Trees

Arborday.org Tree Guide

Your source for accurate tree information.

Key to our Categories:


Mature Height
The average height of the species when it reaches maturity.

  • Under 24 Feet - ideal for planting near overhead utility lines because it matures below the pruning zone. Plant at least 8-10' from one-story building.
  • 25-49 Feet - should be planted at least 20 feet away from overhead utility lines. Plant at least 15' from one-story building.
  • 50-75 Feet - should be planted at least 50 feet away from overhead utility lines Plant at least 15' from one-story building.
  • Over 75 Feet - should be planted at least 50 feet away from overhead utility lines. Plant at least 20' from one-story building.


Mature Spread
Means the average width the species might achieve when it reaches maturity.

  • Small - ideal for narrow spaces
  • Medium - denotes an average spread
  • Wide - requires significant space


Sun
Refers to the sun/shade requirements best suited to the species.

  • Full Sun - shade intolerant
  • Partial Shade - intermediate shade tolerance
  • Full Shade - shade tolerant


Soil
The type(s) of soil for optimum growth. Kits & instruments are available from garden stores or forestry suppliers that allow you to determine the pH of your soil. Complete analysis including soil pH and the presence of nutrients can be done by commercial laboratories, your state agriculture university, or local arborists.

  • Acidic - low pH
  • Alkaline - high pH
  • Clay - smaller soil particles with wafer-like shapes, higher ability to hold water and nutrients
  • Loamy - combination of all particle sizes, with the desirable attributes of each
  • Moist
  • Sandy - largest soil particles with spherical and cubical shapes, better aerated and easier to work, but lowest water and nutrient holding abilities
  • Silty Loam - between clay and sand in particle size, spherical and cubical in shape
  • Well-drained
  • Wet
  • Wide Range
  • Drought Tolerant


Hardiness Zone
Means the area of the U.S. where the species can be expected to grow in the zone's temperature extremes, as determined by the lowest average annual temperature.

ZoneLowest Average Annual Temp. in Degrees Fahrenheit
Zone 2 -40 through -50
Zone 3-30 through -40
Zone 4-20 through -30
Zone 5-10 through -20
Zone 60 through -10
Zone 710 through 0
Zone 8 20 through 10
Zone 9 30 through 20
Zone 1040 through 30


Growth Rate
Means the average speed with which the species grows. Slow growing species typically live longer than fast growing species. [More about this.]

  • Slow
  • Medium Slow
  • Medium
  • Medium Fast
  • Fast


Type of Tree
Identifies trees by type.

  • Evergreen
  • Flowering
  • Fruit
  • Nut
  • Ornamental
  • Shade


Shape
means the typical shape of the species at maturity. If your planting site has space limitations you may want to select a columnar species. Round and v-shaped species provide the most shade.

  • Round
  • V-shaped
  • Oval
  • Prostrate
  • Columnar
  • Pyramidal


Info

May provide more information on the tree's attributes, wildlife value, history/lore, blooms, fruit, leaves and moisture requirements.


Purchase Info

links you to the arborday.org Tree Store for information on purchasing a tree from the Arbor Day Foundation.

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