En EspaŅol

Q. Who is Mr. Smarty Plants?

A: There are those who suspect Wildflower Center volunteers are the culpable and capable culprits. Yet, others think staff members play some, albeit small, role. You can torture us with your plant questions, but we will never reveal the Green Guru's secret identity.

Help us grow by giving to the Plant Database Fund or by becoming a member

Did you know you can access the Native Plant Information Network with your web-enabled smartphone?

Share

Ask Mr. Smarty Plants

Ask Mr. Smarty Plants is a free service provided by the staff and volunteers at the Lady Bird Johnson Wildflower Center.

Search Smarty Plants
    
 
See a list of all Smarty Plants questions
Can't find the answer in our existing FAQs, submit a question to Mr. Smarty Plants.
Need help with plant identification, visit the plant identification page.
 
rate this answer
5 ratings

Sunday - February 07, 2010

From: Springfield, IL
Region: Select Region
Topic: Trees
Title: Why aren't all blue spruce trees blue?
Answered by: Janice Kvale

QUESTION:

I have been looking at blue spruce trees recently and I have noticed at a couple tree farms that not all blue spruce look blue at all. Some that are listed as Co. Blue Spruce are very green. The shape, the branches, and the needles are the same.......but the color is green as can be. Whats up with that?

ANSWER:

Not all Picea pungens (blue spruce), the state tree of Colorado and Utah, are blue. While some are quite blue in color, others have a silvery sheen to their coloration, and many native "blue" spruce are just plain fir-tree-green as you have observed. Regarding the blue spruce, naturalist and author Donald Culross Peattie who had a special interest in trees noted "These trees are not consistently powdered with that look of stage moonlight; they are predominately dark green, even somber, like most Spruces, with little blue about them, except for a brief season, the tips of the new growth, or here and there, a young specimen that is fairly azure all over."

Why is this so? For the same reason some humans have blue eyes and others have brown eyes: genetics. A fair amount of research on the blue spruce and its cultivars demonstrate the variations in color as well as size are dependent on the genetics of the trees. Other conifers, such as the Pseudotsuga menziesii (Douglas-fir), also carry a genetic tendency to be blue-green in color. Thanks for an interesting question.

 

Pseudotsuga menziesii

Pseudotsuga menziesii

Picea pungens
 

More Trees Questions

Vehicle friendly oak trees for Austin
March 30, 2008 - Do Chinquapins, Shumards or Live Oaks produce lots of tree sap? I'm looking for a vehicle friendly Oak tree to be installed in parking areas in Austin, Texas.
view the full question and answer

Growth rate of trees
August 20, 2007 - What is the growth rate of the following plants. (How wide and tall each year? They are all in 1 gallon pots right now.) 1. Agarita 2. Anacacho Orchid 3. Silk Tassel. Is there anything that can be ...
view the full question and answer

Trouble with Redbud in Illinois
March 13, 2010 - I have a red bud bush, we live in northern Illinois, it is shedding its bark. Is this normal or is the bush dying?
view the full question and answer

Spraying paint on White Pine tree trunks
October 31, 2011 - Is there a paint that is safe to spray on a tree trunk without damaging/killing the tree? We have White Pines that have ~16" spacing without limbs & would like to 'camouflage' the bare space. If pa...
view the full question and answer

Mexican Plum not doing well in Liberty Hill, TX.
September 03, 2010 - Two summers have passed since I planted my Mexican Plum. It's in full sun. It seems to have added height but not much width. It's virtually a 7 foot stick with 1 foot branches from top to bottom. It...
view the full question and answer

Smarty Plants's Facebook profile Support the Wildflower Center by Donating Online or Becoming a Member today.

Mr. Smarty Plants wants you to be his Facebook friend. Click the Facebook icon to add yourself to Mr. Smarty Plants list of friends.
E-NEWSLETTER | BECOME A MEMBER | DONATE NOW | MEDIA | SITEMAP
© 2014 Lady Bird Johnson Wildflower Center