Winter Sowing

WINTER SOWING is a propagation method used throughout the winter where temperate climate seeds are sown into protective vented containers and placed outdoors to foster a naturally timed, high percentage germination of climate tolerant seedlings.

This would be a great way to start milkweed plants for Monarch butterflies -  as well as nectar sources such as new england asters - purple coneflowers, etc. for next spring. 

MINIATURE GREENHOUSES
Trudi Davidoff recommends sowing seed in miniature greenhouses (made from recycled water and milk jugs) and placing them outdoors.  Please visit the below links to find out more.
http://www.wintersown.org/   
Here is a ,pdf brochure that explains Trudi's method

Another link
Winter Sowing - A step by step guide from "Get Busy Gardening"

There are also a number of videos on YouTube about winter sowing from which to learn!

SOWING DIRECTLY ON THE GROUND
Late October through November is an excellent time to sow seeds on bare ground.

Strip off any sod, weeds or grasses. Cultivate the soil to a fine tilth, firm the soil by treading on it, and rake lightly. Sow the seed mixture (with fine sand for even distribution) at a rate of 1/8 oz per sq. Some people just spread the seed on bare ground and walk on it to ensure seed/soil contact.