Wednesday, July 19, 2017

What Is There To Do and See at the L.A. County Arboretum & Botanic Garden When it’s really Hot?

It’s Summer here at the Arboretum. This time of year can be hot -we just had some pretty healthy 105 degree plus days. Besides slathering on sunscreen, wearing cool clothing, carrying (and drinking) plenty of water and fluids,  and wearing a hat or carrying a sun blocking umbrella, what can you do to really enjoy your day here besides the usual survival 101 skills?

Plan to visit areas that are shady and cool!  We have compiled a list of the 7 coolest places in the Arboretum so that you don’t have to wait for cooler weather to visit. So here are the 7 coolest places in the Arboretum, from furthest to closest:

1. Meyberg Falls
2. The Historic Section
3. The Bamboo Grove
4. The Tropical Rainforest
5. The Tropical Greenhouse
6. The Celebration Garden
7. The Arboretum Library

Let’s take a look.

Meyberg Falls 

Meyberg Falls

On just about any day here at the Arboretum you can find a dozen or more people hanging out here. Besides visitors, it’s popular with wedding photographers, music video producers and feature film makers. Katy Perry’s ‘Roar’ Video, Beyonce’s ‘Survivor’ video and the Rock video scene in “Wayne’s World” were just some of the many that were filmed there.
Lucky Baldwin's Queen Anne Cottage

The Historic Section

When San Francisco hotelier and millionaire Lucky Baldwin decided to invest in property here in the L.A. area, the Santa Anita ranch was one of the first purchases he made. Lucky’s ranch was surrounded by dry communities, so alcohol, gaming and horse racing were regular activities. To raise his ranch’s status above that of a mere roadhouse he featured fine varietal wines, a first class hotel, and to attract a higher class of clientele, authors, actors, opera singers and other celebrities of the day as featured guests. These celebs would stay at Lucky’s Queen Anne Cottage and give lectures, recitals and concerts to attract the staid citizens of the surrounding towns.

This historic section of the Arboretum is planted with many large trees, many over 100 years old, that provide shade -and a large lawn that is popular with weddings and other events.

Shady path through a bamboo grove here. 

The Bamboo Grove

The Arboretum has many exemplary collections, including over 60 different species of bamboo. Some of these bamboo, like Phyllostachys aurea, have formed dense and shady groves where you can duck in and avoid the sun in a cool, green forests of the grassy plants. The interiors of these groves can resemble green caverns and they are very popular with videographers, photographers and artists. A word of warning; be careful of the many small, stake-like stumps that can pose a tripping hazard.
The Tropical Rainforest

The Tropical Rainforest

Situated on the North side of Baldwin lake, the Tropical Rainforest is an area that represents the forests of the tropics and subtropics. Situated under tall Cypress trees from the American South and Mexico, this shaded paradise contains a collection of cycads, a grove of bamboo, and a disparate collection of tropical trees from around the world. There are several benches located in the forest, making it the perfect place to sit down and relax.
Inside the Tropical Greenhouse

The Tropical Greenhouse

When the weather is boiling hot the Tropical Greenhouse, located to the North of the main entrance, is not. That’s because it is usually kept to a constant temperature somewhere around 85 degrees -a relative ice box when the temperature is hovering around 105. Inside are orchids, ferns, bromeliads and even a Cocoa tree, the source of chocolate.

Small courtyard fountain in the Demonstration Garden. 
Top of the Weeping Fountain in Lew Watanabe's meditation garden vignette in the Demonstration Garden. 

The Celebration Garden

This area is a cool collection of shaded ‘vignette’ gardens that used to make up the Sunset demonstration garden, an area originally envisioned in the envisioned as being a demonstration and an inspiration to do-it-yourself landscapers. It’s last refurbishing, back in 1998, featured vignettes from cutting edge landscape architects and designers. Still visible today are a shady lawn garden, a courtyard fountain garden, a low water use deck area that uses synthetic recycled deck elements, a California native garden that uses polished granite as a faux stream, a shaded walk among California coastal redwoods and Canary Island pines, and finally a traditional Japanese meditation garden fashioned by the late Sierra Madre garden designer Lew Watanabe. Lew’s garden contains an example of his signature ‘weeping wall’ fountains, granite sculptures that are painstakingly made level so that the water pumped out the top covers the top and side of the fountain with a thin film of flowing water.

