October is a great month in the Pacific Northwest for over seeding, planting, fertilizing and raking leaves.
Remember to not let the leaves smother your. rake em, suck them up with the lawn mower. Leaves in the bed act as a weed deterrent and break down and feed the trees. On the other hand they house insects and are not good in piling up around the trunks of trees. It is good to keep tree rot to a minimum. Leaves also clog water drains, and can be slippery on the sidewalks. One can also compost them.
Love em or Leave em.