Here are some photos of frost damage, (and no damage,) following 6 days and nights of below 10F.
The sustained cold with a slight breeze in very dry ground was different than previous cold years. We only got above freezing for about 4 hours every day for about 10 days and were below 20F from about 6 pm to 9 am.
Several of the perennials that are under the cover of trees felt pretty badly about the cold.
Many of the leaves froze on the bushes and trees.
The Ceanothi really got beat up by the cold.
These Ceanothi survived the last cold when we got down to 7F, but this one was just too long.
Morro Manzanita didn't feel the cold or frost.
Sunset manzanita felt some drought but not the frost.
Both Sugar Bush and Lemonade Berry didn't feel the drought nor the frost.
Most of the Buckwheats did fine.
The leaves on many of the trees froze in place.
Ceanothus Concha has always been a very stable plant here, but the cold got to it this time.
We had a little tip burn on the Arctostaphylos Brother James.
The Arctostaphylos rainbowensis really felt the drought and the cold.
Dr. Hurd manzanita seems to be good for coastal gardens. Not so hot in interior droughty gardens.
Green Leaf manzanita felt the cold and drought a little.
Arctostaphylos Harmony felt the drought but did fine in the cold.
Most of the holly leaf types of Ceanothus did fine.
Many of the northern Ceanothus hated the drought and the cold.
But some of the Southern Ceanothus did fine. Maybe the ability to survive the drought stress helped protect plants liked Ceanothus spinosus.
Ceanothus oliganthus did fine under the drought stress and cold.
Blue Corgi manzanita is one we're playing with. Folks seem to like the small size and foliage. The cold and drought didn't seem to bother it.
Paradise manzanita was having real trouble with the drought, and then the cold nailed it.
More cold Ceanothus.
Romona Manzanita has done well in the drought and frost.
La Panza Manzanita did fine in the cold and the drought.
Baby bear seems to be pretty cold hardy and drought tolerant.
The Buckbrush from the inner coast ranges is doing fine under the drought and cold.
We commonly see plants like Silver Lupine, Lupinus albifrons, that grows to 8000 ft(2400 meters) freeze here.
Salvia Pozo Blue made it in flying colors. It can't seem to make it at Big Bear City or Potland Oregon but should do fine in most of California.
Coastal forms of Coffeeberry seem to be good to about 5F. Here is Tranquil Coffeeberry.
Frost and drought damage to Ceanothus Concha, Ceanothus impressus nipomoensis and Ceanothus foliosus
I have no idea how this Arctostaphylos uvas-ursi San Bruno has survived the drought(it is in a dry drainage ditch) and the cold.
The flowers got frozen off of Arctostaphylos John Dourley.
Ceanothus thrysiflorus repens got the leaves frozen off of it.
Considering Xylococcus bicolor, Mission Manzanita grows down in San Diego it handled the frost better well.
Some of the Pigeon Point did fine.
Some of the Pigeon Point did not do well.
Arctostaphylos stanfordiana stanfordiana Zin Manzanita seemed to do fine.
Ceanothus cyaneus, San Diego Mtn. Lilac felt the frost a little.
Ribes malvaceum did well in the 2013 drought, freeze and deer.
Drought, deer and frost on Ceanothus arboreus.
Iris douglasiana, Douglas Iris is getting watered in the ground here so it's alive, the deer and frost did not bother it.
Dead Rosemary(not native) and dry Buckwheat(which will come back.
Pickeringia montana, Chaparral Pea doing very well after the drought and frost. AND the deer haven't bothered it.
A Fremontia Pacific Sunset next to a Ceanothus tomentosus after the frost. The Ceanothus is fried, the Fremontia is fine.
The Santa Cruz Buckwheat did fine in the ground, the pots got beat up though.
The Ribes viburnifolium burnt in the pots and a little in the ground, but it looks to survive.
Ribes speciosum is amazing, coming back from summer dormancy like nothing is happening.
The front of the main building gets very cold, and hot. This Ceanothus Remote Blue has been there for about 15 years and done fine until this year.
This 10-12 year old Salvia gracias will go summer deciduous under the drought, but we've have .2 on an inch of rain last month and it came back. Frost didn't bother it.
Purple Sage seems to be very drought tolerant and hardy.
Juniperus californica seems to very at home with low rainfall and cold.
Purshia glandulosa has done well in the drought and frost.
Nolina bigelovii, Beargrass dfd fine. We've lost it before to cold wet soil.
Mahonia nevinii seems to be very cold hardy and drought tolerant.
Our 34 year old Ceanothus Ray Hartman really got hit by the drought and frost.
Arctostaphylos silvicola, Ghostly Manzanita did very well under the drought stress and handled the cold well.
Garrya elliptica James Roof, Silk Tassel is struggling under the drought, but handled the frost well.
The Arctostaphylos purissima rarely sees frost in the wild, but showed no damage in our cold.
Comarostaphylis diversifolia, Summer Holly is another plant that should have froze out but did fine.
Ceanothus verrucosus has done very well in the dry cold.This Ceanothus is about 30 ft. from the Ceanothus Ray Hartman that got killed.
Ceanothus Heart's Desire was not browsed and did find with the cold.
The Toyons have felt the drought and slightly felt the cold. They really do not like high humidity and low air flow, the cold and drought are not as bad.
