Now is the time for a good clean up. Rake all debris from lawn to allow sun to encourage growth. Keep mower blades high. September Add gypsum or liquid clay breaker to encourage penetration of water to the roots. Oversow bare patches of lawn.
Feed lawns now.
If moss is still prevalent, treat it with sulphate or iron. It is also a good time to sow new lawns. October Weed, feed and regularly mow lawns. Adjust the height of the mower so lawns are not mowed too low. New lawns can still be planted.