Our Roots

The following sketch was based in part on a much longer article, Twenty Years of CRFG: How We Got There, by C.T. Kennedy, which appeared in the 1988 Yearbook of the California Rare Fruit Growers, pp. 3-17.

California Rare Fruit Growers traces its beginnings to a telephone call received in November 1966 by Paul Thomson in Bonsall, Calif. from John Riley of Santa Clara, Calif. The telephone call led to a meeting at the Thomson home, and later a visit to Thomson’s orchard in Vista, where mangoes, litchis and longans were mature and producing fruit. This led to a realization that among the many gardeners and orchardists along the subtropical Pacific Coast there was a store of knowledge and experiences which might help them all in the cultivation of rare fruits.

The CRFG did not happen overnight, however. Thomson canvassed his friends and acquaintances and corresponded regularly with Riley. By November 1968, there was enough interest to form a group. A name was chosen to best express their objective: the California Rare Fruit Growers. Thomson and Riley drew a manifesto and 27 others joined the group as charter members. One thing was certain: the need for a timely publication through which members could exchange knowledge. In these early years the focus of CRFG was almost exclusively on California conditions. A list was drawn up of all the unusual fruits known to the founders at that time, along with a membership roster. The fruit list was a puny thing compared to the one we know now, and serves to remind us just how far we have come. The old list of fruits “not known in current cultivation” is now obsolete, and the hardiness of many fruits can be adjusted several degrees downward. Early on CRFG made discoveries that today seem a bit quaint: that mangoes felt at home in Coachella Valley, for instance, or that white sapotes and feijoas can be fruited in most areas of the state–indeed, the northern limits of their culture is still unknown. CRFG still has work of this sort to do and a purpose to serve in California and elsewhere. CRFG members have not distinguished a boundary between the possible and impossible in horticulture, and have made fruit growing immensely more interesting than it was in the days of pomology manuals and all-knowing county agents.

John Riley edited the Yearbook and Paul Thomson produced the Newsletter in his home. Thomson handled the paperwork and Riley began the seed fund to obtain and distribute seeds of new fruits. CRFG held its first general membership meeting in Bonsall, the start of the CRFG effort to provide field trips, demonstrations and social events to expand members’ activity beyond the mailbox and armchair. CRFG members from the beginning have included commercial fruit growers, academicians, researchers, nurserymen, county agents, and of course the core of backyard fruit growers. CRFG grew to 379 members in 1971 and 595 in 1975. This involved just too much work for one or two persons, and in November 1978 the CRFG membership voted to draw up a formal Board of Directors, a 13-member governing body that selects a president and other officers and manages the affairs of CRFG. Later the organization completed its incorporation.

Because of the broad range of climates within California, and possibilities for growing different fruits from north to south, CRFG considers rare fruits to include the unusual and unappreciated, fruits difficult to grow by reason of climate along with extraordinary and superior forms of conventional, temperate zone fruits. Our field of interest has been further enlarged to include unusual vegetables, cereals and seasoning plants–the other rare edibles from the vegetable kingdom. To give better scope to our members’ interests, and opportunity to share experiences, geographical chapters have been formed. Each chapter has regular meeting programs, which generally include pictorial presentations, fruit exhibits and tastings, skills demonstrations, field trips, plant and supplies sales, raffles, etc. Chapters operate with considerable independence from CRFG, have their treasury and officers, and collect their own fees to cover the cost of newsletters and activities. Today there are 16 California chapters with one each in Arizona and Texas.

The chapters undertake informally to bring rare fruits to public notice in a variety of ways. These include such diverse activities as assisting in creation of certified farmers’ markets, connecting rare fruit marketers with member growers, and providing plant sales to encourage backyard nurserymen to propagate unusual fruit plants. Several chapters have circulating and other libraries. Some chapters maintain demonstration fruit plantings in public arboreta or sponsor experimental orchard plantings. Some chapters hold annual scion exchanges. The ones sponsored by northern chapters each winter are collectively widely noted for the many hundreds of fruit cultivars available. Most southern chapters produce exhibits for county fairs–frequently receiving best-in-show awards.

