Rent Shop Volunteer Join

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

Saturday - September 20, 2008

From: Ojai, CA
Region: California
Topic: Compost and Mulch, Transplants, Shrubs, Trees
Title: Living fence of native plants for Ojai, CA
Answered by: Barbara Medford

QUESTION:

I would like to build a "green fence" about 10-15 feet tall. I live in Ojai, CA where we have VERY hot summers and it goes below freezing every winter. The soil does not seem to drain well..it is extremely hard. We have Acacia trees on the South side of our house right now (where we want the green fence) and we plan to take a few out as they have grown erratically. Otherwise the Acacias on our property are thriving. The "green fence" would have partial shade because the two Acacias that we are planning on leaving are probably about 30' tall, BUT there is a chance we may remove them in the future because we heard that they can be problems if too close to houses. I have already installed drip but I prefer drought tolerant plants to conserve on water. We would like this "fence" to become a major source of privacy, to be tolerant in all aspects (bugs, frost, shearing, etc.)and fast growing. It would be nice if it had something edible by humans or even to birds but this is actually last on my list of "musts". Thank you so much for your time.

ANSWER:

Let's address the acacias first, as you may be making the decision to remove some of them. There are two acacias native to California; most of them are native to Texas only, or Texas and New Mexico. The reason for this is that we are already used to having vicious thorns, sometimes hooked spines, that tear at clothes and person. Acacia farnesiana (sweet acacia) can grow to 15', and Acacia greggii (catclaw acacia) is usually a mounded shrub to about 5' tall, with the worst thorns, which are blamed for making it the most despised shrub in the Southwest.  So, while we are glad some of the ones you have are doing well, we certainly wouldn't recommend planting any more, unless you're landscaping Sleeping Beauty's castle.

On to the soil which does not drain well. We are going to suggest shrubs or small trees that will tolerate a clay soil, which is usually the culprit in poor drainage. However, since you really shouldn't attempt to plant your hedge until after the last freeze date for your area in Winter, that will give you time to amend that soil a bit. Digging a long trench where the "fence" is going to go and mixing in compost, leaf mold or some other organic material with the native soil will not only go a long way toward improving the drainage, but should make digging the holes for the plants easier when the time comes. Add more organic material as you plant, and mulch with a shredded hardwood mulch, to shelter the roots from cold and heat, and help hold moisture in. The mulch will continue to decompose and add to the improved texture of the soil. 

We are going to go to our section on Recommended Species, click the map on Southern California and Narrow Our Search on Habit of Shrub and Tree, although we only found one tree of acceptable height, and look for appropriate plants that are adaptable to clay soils. We are a little puzzled about your temperatures going below freezing every Winter, since you are almost on the Pacific Coast and pretty far south, unless you actually are located in some of the mountains above Ojai Valley. We'll take your word for it. We chose only evergreen plants, since you are looking for privacy, summer and winter, and also looked for plants that could take lots of sun but tolerate some shade and not very good, dry soil. Read the webpage that is linked to the plant name, and for more information, you can go down to the bottom of that webpage, and click on a link that will take you to a Google search on that plant. You will then be prepared to make your own decision based on habit, projected height, etc. 

SHRUBS

Arctostaphylos manzanita (whiteleaf manzanita) - 6 to 12', generally branch or fork near ground, pictures

Carpenteria californica (tree anemone) - 4 to 8' 

Ceanothus impressus (Santa Barbara ceanothus) - 6 to 8'

Heteromeles arbutifolia (toyon) - can grow 15 to 20', bright red berries

Juniperus californica (California juniper) - 10 to 15, pictures

Morella californica (California wax myrtle) - densely bushy, 10-25', aromatic leaves, attracts birds, pictures

TREE

Cercocarpus montanus var. glaber (birchleaf mountain mahogany)

When you have made some selections, you can go to our Native Plant Suppliers section, type your town and state in the Enter Search Location box, and you will get a list of native plant nurseries, seed companies and landscape consultants in your general area. 


Carpenteria californica

Ceanothus impressus

Heteromeles arbutifolia

Cercocarpus montanus var. glaber

 

 

 

 

 

More Shrubs Questions

Shaping cenizo in Duncanville TX
October 02, 2009 - Our Silverado Sage, which we expected to be 4' to 5' high and wide based on the label when we purchased it about 10 years ago, is nearly 7' tall and very random in shape (not the evenly rounded sha...
view the full question and answer

Colorful shrubs for Kansas
June 02, 2009 - I would like to plant some bushes or shrubs on the front side of our house which faces east. I would like them to grow 5' tall and provide beautiful color or blooms. What would be best for my locat...
view the full question and answer

Blooming challenges with oakleaf hydrangea and bittersweet vine in KY
October 03, 2010 - 1. I cut back my oak leaf hydrangea last fall and it did not bloom this past year. Problem? 2. I have 3 yr old male/female bittersweet plants growing heartily, but no berries. Problem? Thank you!
view the full question and answer

Request for seeds or cuttings for Malvaceae from French Botanical Garden
September 03, 2011 - hello We create a botanical garden devoted to the Malvaceae, can you help us by sending us seeds or cuttings? friendly the director jean-marie Jolicard botanical garden beaulieu 23170 LÚpaud F...
view the full question and answer

Garden problems from Centreville VA
July 23, 2011 - Plants die, trees won't grow. I've replaced the soil (6") twice. Replaced grass twice and planted new plants and tree. After two yrs, the tree is still the same size and the flowering bushes nea...
view the full question and answer

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