Episode Details

TODAY’S NEWSLETTER PODCAST: UC Davis Arboretum Superintendent Warren Roberts talks about persimmon trees, both American and Japanese persimmons.

California's Central Valley was ablaze in October and early November with the other “orange” fruit tree: the brightly colored persimmon. And it's not just the fruit.

Persimmon tree leaves can turn a brilliant hue of red before the first big wind and rain storm of late November washes them off their branches. What's left behind is the unpicked fruit, dangling like holiday ornaments during December. That's a feast for our eyes...as well as a banquet for hungry birds and squirrels.

Persimmons have adapted well to our California climate: warm, dry summers and mild winters. At least 500 different Japanese persimmon (Diospyros kaki) varieties were brought to California during a major planting spree from 1870 to 1920. In 1877 alone, more than 5,000 plants in 19 varieties were imported from Japan. As a result, 99% of the U.S. commercial persimmon crop is grown here in California.Persimmons are quite nutritious, as well, loaded with Vitamin A, Vitamin C, Fiber, and antioxidants such as Beta-Carotene and Lycopene. 

If you live in the Central Valley, Southern California, Bay Area or low foothills as well as throughout USDA Zones 8 and 9 ... you can grow that! Bare root Japanese persimmon trees will be available at local nurseries during late December, January and February. Give them full sun and regular irrigation in the dry months for best production. Persimmon trees can tolerate partial shade.As Warren explained in the newsletter podcast, persimmons are usually classified as either astringent or non-astringent. For fresh eating straight from the tree, choose a non-astringent, self-pollinating variety such as Fuyu, Giant Fuyu, Yemon or Izu. Astrigent varieties, which need to soften thoroughly before they sweeten, include Hachiya, Chocolate or Tamopan. Those varieties are self-fruitful, as well.

Persimmon growing advice from the California Rare Fruit Growers (CRFG):Location: Full sun with some air movement is recommended for persimmon trees in inland areas, although they will tolerate some partial shade. Persimmons grown in cooler areas should have full sun with protection from cooling breezes. As an attractive ornamental the tree fits well in the landscape. It does not compete well with eucalyptus.Soil: Persimmons can withstand a wide rage of conditions as long as the soil is not overly salty, but does best in deep, well drained loam. A pH range of 6.5 to 7.5 is preferred. The tree has a strong tap root which may mean digging a deeper hole than usual when planting (when on D. kaki stock).Irrigation: Persimmon trees will withstand short periods of drought, but the fruit will be larger and of higher quality with regular watering. Extreme drought will cause the leaves and fruit to drop prematurely. Any fruit left on the tree will probably sunburn. Some 36 to 48 inches of water are needed annually, applied gradually in spring and tapering off in the fall. Hot inland areas may require 2 or 3 applications weekly, while coastal areas may need watering only once every 6 weeks, depending on the soil. If a drip system is is used, the emitters should be moved away from the trunk as the tree matures.Fertilization: Most trees do well with a minimum of fertilizing. Excess nitrogen can cause fruit drop. If mature leaves are not deep green and shoot growth is less than a foot per year, apply a balanced fertilizer such as a 10-10-10 at a rate of 1 pound per inch of trunk diameter at ground level. Spread the fertilizer evenly under the canopy in late winter or early spring.Pruning: Prune persimmon trees to develop a strong framework of main branches while the tree is young. Otherwi