An important aspect of CRFG activity from the very start has been the publication of some kind of official journal, although the form has evolved over time. In the beginning the format was a quarterly Newsletter (later renamed The Fruit Gardener) containing articles of timely interest and an annual Yearbook or Journal of topical articles. In 1990 a major advancement occurred when the various pieces were reconstituted into an enlarged bimonthly publication, THE FRUIT GARDENER. This took on the look of a proper magazine, 8-1/2 x 11″ in size and using color in its covers as well as occasional inside color photography, plus a crisp new font and better organization. Refinements in the meantime include more internal color and a tighter publishing schedule. Efforts have also been made to broaden the appeal with new special departments and more articles from and appropriate to an increasing range of members outside California.

The establishment our web site (https://crfg.org/) in mid-1995 was another major advancement with implications that are still unfolding. The award-winning site today is a powerful online file of fruit-related information–all of which is free for the taking. Components of the site include all of the earlier Fruit Facts plus an equal number of new Fruit Facts, the 20-year Index of CRFG Publications (with descriptions of 250 rare and unusual edible plants), the Fruit List, the list of CRFG Member Nurseries and Fruit Sources, reprints of significant articles from earlier CRFG publications and much more. Another important facet of our web site is a “Contact Us” page that visitors can use to post questions or seek additional information.

A major benefit of our Internet presence has been the addition of a significant number of new members. Today CRFG membership stands at 3,100+ and is growing for the first time in a decade. A majority of these new members are from outside California, which adds a certain richness to the organization and strengthens our position as a truly international organization.

Founders

December 26, 1966, turned out to be an important day for the California Rare Fruit Growers. On that day the Riley family was returning home from a trip to Mexico and stopped by Bonsall, California, to see a man named Thomson. After seeing the tropicals being grown by him in Vista, California, the Rileys continued on home to Santa Clara, California. But during the visit there was discussed the need for some sort of organization that would act as a clearing house for information on how to grow unusual plants. Since the Florida Rare Fruit Council filled the bill for Florida, it was thought California should benefit from a similar group. Much correspondence and nearly two years later, Riley and Thomson bit off more than they could comfortably chew and the California Rare Fruit Growers was born in November, 1968.

There was mutual agreement that the state should logically be divided into two parts, the southern part being the area from the Mexican border to Santa Barbara and the northern part on up to the Oregon border. This division corresponds roughly to the areas where tropicals may be more or less successfully grown in the south and where it is necessary to grow the hardier plants in the north. A yearbook would be published in Santa Clara by Riley, containing feature length articles and a newsletter by Thomson in Bonsall, with shorter articles and news of interest to members. This policy has been carried out with generally favorable reaction from our members. Back issues of our publications continue to be in demand from County Farm Advisors’ offices and libraries as well as cities and universities. A definite need is being met by providing information not available elsewhere or at best not readily accessible in an organized form. Many requests are received from other countries for information and publications as we become better known. For Southern California we are becoming a clearinghouse of information on unusual plants in general and rare fruits in particular.

Much of the credit for our reputation is due John M. Riley, an aerospace engineer at Lockheed, who has edited and published the first four yearbooks as well as contributing articles to all of them and the newsletters as well. The high standard of excellence maintained in this publication has been the chief factor in its acceptance by those interested in subtropical horticulture wherever they may be. In addition to his being an excellent editor, with all the time and energy involved, Riley is a well-known horticulturist in his own right. His years in Florida instilled in him a love of tropical plants and a desire to continue to grow them even after being transplanted to the considerably more hostile environment of Santa Clara. He has persevered in spite of frosty winters which caused considerable discouragement and today has a fine collection of the hardier rare fruits that can be grown there.

The California Rare Fruit Growers expanded to the point where it demanded more of his time than he could reasonably give and in mid-1973 Riley found it necessary to resign from his position as editor of the yearbook. It was with deep regret that his resignation was accepted. However, he is still actively conducting the Seed Fund, a task which also takes considerable time and correspondence, gathering seeds and distributing them to participating members.

