Luther Burbank Experiment Farm

We have passed this historic farm numerous times. I was giddy that we finally had the chance to stop and explore.

In 1885, Luther Burbank bought land in Sebastopol and for the next forty years conducted his large-scale plant experiments on these 18 acres.
After his death in 1927, his wife leased the property to Stark Brothers Nursery until 1957. In 1973, she sold the property, which shortly thereafter began to be developed into a housing complex.
After decades of neglect, Burbank’s experiment grounds were overgrown with blackberries and poison oak. As the weeds were cleared out, rows of unusual plants appeared. These mature plants, in north-south rows, are the remains of Luther Burbank’s experiments.
It was here that the famed horticulturist conducted plant-breeding experiments that brought him world fame. One of Burbank’s goals was to increase the world’s food supply by manipulating the characteristics of plants. Burbank developed an improved spineless cactus which could provide forage for livestock in desert regions. During his career, Burbank introduced more than 800 new varieties of plants — including over 200 varieties of fruits, many vegetables, nuts and grains, and hundreds of ornamental flowers. He developed many of California’s plums and prunes, the ancestor of the Idaho Potato, the Shasta Daisy, and novelties such as plumcots, and the thornless blackberry.
We began our explore armed with a map. We were intrigued by the plants marked with an asterisk because those are Burbank's original plantings on the property, prior to restoration.  Steve stands before #1 Royal Hybrid Black Walnut. This Burbank introduction (1893) is a hybrid of California black walnut and eastern walnut. The oldest tree on the Farm (1885), it was planted as a “witness tree,” a property line marker. This variety is a heavy producer.
#7 Van Deman Quince.  A popular Burbank hybrid introduced in 1893. Fruit is squat, pear-shaped, fuzzy and delicious when fully ripened and cooked. Named for Dr. H. E. Van Deman of the USDA. 

# 6 Paradox Walnut. Introduced in 1893. (North twin) Burbank developed this fast-growing lumber tree (it requires only 15 years to mature instead of the usual 50 to 60 years) by hybridizing the English walnut with the California black walnut. It is commonly used today as rootstock.
#27 Black Locust. Fast-growing hybrids developed by Burbank for use of its leaves and seed pods as cattle fodder. Note: European Mistletoe that has colonized here. It is a semi parasite purposely introduced by Burbank for reasons known only to him.
Okay, this description made me laugh. #26 Trifoliate Orange. Viciously thorny trees from China. Hardy to 15 below zero F; used by Burbank in his (unsuccessful) experiments to develop cold-hardy citrus. Fuzzy fruits have about the same size, hardness and juiciness as golf balls.
#5 Chestnut.  Burbank developed hybrid chestnuts from European, Japanese and Chinese species to increase their resistance to chestnut blight. This tree produces abundant crops of tasty, burr-covered nuts that are prized both by squirrels and humans.
#10 Burbank Hybrid Fruit Trees. This contemporary orchard is composed of Burbank hybrid plums, pears, peaches, and apples. Also, plumcots (plum-apricot hybrids, introduced in 1914). Tags identify the different grafted branches.


One of my favorite Burbank creations is the Shasta Daisy. Just how did he do it? As a child in his native Massachusetts, Luther Burbank had a great fondness for the wild daisies that grew under the elm in front of his family home. These oxeye daisies had naturalized throughout New England, having been introduced accidentally from England by the Pilgrims.
The young plant-breeder was inspired to develop these wildflowers for use as garden flowers, and envisioned an ideal daisy: it would have very large pure white flowers, smooth stems, early and persistent blooming, good keeping quality as a cut flower and sturdiness as a garden plant. The Shasta daisy is a quadruple hybrid.
In 1884, he planted seeds of the oxeye daisy. He allowed the flowers to be freely pollinated by insects (open pollination) and selected seed from the best of these for replanting (selective breeding). He repeated this process for several seasons, but saw no significant improvement in the flowers. He then pollinated the best of these early selections with pollen from the English field daisy, which has larger flowers than the oxeye daisy. The seedlings from this cross (hybridization) were planted here, in rows 700 feet long. These new daisies flowered in their first year (instead of the second year, like their parents) and bloomed earlier in the season, with larger and more numerous flowers.
The best of these hybrids were then dusted with pollen from the Portuguese field daisy and their seedlings were bred selectively for six years. More than a half million flowers were grown, to yield the few that met his standards. Eventually, daisies were developed that bore extremely large beautifully-formed blooms on sturdy, free-flowering plants. He considered them perfect, except that they weren’t white enough.
He pollinated the most promising of these triple hybrids with pollen from the Japanese field daisy, a species with small, pure white flowers. The first generation of what were now quadruple hybrids showed no change, but when he bred the new plants to each other (a Burbank innovation), the resultant seedlings bore flowers that were larger and beautifully white, on graceful, vigorous plants.
The new flowers were introduced in 1901 (17 years after the experiments were begun) as a mixed selection, the Shasta daisy hybrids. They were named for California’s glistening white Mount Shasta, and presented an entirely new plant species, now known officially as Leucanthemum x superbum. Since that time, the daisy has become a popular icon as well as garden flower. Others have continued Burbank’s work, and many new varieties of the Shasta daisy have been introduced (pictured above).

This farm is one of those places that must be revisited in the Springtime, when all of Burbank's creations put on their greatest show. We will be back.

“Flowers always make people better, happier, and more helpful;
they are sunshine, food and medicine to the mind.”
- Luther Burbank

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