Host an Event Volunteer Join Tickets

Support the plant database you love!

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
1 rating

Sunday - May 25, 2008

From: Yorkshire , England
Region: Other
Topic: Seeds and Seeding, Trees
Title: Mountain ash seedlings in Yorkshire, England
Answered by: Barbara Medford

QUESTION:

Is there any way I can stop Mountain Ash from seeding in my garden. This year in particular, I am absolutely overrun with the seedlings and once they get a hold they are difficult to remove.

ANSWER:

First, how nice to hear from someone in England. We may not be much help to you as the Lady Bird Johnson Wildflower Center is dedicated to the care and preservation of plants native to North America. So, we're going to suggest you follow the same practice of using plants native to your area. Regardless of where that is, native plants will always do better with less maintenance because they are already adapted to the area and have developed survival techniques over the millennia. However, we are gardeners, too, and are always happy to talk about plants, so we'll see what we can find out for you.

Searching for "Mountain Ash", we first discovered that there is one in our Native Plant Database, Fraxinus texensis (Texas ash) . It is a member of the Oleaceae (Olive) family, and its native distribution is Central (where Austin is) and North Central Texas. We're pretty sure that's not what you have. Next, we found out that in Australia many common eucalyptus trees are referred to as "ash" and that the best-known of these is the "Mountain Ash," the tallest broadleaf tree in the world. That's probably not what you have, either. We found that the European common ash is Fraxenis excelsior, also in the Oleaceae family. Sorbus aucuparia, an European native sometimes called a mountain ash, is most often referred to in the UK as a Rowan or Whitebeam, except that in the UK it's referred to as Pyrus aucuparia. These last two are both in the Rosaceae (rose) family, and most likely are what you have.

We went through all this exercise hoping to narrow down what tree you have so that we could help you determine a way to eliminate the seedlings in your garden. And, guess what? It's just the same as any other tree, although perhaps more prolific. Any herbicide you tried to use on those seedlings would only harm other valuable plants in your garden, including the mother tree. They may be actual seedlings or they may be sprouts from roots, or both. If you remove the flower before it seeds, that would at least cut down on the seeds on the ground, but in a tree, that could be a challenge. Keeping the ground raked and clear, taking away the seeds, during the season will certainly eliminate a lot. But whatever seeds do manage to sprout and any sprouts from roots will still have to be dealt with the old-fashioned way, pull them out. And the sooner you catch them, as you already noted, the easier they are to get out. If they are falling in grass, mowing closely during the seeding season would at least slow them down, but if they are falling in planted beds, even that is out. We wish there were a magic spell we could offer you, because we would be using it ourselves.

 

More Trees Questions

Failure of Bald Cypress to fully leaf out
April 14, 2008 - My family just moved to a house in Burnet County, about 7 miles south of Bertram, close to the Balcones Canyonlands NWR, with very rocky limestone soil. We bought several trees last fall, including a ...
view the full question and answer

Average lifespan of Pinchot's Juniper from Golden CO
August 23, 2011 - What is the average lifespan of Juniperus coahuilensis (syn. Juniperus texensis) trees?
view the full question and answer

Removal of Ashe juniper trees
April 19, 2015 - I have 15 acres with scattered huge oak and elm trees with tens of thousands of Ashe Juniper (cedar) trees 2 to 10 in diameter growing within the drip zone of the hardwoods. How do I take out the c...
view the full question and answer

Digging sassafras roots in Oklahoma
March 11, 2009 - When should I dig sassafras roots in eastern Oklahoma?
view the full question and answer

Need help with a Pecan tree that has been topped in Austin, TX.
July 06, 2010 - Hi Mr. Smarty Plants! I have a pecan tree on my property that was topped by the previous owners. I have searched high and low for information on how to correctly prune a tree that has already been ...
view the full question and answer

Support the Wildflower Center by Donating Online or Becoming a Member today.