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
1 rating

Monday - May 20, 2013

From: San Antonio, TX
Region: Southwest
Topic: Planting, Trees
Title: Rock under space for Bigtooth Maple in San Antonio
Answered by: Barbara Medford

QUESTION:

I just got a 10 gallon Bigtooth Maple in Medina TX for my home outside loop 1604 in San Antonio. I hit rock about 7 inches in when trying to plant it..I am entertaining the idea for a raised bed to level the last 6 or so inches. Is this even with it or is it a lost cause?

ANSWER:

Okay, we have more than one problem here. The first one is that you will be planting in what is quickly becoming very hot weather. We ordinarily recommend that in Texas and other hot areas woody plants, that is, trees and shrubs, be planted in November to January. So, whatever you do, that baby needs to get into the ground quickly. Here are the growing conditions for Acer grandidentatum (Bigtooth maple) from our webpage on the plant.

"Growing Conditions

Water Use: Medium
Light Requirement: Sun
Soil Moisture: Moist
CaCO3 Tolerance: None
Cold Tolerant: yes
Heat Tolerant: yes
Soil Description: Moist soils, Limestone-based, Sandy, Sandy Loam, Medium Loam, Clay Loam, Clay, Calcareous."

"Limestone-based" means alkaline soil that has developed from limestone, not a solid chunk of limestone. We did considerable research on the type of roots maples have and one of the outstanding points is that the roots are far-reaching and shallow. In fact, maples are often not recommended because those roots come to the surface, heave up sidewalks and punch holes in basement walls. Frankly, in maple tree vs. chunk of rock, we're betting on the maple.

Ordinarily, we would not have suggested you plant a tree in such shallow soil, but since you already have the tree, we think you should dig as deep and wide a hole as is practical, preferably away from pavement, foundations, patios, etc. We assume that the root is still in the pot in dirt. Put the tree root over the rock and kind of let it spread out. Refill the hole with a mix of native soil and compost to give the little hair-like rootlets something from which they can access nutrients and water. We are not confident that such a shallow hole is going to stabilize the tree until it gets some of those roots out, so you should probably stake it.

Remember from the Growing Conditions, this plant likes moist soil, which you probably don't have in Bexar County. As soon as the tree is in the hole and staked, stick a hose down in the soil loosened by the addition of compost, and let the water just drip until the surface is wet. Do that 2 or 3 times a week until cooler weather or more rain.

The tree could still die of transplant shock because you are planting it in hot weather or because too much root damage has been done getting it into the hole, but at least you will give it a fighting chance.

 

From the Image Gallery


Bigtooth maple
Acer grandidentatum

Bigtooth maple
Acer grandidentatum

Bigtooth maple
Acer grandidentatum

More Planting Questions

Information about blackleaf elderberry
July 03, 2008 - I was given a blackleaf elderberry. Do I plant this tree in shade or sun? Also, does it require a lot of moisture? Thank you.
view the full question and answer

Grasses for a prairie in southeast Texas
September 30, 2013 - We have a small place (about 100 acres) in Colorado County, Texas, on the Colorado River north of the town of Weimar. We are gradually clearing (bulldozing) the woods of cedars. One particular spot ...
view the full question and answer

Need plants to control erosion on a hillside in Nashville, TN.
February 28, 2012 - Recently, a rogue contractor scraped all the sod off of my Tennessee hillside. Now the clay soil is exposed and washing away quickly. The hill slope is approximately 30 degrees. In the spring I'd ...
view the full question and answer

Transplant shock in Chinkapin oak from Copperas Cove TX
June 18, 2012 - I have a newly planted chinkapin oak, appx 14' tall, in the Copperas Cove TX area. It has done great for the first two weeks. Now the leaves are yellowing (June) and beginning to dry up. I water it ...
view the full question and answer

Native plants for shade in Ennis TX
August 26, 2011 - My house faces south. The southwest side of the front yard has a Pride of Houston, Japanese Barberry, 2 crape myrtles and some dwarf yaupon hollies. The other section, divided by a stairway to the p...
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 | STAFF
© 2015 Lady Bird Johnson Wildflower Center