The California Rare Fruit Growers gives Riley a hearty “Well done” and a vote of thanks for his dedication to our cause during the formative years. We are well aware that without him we would not be where we are today.

Our other founder, Paul H. Thomson, started his early life by being born in India, since that’s where his missionary parents were and he wanted to be near his mother at the time. He came to the United States in 1928 and lived in Lincoln, Nebraska. In January, 1938, he joined the United States Marine Corps but after serving 20 years with them he decided he didn’t care for it enough to make it a career so he got out. Since that time he has been actively engaged in plant propagation, doing grafting and budding commercially for nurseries and grove owners in southern California. He has worked extensively with Macadamia, Carob and Jojoba and continues to have an active interest in plants which have an economic potential and which offer a challenge to the grower to work out the horticultural problems involved. He is working with deciduous fruits on his home ground in Bonsall and with the more tender tropicals and subtropicals on his property in Vista. He is an organic gardener and was one of the first to be so certified by Organic Gardening and Farming Magazine.

Both founders have worked selflessly through the years in developing this organization and have been a constant source of inspiration to members. Their vast knowledge and ability have seen us through many a discouraging moment and they continue to be supportive. To both we say “Thank you and thank you again.”

Chapters

Despite the fact that our name is California Rare Fruit Growers, we have members all over the world and  currently have 23 chapters in three states.  Click on a link for more information.

Acerola

ACEROLA

Malpighia punicifolia L.

Malpighiaceae

Common Names: Barbados Cherry, West Indian Cherry, Cereza, Cerisier, Semeruco

Related Species: Mapighia punicifolia has been renamed M. emarginata by recent authorities. Acerola is listed under M. glabra in the Index of CRFG Publications, 1969-1989.

Distant Affinity: Ciruela del Monte (Bunchosia argentea), Ciruela Verde (Bunchosia armeniaca), Nance (Byrsonima crassifolia)

Origin: The acerola is believed to originate from the Yucatan (linguistic evidence) and is distributed from South Texas, through Mexico (especially on the West Coast from Sonora to Guerrero) and Central America to northern South America (Venezuela, Surinam, Columbia) and throughout the Caribbean (Bahamas to Trinidad). Acerola has now been successfully introduced in sub-tropical areas throughout the world (Southeast Asia, India, South America), and some of the largest plantings are in Brazil.

Adaptation: The acerola is typically found in dry, thorn-woodlands as a deciduous tree. It grows in San Diego County, coastal Southern California and in more extreme areas with protection. There are trees in Riverside, Calif. and San Bernardino County. In general, acerola has poor cold tolerance, with young plants typically killed at temperatures below 30° F. Trees can survive brief exposure to 28° F with loss of leaves. Trees are sensitive to wind (shallow root systems). The acerola is drought tolerant, and will adopt a deciduous habit; irrigation results in leaf and flower flush. Plants can easily adapt to pot culture in well-draining, limed soil.

DESCRIPTION

Growth Habit: Large, relatively fast growing bushy shrub or small tree (to 15 feet). Can be pruned to any desired shape, but grows best as a managed shrub. Multiple or single trunks which can be trained. Occasionally, bushes appear to be composed of canes. Branches are brittle, and easily broken. Leaves may be irritating to some people. The root system is shallow, and trees can be toppled by wind, but they can be uprighted and recover over time

Foliage: Acerola leaves are dark to light green, glossy when mature, obviate to lanceolate, with minute hairs which can be irritating. Foliage will drop during water stress, but recovers well with flush and flowering.

Flowers: The flowers are sessile or on short-peduncled cymes, with small pink to white flowers with five petals. Up to 90% of flowers fall from tree, but “Blossom Set” can be used to counter this effect. Flowering can occur throughout the year, but is typically in cycles associated with rain. Irrigation can be used to induce flowering. Flowering occurs primarily on old growth. Pollination rarely observed, but thought to be by the solitary bee, Centris. Honeybees do not appear effective (contested). Cross-pollination may or may not be required depending on variety or strain (contested). In available cultivars, fruit does set without obvious pollinators or need for cross-pollination.

