fruits, enhancing the beauty of any landscape.

According to the United States Department of Agriculture (USDA), the American Elm is one of the most popular trees in the country due to its versatility and durability. The Red Maple is also highly regarded for its aesthetic value and adaptability, with the USDA reporting that it is the most widely planted tree in the Eastern United States. The Eastern White Pine is recognized for its rapid growth and ability to improve air quality, with the Arbor Day Foundation noting that it is a favorite among homeowners and landscapers alike.

In conclusion, the American Elm, Red Maple, and Eastern White Pine are excellent choices for trees that are easy to grow and maintain in the United States. Their adaptability, disease resistance, low maintenance requirements, fast growth, and aesthetic appeal make them ideal for a wide range of landscapes and environments.