Greetings and salutations, everyone; yes, once again it is I, Mani the purebred border collie, filling in for the guy I live with, and here today to talk about antifreeze–not the car kind, but the plant kind. You may remember me from such posts as “The Ghost In The Grapevine”, among so many, many others.
Here I am in a characteristic pose.
It was nice and sunny today, but last night it kind of froze. There was ice in the bird bath, anyway.
The other day, the guy I live with noticed that the pinyon in the front yard (Pinus edulis) had nuts.
He said he could sometimes find bags of these in Mexican groceries not very far from here, and that the roasted and salted nuts are very, very good.
You can also use these for making pesto.
I think he’s just going to leave these, since there aren’t very many. This may have been the first time these pines produced nuts.
Of course there were crocuses in flower the other day.
This is Crocus oreocreticus. (The word oreocreticus is from the Greek oros, mountain, and creticus is Latin for Crete.)
It’s a member of the saffron crocus family.
This is the real saffron crocus, Crocus sativus (the commercial one, you might say; sativus means “cultivated”).
Those are crocus leaves behind the flower; you can tell by the white stripes.
The guy I live with forgot to collect the styles to get more saffron.
There were some Crocus speciosus still in flower, too.

Anyway, it kind of froze. I went around the garden to make sure things were okay.
So here we go.
The guy I live with saw a Facebook post showing Nerine bowdenii in flower, which it does now, and he asked the person when the leaves emerged. The answer was the following spring.
The guy I live with tried to grow this bulb many years ago, and it produced leaves just about this time of year, and of course the leaves froze and the bulbs died. He consulted a number of what he would call authoritative texts, and some said leaves over the winter, and others said leaves only in spring.
The plant is native to South Africa and a website from there said the plants are dormant in winter, so no leaves.
He said this was a complete mystery.
Plants with overwintering leaves in cold-winter climates manufacture “antifreeze” (sucrose, glucose, fructose) to prevent the water between the cells from expanding which would basically causing the plant to explode from freezing.
Lots of plants do this. Conifers do it, and in fact they can completely stop photosynthesis during cold winters. They just sit there; the pinyon pictured above can go eight months without photosynthesizing. They certainly don’t need to be watered; that should have been done before cold weather set in, since the manufacture of “antifreeze” is due to photosynthesis.
Basically any evergreen plant hardy in our cold winters makes “antifreeze”. Otherwise they would die.
Hardy cactus do something different; they lose water and shrivel, and can’t take up water until the following spring.
(The guy I live with said I could include scientific references for all this, but I thought it would seem too pretentious. He also prefers the term “cryoprotective sugars” instead of “antifreeze”.)
Autumn-flowering crocuses with overwintering leaves manufacture “antifreeze”, and so do snowdrops.
Snowdrops are super-tough plants and are completely unfazed by being frozen.
This is Galanthus bursanus again, after being sort of frozen. (The leaves on the left are Lilium candidum, another plant that can deal with very cold temperatures; the leaves stay green all winter, though they may look a bit battered.)


I’m pretty sure that’s all I have for today.
The guy I live with said that the Big Scary Night was tomorrow (he has plenty of Kit Kats), but I’m so exhausted from all this antifreeze talk I may sleep through everything.

Until next time, then.