Fruit: Fruits are round to oblate, cherry-like but with 3 lobes. They are bright red (rarely yellow-orange) with thin skin, easily bruised. The pulp is juicy, acid to sub-acid occasionally nearly sweet, with a delicate flavor and apple notes. The fruit is very high in Vitamin C, up to 4,000 mg per 100 g fresh weight, but typically around 1,500 mg C. Green fruits have twice the Vitamin C level of mature fruits. Fruits develop to maturity in less than 25 days. Seeds typically three with fluted wings, forming a triangle. Many aspects of seed viability have not been studied.

CULTURE

Location: The plant prefers full sun for fruit development, giving rise to the problem of winter protection in harsher climates. Shaded trees fruit, but at reduced fruit densities, and the plants themselves become somewhat spindly. Due to its shallow and smaller root system, acerola can be interplanted with other crops more closely than many trees.

Soil: Acerolas grows in marl, limestone, clay and other heavy soils as long as it drains well; waterlogging of roots will cause plant death. Soil pH should be 6.5-7.5 as acid soils do not promote vigorous growth. Liming of trees and working into the soil is a common practice and necessary for high productivity.

Irrigation: The acerola does best with 1000-2000 mm of water. However, as mentioned, acerola is drought-tolerant. Irrigation can be used to cause flowering and can regulate flower cycles. Under good constant irrigation, acerola will flower all year, with between 1 and 3 flowering peaks. Acerola does well with both overhead and drip irrigation.

Fertilization: Acerolas requires a good, balanced fertilization schedule, and regular (once a year) liming of soil. Foliar sprays are very effective, and are used commercially. Mineral nutrition is very important, with good levels of boron and iron required.

Pruning: The plant will tolerate heavy pruning, but requires time for recovery. In more tropical areas, plants do not seem overly affected by pruning. Plants are pruned commercially with citrus pruners. Can be kept as a small bush (e.g. 5 ft) and will produce well.

Frost Protection: As with most frost-sensitive plants, the acerola will need some protection when grown in areas were frost can occur. Growing with overhead protection or growing next to a wall or building may be sufficient, but the plant may also be covered with heavy cloth or plastic sheeting draped over a frame for added protection. Container grown plants can be moved too a frost secure area.

Propagation: Acerolas can be propagated by seed, cutting, grafting, and other standard methods. The plant does not appear stringent in its requirements. Seed viability can be very low; in some groves, seedlings are never observed. Cuttings are considered the simplest method of propagation and, with the use standard IBA hormone, give near 100% success rates. Grafting onto rootstocks has not been systematically studied, although grafts onto Byrsonima crassifolia rootstock have been successful.

Pests and Disease: The Acerola is susceptible to root-knot nematode (Meloidogyne spp.) which causes serious problems with young trees and slower losses of productivity in older trees. It is also attacked by a variety of common insects, such as aphids, whitefly and scale. In other areas of the world (Mexico, Caribbean) weevils (Anthonomus spp.) are serious pests, and can limit fruit production. In tropical areas, Cercospora fungi can be a major cause disease.

Harvest: The fruit deteriorates rapidly once removed from tree; sensory differences can be noted within 4 hours. The fruit undergoes rapid fermentation, and is typically unusable by 3-5 days. Unrefrigerated fruit develops mold quickly The best uses are direct eating, jams and jellies, and syrups. Juices, which are popular in Brazil, do not hold their sensory characteristics for extended periods. The fruit has also been used for baby food, as a supplement source for Vitamin C, as an ice cream and pop-sickle ingredient, and in many home recipes. Frozen fruit falls apart when thawed.

In the tropics, there are typically 3 harvest periods per year. In more temperate areas, one and possibly 2 harvests occur. With regular irrigation, some fruit production may occur through much of the year. Eight year old trees can yield from 30 to 60 pounds of fruit. From seed, plant can fruit in the 2nd or 3rd year; cuttings may fruit in the first year. Productivity increases over a 15 to 20 year period, and then levels or declines. Forty year old productive trees are known in southern Florida.

