Rose pruning and frost
This is probably a daft question, but when gardening mags and books say don't prune roses in time of frosts, what exactly do they mean? If there was a frost in the morning, but it's gone by lunchtime can you prune in the afternoon? If the weatherforecast says frost for the next day can you prune the day before? Or does it just mean don't prune while there is frost at the time of pruning? Though why should one want to? Most uncomfortable and chilly!