October.
In October great operations are carried out in herbaceous borders. New plants come in from nurserymen or friends; old ones are cut down, fed, and in some cases divided; seedlings are put in groups where they are to flower. These things are done all through the autumn, according to convenience. In a mild district you may go on till Christmas planting out and reorganizing your borders. In a cold one get it done at the end of summer, before the frosts come. Any bulbs you have not planted in September should go into the ground now.