En Español

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

Please forgive us, but Mr. Smarty Plants has been overwhelmed by a flood of mail and must take a break for awhile to catch up. We hope to be accepting new questions again soon. Thank you!

Need help with plant identification, visit the plant identification page.

 
rate this answer
Not Yet Rated

Friday - May 10, 2013

From: Flushing, MI
Region: Midwest
Topic: Trees
Title: Fertilizing a Mature Mountain Ash
Answered by: Anne Van Nest

QUESTION:

What kind of fertilizer should I use on a mountain ash tree that is 25 years old (or more)?

ANSWER:

Congratulations on having a mountain ash that has reached a good mature age. Often mountain ash (Sorbus sp.) are short lived due to insects or diseases. The Yardener.com website has a good information sheet on caring for mountain ash that has good tips. Under fertilizing they say "Mountain ashes are not heavy feeders. They can survive nicely on minimal nutrition. However, it is a good idea to feed mountain ashes in the yard once a year. In the spring sprinkle a handful or two of a fertilizer on the soil under the tree out as far as the reach of its branches (the drip line). The rain will soak it in.” They also have information about fertilizing trees.

The International Society of Arboriculture (ISA) has a good information sheet for mature tree care on their website. They offer many preventative care suggestions and discuss mulching, pruning and fertilizer application.

The Michigan State University has diagnostic services and have posted an information sheet on fertilizing trees and shrubs on their website.

 

From the Image Gallery


American mountain ash
Sorbus americana

American mountain ash
Sorbus americana

More Trees Questions

Want a source for Mexican redbud in Houston, TX
October 04, 2010 - I live in west Houston and would like to purchase and plant a Mexican redbud in my yard. I have Googled to find one and also searched the Growit site without success. Where can I find one in Texas? I ...
view the full question and answer

More trees to go with live oaks in Schertz TX
July 13, 2010 - We moved to a new house that has two recently planted live oak trees. Other than those two little trees there is nothing else on the property. Because of what I read about the oak wilt I would like ...
view the full question and answer

Controlling oak suckers in Austin
January 26, 2012 - I live in Austin TX and have one particular native Oak tree in my back yard with a large bed around it. I don't plan on planting anything else in the bed since it is already nicely landscaped along ...
view the full question and answer

Sap of mulberry similar to sap of maple for syrup from Wellman IA
February 23, 2012 - Can the the sap of the mulberry tree be used to make syrup similar to maple Syrup?
view the full question and answer

Will the sea water from Hurricane Ike residually affect Galveston's soil
December 06, 2009 - Most of the trees on Galveston Island died following Hurricane Ike, apparently as a result of the sea water that covered the island. Will the sea water that soaked the soil have a residual effect on...
view the full question and answer

Support the Wildflower Center by Donating Online or Becoming a Member today.
E-NEWSLETTER | BECOME A MEMBER | DONATE NOW | MEDIA | JOBS | SITEMAP | STAFF INTRANET
© 2016 Lady Bird Johnson Wildflower Center