Cold weather ends the growing season sooner or later, this year it was rather soon. With no snow insulation, cold can induce more damage that with thick layer of snow insulation. This year, despite all the cold, we are yet to see the first snow.
Borinda fungosa seedling was holding on very well down to -5°C. Soon night temperature dropped down to -7°C and many of the leaves got damaged. Leaves that remained undamaged, surprisingly remained unfolded even during sunny and windy weather. It did loose all the shoots from this autumn, as it did last winter, but this time, some of them remained tall, only loosing their fragile top. Perhaps in the spring, they will begin the branching process. Cold weather persisted for around two weeks, daily highs were slightly above or below freezing, it was sunny and windy most of the time. Morning low temperatures were between -5°C and -8°C. This is it’s second winter outside, I’ll see how it resists cold. Last year when it was covered in thick layer of snow most of the winter, it managed to keep most of the leaves intact.
Well, the problem with all that snow insulation was weight. Heavy wet snow broke all the taller culms and only a couple of old tiny ones remained. Dead shoots that grew in late fall were not all dead, one of them managed to grow branches around the lowest node, that was buried under thick layer of mulch.
After almost a month of very cold weather, with fog persisting through most of the day, with day temperature slightly below freezing, leafs managed to unfold, showing the damage. It looks like most, if not all, leaves were completely killed or badly damaged. Culms and branches are showing their dark brown color and they seem to be alive even after prolonged period of cold weather. Hopefully in 4 months we’ll get some warm weather for it to recover.
Hibanobambusa tranquilans ‘Shiroshima’ is looking hardy enough to survive this kind of cold dry weather without hassle. There’s no evident damage, not even on several late fall whip shoots. Whips stopped growing with arrival of cold weather, lower nodes actually hardened enough to drop off culm sheathes, while their tops remained fresh and stopped growing completely. I guess we’ll have to wait and see if they resume in the spring. With temperatures close to freezing, white variegation on the leaves turned into bright yellow color, making bamboo look even better.
Phyllostachys pubescens ‘Moso’ seedling that escaped it’s pot is showing moderate leaf damage. It’s evident, that there’s almost no damage on the escaped part of bamboo that ran out of the pot two seasons ago. Leaves that were pale during the summer and showed some kind of stress, wilted after first heavy frost. Dark green leaves mostly remained undamaged, but they do tend to wilt when exposed to sun. Wilting is normal, because soil already got frozen on top and bamboo have to save water inside it’s leaves.
The part that escaped managed to put out numerous runners and a couple of shoots that barely poked out through the mulch. They are most likely whip shoots that missed their growing season. So far they haven’t got soft and are most likely alive, waiting to resume in the spring. Last year, pot ended up as home of mice family that stayed there throughout the winter. They didn’t do much damage, but there were holes all around the pot and I’m sure there was some root damage. Well, better mice than voles! They can devastate whole bamboo clumps.
Umbrella palm seedlings, planted around the garden and inside the pond didn’t take the cold well. First hard frost killed everything above the soil/water level, and most likely, rhizomes as well. We’ll see if it restarts in the spring, if not, I still have one large seedling kept safely inside.
At first dark green damaged leaves turned into straw color. They’ve kept their appearance as they would still be alive. Dry clumps of umbrella papyrus are looking quite good. I’m going to keep them for a while, if rain or snow doesn’t make them look ugly that is.