The Arboretum Horticultural Library

The Arboretum Horticultural Library

One of the finest collections of horticultural and botanical texts on the west coast, it is also a fine example of mid-century modern architecture.

A recent remodel has rendered its interior space true to its mid-century roots. Come inside and see the newly revealed vaulted ceiling, true-to-period lamps and furniture and spacious, yet less claustrophobic book shelving. Say 'Hi' to myself and librarian Susan Eubank. And, most importantly, enjoy the massively effective air conditioning.

Map to the Above Locations

Tuesday, July 18, 2017

I Go To a Friend's House to Settle an Argument and End Up Giving Them Way More Grief Than Even I Expected

I went to a friends house for lunch to check out a tree. The situation was that he and his wife had a little disagreement about whether or not a branch should be cut from it. I wasn't looking forward to being in the middle of a spousal disagreement but I knew my friend and his wife and didn't think it would be a big thing. The tree in  question is a California pepper (Schinus molle). The trees common name is a misnomer, as it is native to Peru. If the number of questions I receive about it is any clue, it is one of the most problematic trees in Southern California as well as one of the most popular. Since before the turn of the century, and maybe even since the early 1800's, these trees have graced ranchos and farms here. Unfortunately they can be very short lived if they are watered too frequently, sometimes only 40 years before rot starts causing large limbs to fall off.

My friend's California pepper tree. 

At first glance my friends tree seemed fine. It was just over five years old and had a large canopy, probably 30-40 feet wide, and the canopy was lush and luxuriant. The branch in question could have been pruned off or left as is, so I didn't have to take sides in my friend and his wife's argument. But there was something else...

I first noticed that some string lighting that had been placed on the tree was cutting into the trunk, so I mentioned it should be removed. Secondly, the tree was in a lawn, California pepper trees should not be planted in lawns, nor should lawns be planted around them. I then noticed something far more serious: the tree had a defect that could not be resolved and would result in my recommending the tree be removed.

Looking at the base I noticed a problem that has no happy ending -the trunk was an even diameter from about 8 feet up to where it entered the soil. It had no flair. Lack of any flair at the base of the trunk generally means that the tree is doomed to failure way before its time. It is caused by planting a tree that is rootbound. This sets up a situation where the trees own roots literally strangle the tree's trunk, preventing it from growing wide at its base. This messes with the fundamental physics of the tree.

Trees need a flaring base so that the roots coming from the base can form a 'plate' under the ground that  helps support the tree. This is so the center of gravity of the tree is always above the roots that are supporting it. If the center of gravity is allowed to lean over that support and becomes positioned over soil where their are no large roots to provide a surface for the tree's weight to act on it through the force of friction, then there is nothing keeping that tree up and it fails.

Now add to that the effect that the much narrower than normal trunk has on the tree -it raises its center of gravity. So where a normal tree would have a center of gravity that's maybe about a normal person's shoulder height it instead has a center of gravity located up in the canopy of the tree so that it is much easier for the wind to push the tree's center of gravity over the supporting root area and cause the tree to fail. The tree is basically too top heavy.

But that was not all, it was also showing signs of imminent failure. The tree had a noticeable lean and opposite the lean a mound had developed adjacent to the tree. This may indicate that the tree is already starting to fail; the weight of the tree could be pulling these vitally important supporting roots straight out of the ground.

So my recommendation was, unfortunately, to remove the tree and either plant a new one or choose another type of tree and plant that instead. In my next blog entry I will discuss some of my favorite trees for backyard shade, so stay tuned.

Also notice the tree is leaning to the left. 

Even When It's Hot It Looks Good Here

Pancratium maritimum, the Sea daffodil. 

Eucalyptus maculata hybrids

Pancratium maritimum, the Sea daffodil. 

Mushrooms in Summer: probably Lepiota

White and blue Agapanthus blooming with 'Red Riding Hood' Aloe

South African Gazania blooming in the Crescent garden. 

Tuesday, July 11, 2017

Strange Barrel Like Eggs on Bladderpod Leaves.

I got a call today from my future Arboretum YouTube channel co-host and Crescent Garden manager artist Leigh Adams. She was all excited about a very interesting looking grouping of insect eggs she had found. 

Strange looking eggs. 
After much searching I finally found out what they were: Harlequin bug eggs. Here's the kicker -one of the most effective ways to control this bug is to destroy the eggs. That's tough because they look so cool. 

