Suggested Density for Tree Plantings - Knowledgebase Question

Danville, Ca
Question by tasutak
August 13, 2006
I am considering two species for planting along a roadway that
borders my home. I'm hoping to achieve an evergreen screen for
privacy and would like to know the suggested density for each of
the species: First, Tristania Laurina and next, California Pepper.

How many feet apart should these trees be planted? I'm trying to not obstruct a mountain view so I want to limit the planting to one row only.

And one last question - in a different area where evergreen screening is not necessary, I would like to plant two rows of Crape Myrtles. What is the suggested density for this species?

Thank you in advance!!


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Answer from NGA
August 13, 2006

0

The easiest way to determine how to space trees or shrubs is to find their usual mature width and then space the plants far enough apart that the branches will touch (or overlap by a few feet). In the case of Tristania laurina, the average mature width is about 20'. So, if you plant them 15-20' apart they should have adequate room for growth, yet produce a dense screen. California Pepper typically grows between 20 and 40' in width (depending upon age and growing conditions. Based upon that, you can space the trees 15-20' apart so the tops will grow into one another. Crape Myrtles are so variable in size that it's hard to make a suggestion. But when you decide which cultivars to plant, take the average diameter of the canopy and space them so the branches barely touch when the trees are mature. This will give you an attractive looking planting without having the tree branches overwhelm one another.

Best wishes with your landscape!

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