How Wide Do Tree Roots Spread?

“Most tree roots…occupy an area two to four times the diameter of the crown.” – Colorado State University Extension “Roots may occupy an area four to seven times the surface area occupied by the crown of the tree.” – Iowa State University Forestry Extension “While one rule of limb has been that a tree’s roots are one… More

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Top 10 Takeaways: International Society of Arboriculture Conference

Last month we shared a “To 10 Takeaways” blog post about the Soil in the City conference earlier this summer. Today we’re sharing the Top 10s of another conference – the International Society of Arboriculture, held in Milwaukee, WI from August 2nd to August 6th – again compiled by L. Peter MacDonagh, FASLA. This list is a… More

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What’s the Difference Between Urban Soil and Forest Soil?

You don’t need much experience in arboriculture or landscape design to notice that planting trees in cities is very different from planting trees in forest environments. There are many reasons for this, but perhaps the biggest is the difference in composition of the soil.

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