This was my big summer treat- six huge and healthy pots of Ornithogalum narbonense to replace some sedums and to sit in front of the purple- leaved vine Vitis coignetiae. It’s an excellent combination and I’ve had months of pleasure from these elegant green and white flowers. They seem to glisten through the dusk – perhaps this is why they are known as Star of Bethlehem. The more I cut them for the house the more they put out new flower stems. But I’m very aware they are frost-tender and I want them to return year after year. My plan was to cut them back to ground level in December and then to cover the plants with a thick mulch of organic compost but I am not sure I should wait eight more weeks. I looked out at the sky at 2am this morning and it was cloudless and full of enormous and stunningly beautiful stars. Clearly a frost was close at hand so I will have to be vigilant and respond fast if the weather forecast is below zero.