Commercial Potential: Plantings of acerola are increasing worldwide, with Brazil leading the way. The increased plantings are a direct result of increased use of acerola for a natural source of Vitamin C for nutritional supplements.

CULTIVARS

B-17
A common variety. High in vitamin C and subacid to acid.
Dwarf
A low-growing cultivar, to about 2 ft. tall. Grows well in a hanging basket. Can take colder weather than others, to 22° F.
Florida Sweet
A common California variety. Fruit large, 1-1/4 inches in diameter. Skin thick. Flesh very juicy, flavor applelike, semisweet. Vitamin C content about 1,500 to 2,000 mg. per 100 g. Tree erect, with open-type growth and outstanding yields. Originated in Homestead, FL by the Florida Sub-Tropical Engineering Station.
Manoa Sweet
Orange-red fruit of the sweet type. Tree upright, spreading, very productive. Originated in Honolulu, HA by Henry Y. Nakasone, University of Hawaii. Introduced in 1963.

Other named varieties include: Beaumont, Haley, Hawaiian Queen, Maunawili, Red Jumbo, Rehnborg and Tropical Ruby. Varieties other than B-17 and Florida Sweet are not often encountered in Southern California, although several are now available from Pacific Tree Farms, Chula Vista, CA.

FURTHER READING

  • Cooper, F. The acerola comes to California loaded with vitamin C. CRFG Yearbook 3, 1971, pp 2-8.
  • Facciola, Stephen. Cornucopia: a Source Book of Edible Plants. Kampong Publications, 1990. p. 127.
  • Morton, Julia F. Fruits of Warm Climates, Julia F. Morton, Publisher, 1987, pp. 204-209.

 

 

 

postgrid

bigjorge


Meetings

Ronni Kern
July 17, 2018
Jorge Ochoa, Instructor in Horticulture at Long Beach City College, gives the West Los Angeles Chapter a brilliant talk on Passionfruit. As chapters provide information on upcoming meetings, they will…

bigjackfruit


Field Trips

Ronni Kern
July 16, 2018
Most chapters schedule field trips every other month.  Click Chapters in the Menu above for one near you.

loquatgraftseelection


Our Famous Annual Scion Exchange

Ronni Kern
July 15, 2018
Every January and February, our famous scion exchanges are held at local chapters. There are generally demonstrations of various grafting techniques as well. Sharpen up your knife and create your…

IMG_0480


Fruit Tastings

Ronni Kern
July 14, 2018
The best way to know if a variety of fruit should be in your garden is to taste the fruit before buying the tree.   Check out our calendar for…

papayatree


Nurseries & Plant Providers

Ronni Kern
July 13, 2018
Definitely a work in progress, but we are attempting to put together a listing of our favorite nurseries, both local and online.  Any recommendations gratefully received.   Alden Lane Nursery…

squaregrant


Scholarships and Grants

Ronni Kern
July 12, 2018
Education is one of CRFG’s cornerstones.  Originally interpreted as educating the general public, it has over the years centered on the education of young people interested in growing rare and…

How To Plant An Avocado Tree, Revised

By Julie Frink

1. Place the potted tree where you are planning to plant it.

2. Build up the soil around the pot, up to the level where the stem comes out of the dirt. Tamp the dirt down so it is somewhat firm around the pot. If it is a large pot you can put it into the ground half the depth of the pot.

3. Take the pot out of the dirt mound.

4. Remove the tree from the pot.

5. Put the little tree in the hole in the dirt mound left by the pot.

Little digging is necessary but nice rich dirt for a mound is. When a hole is dug there is a problem of water draining into it (and the root system of the new plant) like a well, or draining out of that area into the surrounding soil, leaching it dry depending on the soil content of the surrounding soil. If you feel better about the process by spading up the ground and making it loose or amending it that would be ok. Many of the new commercial plantings are on berms or raised areas. This has alleviated some of the root rot problems. After planting, all trees settle somewhat so that in several years the trunk area will be lower than when you planted it.

