This avocado grove is on the north-facing slope of Moosa Canyon in Bonsall.*
The mature trees on the ridge are really badly damaged. This hillside is right where two canyons converge, so it certainly would have been hit by a lot of cold air during the freeze in mid-January.
Below the mature trees some saplings had just been planted last summer. In the larger versions of this photo, the white stakes that supported these little trees remain visible. The saplings were probably killed.
This grower took quite a gamble in planting Hass avocados so close to the canyon floor. That’s Moosa Canyon Road visible at the bottom left of the photo (I am standing across the main road from where this grower’s access road heads up the hill.) Here the road is barely above the creek, so this is about as low as the canyon gets. I’d guess the temperature dipped close to 20 at creek level, and was probably below freezing even up where the mature trees are for close to eight hours one night and five or more the next. A gamble lost.
* We are on the south-facing slope, and this grove is visible from here, a bit to the east.