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
2 ratings

Wednesday - September 01, 2010

From: North Richland Hills, TX
Region: Southwest
Topic: Transplants, Trees
Title: Soapberry tree problems in North Richland Hills, TX
Answered by: Barbara Medford

QUESTION:

We have a small grove of soapberry trees. The city recently reconstructed the street and added a side walk which now sets as close at 1 foot from the nearest tree. Everything seemed fine until they added about 6 inches of soil. Then, in less than 2 weeks, the tops of the trees have turned yellow and the bark seems to be changing colors in spots. A rapid decline. The city also planted new grass and comes along and waters it daily with a water truck. Are these trees goners are is there a chance to save them if I dig them back out? These are mature trees.

ANSWER:

Municipalities always reserve "right-of-way" on property on which they can place sidewalks, fill dirt, utility lines, whatever, without the permission of the owner. The addition of dirt must have had to do with leveling the grade after the sidewalk went in, and the grass is part of the project. Of course, any new planting needs to be watered, especially if it has been planted in the blazing Texas Summer, which we don't recommend.

According to this USDA Plant Profile map, Sapindus saponaria var. drummondii (western soapberry) grows natively in the area of Tarrant County, so it is planted appropriately. The good news ends there. Think about the part of the plant you can't see, which is the roots. Most woody plants will have roots in proportion to their height and width. Roots are vital for intake of moisture and oxygen to send up to the leaves to provide food to keep the tree going. Your tree roots are now covered by impermeable concrete and a layer of soil that is thick enough to be impermeable as far as your roots are concerned. The soapberry is a low water use tree, although its native habitat is  stream banks; wood margins; and rocky hillsides. That daily water spraying is good for the grass but bad in terms of water probably hitting the tree trunks, where it can cause fungal problems. Our uneducated guess is that the soapberry trees are not going to survive the invasion.

Can they be moved? Hopefully, you won't even try it now, at the first of a still-hot September. Woody plants should be planted or transplanted in late Fall or early Winter, when they are in dormancy. From our Native Plant Database page on this plant:

"Soapberry often suckers and form groves. Tolerant of drought, wind, heat, poor soil, air pollution and other city conditions."

What you have may not be "a" tree, but a suckering grove of trees.  To transplant, you will have to separate suckers from the main roots, hopefully with enough roots on each sucker to sustain the tree. A long, relatively narrow shovel with a sharp cutting edge. sometimes appropriately called a "sharpshooter," could be used to dig out those suckers, retaining roots directly from the sucker but cutting through the main root from the parent tree. Difficult, and no guarantee of survival.

Because the fruit of the soapberry is known to be poisonous, it is recommended that it be planted away from where childen would regularly contact the fruit, like a sidewalk.

It appears to us you have a "Catch 22" situation. The trees are probably not going to survive in the position where they are now, it is the wrong time of year to transplant, and transplanting would be difficult, plus they are a potential threat to passers-by, both from the possibility of slipping on the berries on the sidewalk and from the poisonous alkaloid saponins in the berries. To add to your decision, the dead plants (if they die) will have to be removed anyway. If you have a place and are willing to make the effort to relocate the trees, you might as well try it. 

From our Native Plant Database:


Sapindus saponaria var. drummondii

Sapindus saponaria var. drummondii

Sapindus saponaria var. drummondii

Sapindus saponaria var. drummondii

 

 

More Trees Questions

Shade-loving plants for birds in New Jersey
March 25, 2013 - What native plants should I add to my property, Zone 6, to feed birds naturally? I have a heavily treed lot, so I'd like names of shade loving perennials. Seed or fruit bearing options would be gre...
view the full question and answer

Transplant shock in tulip tree in Cincinnati
October 02, 2009 - I planted a tulip tree sapling (3 feet tall at the time of planting) in May of this year and it sprouted! Unfortunately, I believe the top portion (nearly 2 feet) did not make it (the sapling only spr...
view the full question and answer

Problems with non-native Callery Pear tree from Louisville KY
June 03, 2013 - I have a Cleveland select that has a bark issue. It is on its second season and I just saw this. It looks like the bark is bubbling up kinda and then wants to peel off the main trunk. I have a picture...
view the full question and answer

Evergreen sumacs for privacy along fence
August 02, 2014 - I would like to plant enough Evergreen Sumacs along our fence for privacy for the length of our backyard which is 60 ft. Fifteen feet on the left and right ends are shaded with the right side being d...
view the full question and answer

Will deer eat lemon cypress trees from Hayden ID
June 02, 2012 - Do deer eat lemon cypress trees? We do not think so since they are so spiny, but wanted a clarification.
view the full question and answer

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