Skip to main content


Thomson began experimenting with rare fruits during the early 1950s after being stationed in San Diego. He and his wife, Helen, purchased five acres (2 ha) of land in Bonsall, California, in 1952.[2] The couple initially lived in a trailer on the land while they were building their home.[2] He began experimenting with tropical fruits and fruit trees that were usually found in climates warmer than that part of Southern California.[1] Thomson initially planted papayas, lychees, mangoes, longans and other tropical species on his new 5-acre (20,000 m2) farm.[1] However, most of his attempts to grow these fruits were a failure due to freezing temperatures during the winters.[1][2] For example, mangoes could not survive the winter climate in Bonsall.

Thomson decided to make another attempt at growing tropical fruits with a second farm in a different location. In 1962, Thomson purchased another small farm in Vista, California, and called it Edgehill.[2] 

His newest farm and orchard was only five miles (8 km) from his other property in Bonsall, but it had a much milder climate, especially during the winter.[1] This made Edgehill more conducive to growing tropical, exotic fuits that had not been previously grown in California. He was able to finally grow successful harvests of mangoes, cherimoyas, lychees and other fruits.[2]

The Los Angeles Times reported in 1971 that Thomson was able to grow 96 separate types of fruit between his two orchards in Bonsall and Edgehill.[1] Most of these fruits had not been widely grown in the United States before Thomson planted them on his properties.[1] Thomson grew the first successful Mammee apple crop, also known as the South American apricot or the mamey, of note in California.[1] He also ran the only longan orchard in the United States at the time.[1] A friend of Thomson, Jim Neitzel, said that his Edgehill farm soon attracted the attention of other botanists and tropical fruit enthusiasts. "His Edgehill property was the biggest feather in his cap. People would come from all over the state to check it out."[2]

Paul Thomson , legendary plant breeder and self taught Horticulturalist/Botanist left behing quite a legacy. 

In 2011, IMO representatives discovered the location of the 5 acre EdgeHill Estate located in Vista, California:

IMO NOTE: PAUL THOMSON (no P) was the founder of California Rare Fruit Growers right here in Northern San Diego County back in 1968. Mangoes have been grown successfully in San Diego county for over 50 years. The first mango plantings in California took place in 1880, (19 years) after the first in Florida in 1861.

Paul Thomson was a wonderful man who dedicated his life to develop many various fruits.

(CRFG)-California Rare Fruit Growers published his biography in their magazine Fruit Gardener in the March 2008 issue (Vol 40, #2) 

If you want more information try and get a copy of this magazine. 

You can go to and find out how to get this issue. 

Jack Burgard handles the sale of theback issue of the magazines. 

His telephone number is 951 353 1767.

Paul worked in mangos for a number of years at Edgehill Estate in Vista, California. 

Bonsall, just a few miles away, was too cold for this fruit. 

He worked with 72 varieties and had exhibited 29 varieties at various times. 

His favorite was called 'Thomson' ( after him) 

 This was a seedling from a Manila variety.

 Paul was in close contact with the people who were growing mangos in the low desert.

One of Paul's seedings did very well in the desert but did not make the final cut because the fruit was not big enough. 

Thomson was his best mango and many people are growing that one in California.

 It has become very popular all over.

I hope this information will be of help to you. 

I am very glad that Paul's work is still be recognized even after his death.

Edgar Valdivia

Popular posts from this blog


While "Flavor" is very subjective, and each country that grows mangoes is very nationalistic, these are the mango varieties that are the most sought after around the world because of sweetnesss (Brix) and demand.

The Chaunsa has a Brix rating in the 22 degree level which is unheard of!
Carabao claims to be the sweetest mango in the world and was able to register this in the Guiness book of world records.
Perhaps it is time for a GLOBAL taste test ???

In alphabetical order by Country....



Alphonso (mango)
From Wikipedia, the free encyclopedia

Alphonso (हापुस Haapoos in Marathi, હાફુસ in Gujarati, ಆಪೂಸ್ Aapoos in Kannada) is a mango cultivar that is considered by many[who?] to be one of the best in terms of sweetness, richness and flavor. 

It has considerable shelf life of a week after it is ripe making it exportable. 

It is also one of the most expensive kinds of mango and is grown mainly in Kokan region of western India.

 It is in season April through May and the fruit wei…

DHL (INDIA) makes gifting mangoes as easy as 1-2-3-....

Gifting mangoes is now easy with DHL
Announcement / Corporate

 May 19, 2011, 14:04 IST

Come this summer pamper your loved ones abroad with a box of delicious mangoes through DHL’s Express Easy Mango service, a unique one-stop-shop and hassle-free service for gifting mangoes all across the world.

This unique service by DHL Express, the world’s leading express company, allows customers to send mangoes from India across the world to the following countries Belgium, Canada, Czech Republic, Germany, Greece, Hungary, Hong Kong, Italy, Luxemburg, Maldives, Netherlands, Norway, Oman, Qatar Singapore, Switzerland and Sweden.

Mangoes can be availed of free of cost by merely paying for the Air Express service. In addition, DHL Express assists customers with the necessary paperwork along with procurement of quality-grade Alphonso mangoes.

Commenting on the new service, Mr. R.S Subramanian, Country Head, DHL Express India said: “With the advent of the mango season, it is no wonder that DHL Express Ea…

GMO MANGOES : Philippines has been working on it since 2000 ...

The genetic engineering used in modifying mangoes is extremely similar to that of the papaya. 

This is because both mangoes and papayas posses the ACC (ACS2) gene. 

This gene is responsible for producing ethylene and the influence of ethylene on the fruit is that it controls the ripening and senescence after the fruit has been picked. 

The main purpose of this genetic modifying is to reduce the amount of ethylene produced and to lengthen the onset of this gas. 

Scientist extract this gene from ripe mango var 'Caraboa' and after they separate the gene it is then cloned and sequenced. They can then insert the isolated gene back in the genome and it will act as a disturbance to the enzyme calling for more ethylene to be produced. 

Alternately, an ACC deaminase gene is inserted and its function is to convert ACC into a different substance which results in less ethylene being produced. 

Since genetically modified mangoes are on the market, scientists are free to explore other more effic…