Posted: Today at 16:30
Hi Glen - you'd probably have been better just mowing it and then giving it a dose of weed and feed. Glyphosate kills everything unfortunately. You'd be surprised how much mowing alone improves grass. I usually give mine a feed in early spring, followed by a weed and feed 4 to 6 weeks later. Mowing every week, only taking a little off the height each time, encourages the grass to thicken up and spread sideways, giving you a decent surface.
If the ground's compacted,aerating will help in spring and autumn. An ordinary garden fork pushed in to a good depth will often be all that's needed.
If you wait till the effect of the weedkiller's gone, you could mix some grass seed in with some soil or compost, and sow that over the whole area, making sure it's in contact with the ground by firming it in well, and then watering thoroughly if there's no rain forecast. It won't take long to germinate at this time of year. I'm afraid it won't be suitable to play on this year though. Alternatively, you fork it over, adding some soil and compost, level it and lay turf.