Well you would be putting down twice as much fertilizer than the product calls for. Just wait until it is supposed to get another application and then use it. You could always put down an organic application such as soy bean meal and not burn your lawn.

Here are some general guidelines for fertilizing.

1. Don't use weed n feed products. If you have weeds, then fertilize first with plain fertilizer and come back in two weeks to spot spray individual weeds with something like weed-b-gone. WNF products sound ideal but they don't work like they promise to work. You are much better off using fertilizer when you need fertilizer and separate weed control when you need weed control.

2a. With chemical fertilizers, fertilize once in the spring and twice in the fall. In the spring wait until after you have mowed real grass for the second time. That will ensure you are not fertilizing the early weeds.

2b. With organic fertilizers, you can fertilize any day of the year or every day of the year. Just don't smother the grass with it. Apply most of them at a rate of 10-20 pounds per 1,000 square feet. Ordinary corn meal, alfalfa pellets, soy bean meal, and cottonseed meal are typical organic fertilizers that can be found in 50-pound bags at any feed store.

If you want to speed up your lawn's image but feel frustrated that you should not use more chemicals now, then use organic fertilizers from now until Labor Day. Then you can do the first app of chemical fert and again on Thanksgiving. You can apply both chemical and organic on the same day if you want. They do not interact with each other.

Now here is the basic 123 of lawn care.

2. Water deeply and infrequently. Deeply means at least an hour in every zone, all at once. Infrequently means monthly during the cool months and no more than weekly during the hottest part of summer. If your grass looks dry before the month/week is up, water longer next time. Deep watering grows deep, drought resistant roots. Infrequent watering allows the top layer of soil to dry completely which kills off many shallow rooted weeds.

3. Mulch mow at the highest setting on your mower. Most grasses are the most dense when mowed tall. Bermuda, centipede, and bent grasses are the most dense when mowed at the lowest setting on your mower. Dense grass shades out weeds and uses less water when tall. Dense grass feeds the deep roots you're developing in 1 above.

4. Fertilize regularly. I fertilize 4 times per year using organic fertilizer. Which fertilizer you use is much less important than numbers 1 and 2 above.