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As I’ve been working in the garden in recent days, I’ve noticed that there are still a few buff-tailed bumblebees around. They’ve been attracted to the yellow flowers of our mahonia, which is a great source of nectar and pollen during late autumn and winter.
While most bumblebee colonies die off for the winter, with just the mated queens hibernating and then starting new colonies in spring, the buff-tails (Bombus terrestris) can stay active. 30 years or so ago, buff-tailed queens would have hibernated too, but in more recent times both queens and workers may be seen flying in winter. It seems that this is the result of winters becoming milder, especially in southern areas of the UK.
There are not many sources of nectar for winter-active bumblebees, so the mahonia, which is a large shrub and well-covered with flowers, has become a valued feature of our garden. (By the time the mahonia has finished flowering, there will be some hellebores and later on there is the plum blossom. We do, however, want to increase the available food for bumblebees over winter.)
As you can see from the photographs, the mahonia flowers don’t mind a bit of frost or snow. Ours has the sunniest spot in the garden, so bees can enjoy the warmth of any sunshine right from early morning until sunset. The shrub was already here (and mature) when we came to this house, so I can’t be sure of the cultivar, but it does look like the very popular Mahonia x media ‘Charity’. I’m certainly very glad that a previous owner did plant it and I should think that the bumblebees are too! 🐝

Snow melting from mahonia flowers doesn’t seem to cause them much damage.





















