The weather this winter means that some of the plants in my garden are going to struggle to make it through. It's not only that it's cold - flaming cold - but it's the extent and duration of the cold snap.
Currently it is -5.5C, the coldest it has gone down to in the last two weeks is -9.5C, but apart from Sunday, the temperature hasn't lifted above freezing during that time.
Extensive, long cold periods mean that plant roots freeze and, as a result, can't absorb water so it's like they're in 'drought' conditions. Also, as water freezes, it expands, so plant cells literally explode as the mercury drops.
It's even worse for plants in containers as the roots don't have the surrounding insulating soil to keep them warmer.
At the beginning of this year, after the 2009/2010 winter I got inundated with e-mails from people worried about plants coming through the winter. Surprisingly in some respects, the one plant that got most enquiries was cordyline - even those that had been growing in gardens for many years. I'm expecting another e-mail avalanche after this cold snap.
The one good thing is that it hasn't been windy, which puts even more stress on frozen plants, literally sucking moisture from the leaves that isn't replaced as the roots can't absorb anything from the soil. Oh great, I've just heard on the radio that the next few days are going to be windy. Pass me my credit card!
At least I haven't had to drive anywhere recently and so haven't been stranded in my car for 10 hours trying to battle against frozen roads/snow. Every snow cloud has a silvery lining.
The picture shows a shivering Pittosporum tobira.
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