It's important to apply weed & feed when weeds are actively growing. Applying weed & feed during the winter will have absolutely no effect on the lawn in the following spring and summer. You should spread weed & feed on damp/wet grass (use a sprinkler or apply just after rain) so that the granules stick better to the leafy portions of the weeds.

You should also pick a time when no additional rain is expected for two days, and you should ...»