Lawn fertilization schedule

Asked May 6, 2020, 11:59 AM EDT

I have over-seeded my lawn in late March and applied starter fertilizer afterwards.
What fertilizer and when should I apply next?
Do you recommend any weed killers or the growth of new seedlings will compete with weeds for nutrients and thereby kill them? Spot treatment for weeds?

Montgomery County Maryland

1 Response

Hi - Since you have already applied a starter fertilizer, next you can use a maintenance fertilizer. These are formulated without phosphorus to comply with the Maryland Lawn Fertilizer Law. https://extension.umd.edu/hgic/topics/lawn-fertilizing
We recommend applying it at a half-rate at the end of May or early June and then fertilize again in the fall.

Here is a link to our lawn fertilization schedule. For a tall fescue lawn, you may not exceed 2.7 lbs. of nitrogen per year. https://extension.umd.edu/hgic/topics/ume-lawn-fertilizer-schedule-home-lawns

We recommend spot treating the weeds, but please be aware that Montgomery County’s pesticide law bans the use of most synthetic pesticides, including herbicides, insecticides, and fungicides on private lawns, playgrounds, mulched recreation areas, and childcare facilities. Organic pesticides are allowed. Go to the

following website for information regarding the law and organic lawn care
You can also ask them questions. Email AskDep@MontgomeryCountyMD.gov or call 240-777-0311.

Christa