The CA Avocado Commission contracted with LandIQ to evaluate the extent of avocado plantings in the state.  The planted area is down from close to 90,000 acres in 2000 to 51,000.  San Diego still has about 29% of the acreage, but now the area north of Los Angeles (once the dominant avocado growing area); including Ventura, Santa Barbara and San Luis Obispo, accounts for about 75% of the acreage.  40% of the trees are less than 15 years of age, which probably means most are planted on root rot resistant rootstocks, avocados' scourge, which should mean healthier more productive orchards.  Almost 20% are also planted on higher densities than the traditional 20 x 20 feet which should mean earlier, larger production, but more pruning.  Read the report here:

Acreage Report