Tracy DiSabato-Aust (Garden Designer and Author) gives expert video advice on: What does it mean to 'divide' perennials?; How do I know a perennial needs dividing?; When should I divide perennials? and more...
What does it mean to 'divide' perennials?
To break it into smaller pieces and we can take those smaller pieces and place them in a larger section in the garden or place them in a different section in the garden.
When should I divide perennials?
There's sometimes a rule that used to be said that we divide spring-flowering plants in the autumn and autumn-flowering plants in the spring. So that's a general rule, but I do a lot of divisions in the spring because we do not have a reliable snow cover, and we have a lot of fluctuating temperatures over the winter. We have some problems with autumn divisions if they're done too close to cold temperature, so we'll do a lot of plants in the spring when they're anywhere from three to four inches in height.