Native Plants
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.
Did you know you can access the Native Plant Information Network with your web-enabled smartphone?
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.
rate this answer
Thursday - April 07, 2011
From: Hutto, TX
Region: Southwest
Topic: Non-Natives
Title: Planting a non-native rose on oak tree in Hutto TX
Answered by: Barbara Medford
QUESTION:
I would like to consider planting an earth-kind climbing rose on the south side of my 12 ft oak tree. Is this a good idea? Will I create problems?ANSWER:
We are not sure what you mean by an "earth-kind" rose. The Lady Bird Johnson Wildflower Center recommends only plants native not only to North America but to the area in which those plants grow natively. We need to point out that there is no such thing as a true "climbing" rose, in the terms of an ivy or honeysuckle that either has stick-tights or winding tendrils to help the vines grow. Rose have stiff canes, and to make them go up, they need to be tied to some sort of trellis or support. We don't know how this would work trying to take it up an oak tree. In the winter, roses being deciduous, you would just have long bare canes tied to a tree with no leaves, kind of pitiful.
Most roses need a good quantity of sunlight to fuel their blooms. We consider full sun to be 6 or more hours of sun a day, part shade 2 to 6 hours of sun, and shade less than 2 hours of sun a day.There are other factors besides heavy shade that might be causing problems in getting plants to stay alive, including the fact that oak roots tend to be in the upper 12 inches of the soil, and form a mat that would be discouraging to other plant roots. In addition, there is the question of allelopathy. From the University of California Cooperative Extension article Landscape Notes by James Downer, Farm Advisor, we have extracted this paragraph about the allelopathy of oaks:
"Various studies have demonstrated that oaks can have allelopathic affects on surrounding plants. Allelopathy is the production of plant inhibiting chemicals by one plant to regulate the growth of others in its vicinity. One important group of chemicals produced by oaks is tannins. They are produced in leaves and litter and also directly by root systems in soil. Tannins are inhibitory to many organisms. Salicylic acid and other organic acids are also produced by oaks and are toxic to other plants. Allelopathy is species specific for the oak in question and the species that is inhibited."
So, you get our drift-not many roses are native to North America, most are from China. The oak is not going to like having that rose under it, and the rose is not going to like having the shade of the oak. However, we will give you some roses native to Texas to look at; there is nothing to keep you from trying it if you want to. There are 9 members of the Rosa genus native to Texas, but only 2 seem to have the possibility of surviving in Williamson County. These are going to be "wild" roses, and it's unlikely you will find them in a nursery.
Rosa carolina (Carolina rose) - low, freely suckering rose, 1 to 3 ft. tall
Rosa setigera (Climbing prairie rose) - has canes 6 to 15 ft. long, which classify it as a climbing rose; it is mostly found growing on fences in East Texas.
From our Native Plant Image Gallery:
More Non-Natives Questions
Problems with non-native Chocolate Mimosa from Dallas
June 15, 2011 - I have a Chocolate Mimosa I planted last spring. It came back strong this spring but suddenly the leafs have started turning brown and falling off, it gets watered every morning and I don't have a c...
view the full question and answer
Privacy hedge for Burleson, TX.
April 09, 2013 - I moved out to the country away from the hustle and bustle only to find that I have less privacy out there because of open land. I hear children screaming and dogs barking from 1/4 mile away. I want t...
view the full question and answer
Problem with Chinese Pistache tree
September 01, 2014 - We have a gorgeous Chinese Pistache in our yard, about 25 feet tall. We bought it for its gorgeous fall color. The problem is that it has never turned color for us. All the other pistaches in the neig...
view the full question and answer
New house plant in pot in Chevy Chase MD
May 07, 2010 - Is it possible for one house plant to eventually die in the pot while a completely different plant grows in its place? The new plant looks similar to the potted plant next to it but it is not quite t...
view the full question and answer
Growth of non-native bermudagrass in Snelville GA
July 16, 2011 - How do you grow Bermuda grass successfully in the state of Georgia? Techniques in fertilization, lawn cutting and general maintenance. Thank you.
view the full question and answer
Support the Wildflower Center by Donating Online or Becoming a Member today. |