En EspaŅol
Share

Ask Mr. Smarty Plants

Mr. Smarty Plants - Planting annuals around young oak in Evanston IL

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
Not Yet Rated

Saturday - July 30, 2011

From: Evanston, IL
Region: Midwest
Topic: Trees
Title: Planting annuals around young oak in Evanston IL
Answered by: Barbara Medford

QUESTION:

is it OK to plant annuals (i.e. salvias, impatiens or dusty millers) around the base of a young oak tree (2-3 years old)?

ANSWER:

Sure, it's okay, but you need to remember that the health of your oak tree is your first consideration, as it is much more valuable than annual plants. First of all, don't do your planting too close to the trunk of the tree-a couple feet out in all directions would be about right. We assume you are planning to put in bedding plants; be careful digging them in because you don't want to destroy any tree roots. You might want to mulch the plants to help hold moisture in and, as it decomposes, it will add organic matter to the soil. Do not get the mulch up against the tree trunk, this will encourage insects and fungi.

We gave you the good news, here is the bad news. Oaks are not happy to have competition in their territory. Your annuals will probably be all right for a while, because oaks develop this dislike for competition as they get older and larger. Just about everyone knows you can't plant anything under a black walnut tree, because the tree emits juglones, which are substances that damage other plants around the tree. Oak trees don't do juglones, but they are capable of allelopathy, and the substance they emit can be in the soil, the roots, the bark or the fallen leaves. If the plants you put in refuse to prosper, we would recommend planting somewhere else. If you continue to fight the tree's animosity for competition, you will just be wasting resources, and could even damage the tree in the process.

And, of course, as the tree grows larger, you need to consider the shade. Very few blooming plants will bloom well in shade. The bigger the tree, the more shade.

 

More Trees Questions

New growth on live oaks in Houston
September 27, 2011 - My 2 10yr. old live oaks are putting out new growth (branches?) although, here in Houston, TX we are having such a drought. For the last 3 months, I have conscientiously watered my entire yard via ...
view the full question and answer

Corkscrew willow damage to roof in Detroit, MI.
August 13, 2009 - I have a corkscrew willow (Detroit, MI) that is huge and whose branches hang on top of the asphalt shingles of my mobile home. It has now been discovered that these shingles, under the branches, are ...
view the full question and answer

Identificaation of different cultivars ofPrunus caroliniana
June 14, 2007 - How can you tell if you have a Carolina Cherry laurel or Carolina cherry laurel "compacta," or a Cherry Laurel-English? I have a line of four cherry laurels and one in the middle recently died an...
view the full question and answer

Injury from non-native Canary Palm from Torrance CA
October 18, 2013 - I got stuck in the eye a yr ago by a Phoenix canariensis. It went through my retina and through the integral chamber and put a stamp on my lense. There was no room for any more err without causing bli...
view the full question and answer

Why all the acorns from Austin
November 03, 2010 - What's the explanation for the huge crop of acorns falling from my live oak trees this fall. Do you recommend I dump them in my composter or just throw them in the flower beds? Thanking you in adv...
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