Saturday, July 8, 2017

July 8th In the Garden

There are quite a few blooms out there now, even in the 105 degree heat.
Bamboo Shoot

Brachychiton blooming. 

Agapanthus blooms. 

View from the cafe. 

African Acacia tree. 

Drip wall. 

Jacaranda blooms. 

Sansevaria in the green house. 

Queensland bottle trees

Water conservation garden. 

Water conservation garden. 

California pepper tree. 

Thursday, June 29, 2017

Last Daze of June

Crepe myrtles  are blooming now. 

Tipu tree shadow. 

Meyberg falls. 

Kallam garden, from the west entrance. 

Verbascum blooming in the Kallam garden. 

Kallam garden. 

Mimosa tree blooming in the north Meadowbrook section. 


Wednesday, May 24, 2017

Cool Pix I've Taken Here at the Arboretum 5-2017

Enjoy these pix I took over the last several weeks. Here is a map to get you to where these things are:

White, single petaled rose bush in front of the Rose Garden. 

Bottom: Matilija Poppy Top: Flowering California Buckeye

Cloudy day after the rain. 
Euphorbia resinifera contains a compound, resiniferatoxin, that is 16 Billion on the Scoveville scale of hotness. It can induce pain relief because its action kills nerve endings that produce pain. 

The Canary Island exhibit. 

Large patch of Aeonium growing under a Dragon palm in the Canary Islands exhibit. 

Asteriscus maritimis, commonly called the 'Gold Coin' flower, located in the Canary Island exhibit. 

The trail to the Zen deck located in the Meadowbrook section of the Arboretum. 

Wednesday, April 19, 2017

La Verne Resident Suffers from Redwood Blues

Q. I spoke with you about a week ago on the phone regarding some declining sequoia trees in La Verne. You were kind enough to offer your help by reviewing a few things. You  requested I send you pictures, watering information and treatment information. The pictures are attached and the watering and treatment information is below. The trees were planted in late 2008/early 2009.


The trees are watered 7.1 MIN 4 Start times 2 days a week the sprinkler is a spray head. It was changed out about 6 months ago to the sprayers. Previously it was bubblers.

The sequoias/redwoods trees were treated on 2/29/16, 3/25/16, 5/6/16, 5/27/16 and 7/1/16 and the service was suspended in August. Each service was a deep root injection with the following chemicals/fertilizers:

Companion 2-3-2 high rate
Essential plus 1-0-1 high rate
PH reducer high rate
Arbor care 15-8-4
Iron max 6%

A. From what I can see your redwoods are not doing badly; considering they are growing in an environment that is not conducive to their growth  (that is, anyplace that is not the central and northern California coastal region) . There are some problems however:

1.       Their skirts are hiked up. Redwoods, especially those growing in inland areas, prefer not to trimmed at all during their lifetimes. The‘skirts’ are those branches which hang down to the ground. They provide both a humid environment underneath the tree that allows for a more gradual shift in moisture of the root zone between irrigations and protection from bark chewing deer. They also prevent people from holding activities in the very sensitive root zone of the trees that could damage them.
2.       They’re suffering from compulsiveness. Redwoods prefer a deep layer of their own refuse (needles, bark etc.) that they produce over their lifetime. This thick layer of spongy organic material provides for an even more gradual drying out of the important ‘root zone’ soil underneath the trees. The redwood has particularly shallow roots so this, along with the protective skirt, creates a growing zone for the tree that is necessary for it to survive. Also, the breakdown product of this needle and bark layer is beneficial to those organisms in the soil that are beneficial to the tree. Removing the needles from the trees (or planting a lawn under them) can be a death sentence.

So what can you do?  Do not trim your redwoods. Also, until they can produce a layer of their own mulch, put down a six-inch-thick layer of small fir bark or gorilla hair fir bark in an area that represents their eventual canopies.
Start changing the water schedule gradually to once a week for 20-40 minutes (remember you changed from a bubbler (good) to sprinklers (not so good)).  Do not feed them, and remove either the lawn or the tree in it as redwoods and lawns are not compatible in your situation.  And of course, limit any traffic under the redwoods.

Feel free to contact me if you have any other questions.

Cheers,  Frank

Wednesday, April 12, 2017

Out and About at the Arboretum

Things are looking good. 
Canary Island exhibit. 

Asteriscus maritimus (Gold Coin Daisy)

Aloe section

Ceiba insignis

Around the peacock cafe