Avocado trees like lots of water but good drainage. They don’t like clean hard dirt under their outstretched branches. They like lots of leaf and wood chip litter to keep their surface roots cool and well nourished. They do not like soil under the tree to be cultivated because it disturbs their surface roots. Most of the avocado feeder roots are in the top few inches of the soil. Avocados do not do well in pots. Very large pots can be used for a few years but that is all. Transplanting from a large pot (like a whisky barrel) is very difficult. Often the root ball falls apart and the tree dies. It is very rare to get good fruit production from a potted avocado tree. It is best to plant from your 1 to 5 gallon potted tree into the ground that the avocado tree will occupy for its entire life.

Don’t fertilize heavily. Too much fertilizer will kill an avocado tree because it has all the delicate feeder roots that are so close to the surface. No fertilizer will not kill a tree. Just the right amount of a very dilute solution of fertilizer will help a tree to be healthy and to grow faster.

If the tree is quite small you might consider protecting it with a tomato cage to keep soccer balls, large birds, children and large dogs from destroying it. Baby trees like shade. Nature has them growing under the limbs of the mother tree. Larger more mature trees like lots of sunshine.

Plant Propagation Chart by Claude Sweet

This is a very wide table.  Please click on the desired plant and then scroll to the right to see all propagation possibilities.  It is also possible to sort by column headings.

PlantSeedHardwood
Cuttings
Semi-Hardwood
Cuttings
Softwood
Cuttings
GraftingAir
Layering
Root
Cuttings
Offshoots/
Division
Acerola1yes45yesyesnono
Avocado1,25554yesnono
Banana1nononononono4
Capulin Cherry1,2,4555yesyesnono
Carob1,25yes5yesyesnono
Cherimoya2nonono4nonono
Cherry of the Rio Grande1,2,4no5555nono
Citrus1,2noyesyesyesyesnono
Coffee1.45yes5yesyesnono
Feijoa4noyes66yesnono
Fig14yesyesyesyesyesno
Grumichama1,2,4555yesyesnono
Guava456yes6yesnono
Jaboticaba1nonono5yesnono
Jujube1,2no55yesyesyesno
Jujube25554.5yes6no
Kei Apple1,25yes5yesyesnono
Kiwi Fruit1,2,3yesyesyes4yesyesno
Longan1,2no55yes4nono
Loquat2no5no4yesnono
Lychee1no5yesyes4nono
Macadamia1,2noyesyes4yesnono
Malabar Chestnut1,4nononoyesyesnono
Mango2,4nonono4yes2no
Mangosteen1,2no5noyesyesnono
Miracle Fruit1545noyesnono
Monstera1,4noyes4noyesnono
Mulberry1,24yesyesyesyesnono
Natal Plum1545yesyesnono
Panama Berry1,25yes5yesyesnono
Papaya4556yesnonono
Passion Fruit4noyesyesyesyes2no
Paw Paw1,2no5noyesyesnono
Pepino Dulce154yesyesyesnono
Persimmon2,3nonono4no2no
Pineapple1no4nonononoyes
Pineapple1nononononono4
Pitomba1,2,4555yesyesnono
Pomegranate14yesyesyesyesnono
Prickly Pear1no4noyesnonono
Raisin Tree1,4no5noyesyesnono
Star Fruit1,2no55yesyesnono
Sugar Cane1yes4nonononoyes
Sunnam Cherry1,2,4yesyesyesyesyesyesno
Tamarillo45yesyesyesyesnono
Tamarind1,4no5noyesyesnono
Tree Tomato1,45yesyesyesyesnono
Wampee1,2545yesyesnono
White Sapote1,2nonono4nonono
  • 1. Used in plant-breeding programs
  • 2. Nursery rootstock production
  • 3. Requires stratification period for germination
  • 4. Common commercial method
  • 5..Very difficult; requires special procedures; variable success
  • 6. Difficult procedure used to increase valuable selections