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Green news from the UC Division of Agriculture and Natural Resources
by Susie Kocher
on April 18, 2018 at 3:45 PM
I think this is really great and really important. Thanks for doing it.
by Paula Henson
on April 19, 2018 at 10:44 AM
Please use the botanical names of the trees--there are many species of Acacia!
by Seanain Snow
on April 20, 2018 at 9:58 AM
Ditto what Paula said!
by Janet Hartin
on April 27, 2018 at 1:24 PM
Hi all, I’ll post genus and species names tonight when I’m back at my computer
by janet
on April 27, 2018 at 3:14 PM
Acacia aneura (mulga) is included in both the coastal and inland trials discussed in Jeannette's blog. We are also looking more closely at mulch/no mulch treatments on four species from the larger study in partnership with Chino Basin Water Conservation District in Montclair. I have a power point if anyone would like to use it. Janet Hartin
by Mike Letteriello
on May 1, 2018 at 8:00 AM
I love many of the native trees on this list and I've planted them myself (especially I recommend the Island Oak of California) but it's a shame when I contemplate that we even have to cope with such rapid climate change. I don't know about the survival of the vegetation that requires more moisture; I've seen our seasonal creeks and streams dry up, and it could be really rough sledding, worse than now, for our plants and wild animals.
by Tracy
on May 2, 2018 at 10:14 AM
Inherited a common Hackberry more than 55 years old on a property that we purchased 11 years ago. large tree with swooping down turning branches withstands high temperatures and the Santa Anna winds Located in the San Fernando Valley suburb of Los Angeles 91306.
by Steven Barryte
on May 4, 2018 at 9:27 PM
In addition to drought, soil & wind tolerance information, when publishing results, please also include fire resistance information. Thanks.
by Gary Jones
on May 15, 2018 at 10:30 AM
Can you please provide the botanical names for all the trees? Acacia means nothing. Thanks!
by Tina Cremer
on May 16, 2018 at 10:41 AM
Please send the botanical names, CV, SSP and Species. Thank you for this study.
by Jacqueline Soule
on May 16, 2018 at 3:16 PM
I am sure you worked hard on this but it is entirely useless without the scientific names. There are over 15 trees called "ironwood."  
Furthermore if by "blue palo verde" you mean Parkinsonia florida then you have the wrong species in your image. And anyway, Parkinsonia X 'Desert Museum' is a far better choice of any Parkinsonia - being of hybrid origin it still blooms but doesn't litter with seeds. The one at the LA Natural History Museum is doing quite well.
by Jeannette E. Warnert
on June 11, 2018 at 3:29 PM
Received the following comment from Don Neumark,  
I'm surprised you didn't include in your street tree study the most drought resistant, insect resistant, fire resistant, tree of all ..... the Afghan Pine, commonly known as the Mondel Pine. One of the extra benefits of this tree is that it has a long central tap root making it ideal for street trees that won’t pick up the sidewalk and can be used on slopes to hold back soil from earth slippage. The long tap root can easily grow to 200 feet down to seek out a water source. It takes only 7 years to reach a height of 50 feet from a one foot planting container!
by Ellis
on August 8, 2018 at 5:44 PM
Glad 3 out of 4 of our trees are on the list. What about crape myrtles? They’re planted all over Santa Clarita and we have one as well.
by Stephanie Hernstadt
on August 29, 2018 at 8:47 PM
It's great you are doing this study. I concur the scientific names are very important to know.  
Two thoughts: The city of LA keeps taking down healthy established 50-80 year old Ficus trees that were planted last mid-century due to sidewalk uplift and the lawsuits they cause. The Ficus is a known entity as a street tree and has a mixed history, so why include it in your study?  
Also why NOT include the esteemed Coast Live Oak (Quercus agrifolia)? The CA native Coast Live Oak should be in more nurseries, and the leaf litter is good for the tree, so needs not to be cleaned up. Even with climate change native plants might fair better, and your research can at least see that out.
by Janet Hartin
on September 8, 2018 at 10:30 AM
Hi all, thanks so much for all the great comments! Many tree species that you've suggested are already 'tried and true." A major goal of our study was to look at less commonly planted species to add to the diversity of available species.  
by Lynn Rafac
on September 23, 2020 at 1:53 PM
September 23, 2020  
Dear Arborist,  
I am planning on planting several trees in my Santa Clarita Valley yard this fall.  
The area between house’s exterior wall and existing 5’ tall slump stone fence is 10‘10“. The yard is about 35 feet long.  
The trees will be exposed southern and western sun.  
The grass In that area is going to be replaced with crushed stone so there is maximum need for the trees to provide coolness as the grass does. Deciduous trees are fine as there is no need to shade the house in the winter. Well the way the climate is going maybe there should be shade.....  
It would be nice to have something pretty to look at out from the windows at the side of the house.  
Would you be willing to send me a list of wisest trees to use based on your studies so far?  
Thank you,  
Reply by Jeannette E. Warnert
on September 23, 2020 at 2:00 PM
The UC Master Gardener Program in your county can help you select trees. I suggest you follow this link and find the program nearest you. Best, Jeannette
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