If you are referring to the Southernmost part of the State, many berries do not grow so well here. Berries like sun, but in this climate it is so hot and dry that too much sun scorches them. Blackberries and black raspberries grow better than some of the other berries. There is basically no winter chill here, at least not at the lower elevations. The climate is fairly moderate year round, anything could be grown year round, or at least cold is not an issue. Deciduous fruit trees and berries can still somehow sense the season though, though their timing often tends to be off, because the lack of chill confuses them.

There are not a huge number of berries here in the Southern part of the State, berries can certainly be grown but they are not prolific. There are a few blackberries growing in the wild in certain places, but this climate is not the most favorable to them, unless they receive irrigation.

Plants have a long growing season in this climate. The main issue is lack of chill. Berry plants still seem to follow a general seasonal pattern. If they were not so scorched by the sun, and were a little more vigorous growing, I think it is indeed likely that they could produce throughout the year.

I have blackberries in northern CA (the capitol) but they pretty much have only a single season bearing. They fruit on last-year canes, then those die back. Cycle repeats the following year.

Longer seasons might work better for annuals from seed, you can stagger the plantings and extend the harvesting season. That would require a lot of water and planning, i haven't done it. When it gets really hot, plants that haven't gotten going can sometimes stall...probably from stress.

I think the year-round harvest is more likely as you get closer to the equator, but not every plant will do well in that climate.

I get two harvests from most of my fig trees and my Anna Apple trees. Berries too invasive here. Our berries are Pakistan Mulberries. One harvest.

What we can do that Canada can't is grow vegetables and fruits outdoors year round. We have cool season crops (lettuce, peas, broccoli, etc.) and warm season crops (corn, tomatoes, peppers, etc). The cool season is October through April and the warm season is May through September. There are also citrus that fruit in the winter (Navel oranges) and citus that fruit in the summer (Valencia Oranges). Same with Avocados--Reeds in Summer, Fuertes in Winter. Lemons may be continuous, the year round. A well-established low-chill blueberry bush may produce for several months.

Also things like everbearing strawberries produce almost continually along the central and southern coast -- the prime strawberry growing region in the country. Many plants are still hardwired to only produce fruit once a year, but the bottom line is that with the incredible variety of things that can be grown, especially in SoCal creating a continuously productive garden/orchard through the year is relatively easy.

I'm definitely jealous, living in NM!

Most berries have one crop no matter where they're grown, but there is at least one raspberry that produces twice a year: September Red; it produces a small Fall crop on the new canes and a bigger one the following Spring.

As to other crops:. I have an Eggplant that is going on its third summer and slowed-down briefly in mid-winter; and, jalepinos and Anahim peppers that are already bearing a crop.... Picked a huge bunch early June and took to DD in Oregon.

I had spring vegetables all winter and the kale and book choi from last year just went to flower.