Cold weather heeby-jeebies


The temptation to get out my Felco pruners and my lopper and going to work on all my plants that have been damaged from the freeze. The soggy mushy crinums. The drooping brugmansia, the unattractive plumbago, even the perennial butterfly weed, its dry stems and brown rustling leaves that I think are very attractive, but  at the same time, I’m longing for the green to sprout.

Only a couple of things hold me back. One, if I cut off the damaged limbs and various appendages of my plants, it will be difficult for me to tell where the damaged part ends and the live part begins. If I cut into the green that might cause the plant to sprout during some warm days. That would be okay if there are no more cold snaps, but with our recent weather (it’s snowed twice this year) that would be hard to predict. If I do prune, the plants do sprout again and another cold period arrives, the sprouts will also be frozen and the entire plant may not recover.  I don’t know if we’re going to have another cold storm. We’re in mid-January. Spring generally starts here on the upper Gulf Coast in very late February or early March. But with this kind of weather, who knows what might happen. Additionally, the dead material will help insulate the plant until spring actually arrives.

In my vegetable garden, I covered my Brassicae (cabbages, brocolli, cauliflower, Brussel sprouts) with frost cloth and a tarp, but I could just as well have covered them with ice cubes. When I checked on them Tuesday afternoon, they were stiff as a board and as brittle as thin glass.

What a surprise when on Thursday afternoon, after the worst had passed, they were not only thawed, but what I thought would be mush instead were tall and sturdy leaved, green and thriving plants. And they are all close to harvest.

The reason that Brassicas and other cold -tolerant plants can withstand lower temperatures is because of their sugar content. Cold-weather crops have more sugar in their cells. Sugar water has a lower freezing temperature than plain water. Plants that are not cold-hardy have much less sugar in their cells, so have a higher freezing temperature. When the water freezes and then thaws, it causes the cell walls to burst. Plants with higher than average sugar content have a much greater advantage surviving freezing temperatures. If you notice, many cold-weather plants taste sweeter after a freeze or frost.

Our roses didn’t seem to be very affected at all. Most of them are natives from the Great Plains, and are, I’m sure, used to cold weather. Even the Duchess de Brabant bloomed throughout the weather and looks totally unscathed. But the crinums, angel trumpets, Turk’s cap, and a host of other plants are going to have a struggle – if they survive at all.

I do plan to take my own advice (if I have the stamina, patience and intestinal fortitude) and wait until early spring to prune everything. But when I look at my once-beautiful plants, I feel like Dr. Strangelove, my hand uncontrollably drawn to my left-handed pruners instead of the “button.” I have been spending cold evenings in my garage, polishing, cleaning, oiling and sharpening them. Maybe it’s just the cold weather and a slight case of cabin fever – not me becoming a serial planticidal maniac.

 

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Bob Dailey

Bob Dailey is a garden writer, lecturer and gardener living in southeast Texas.