Posted: Yesterday at 15:39
No to rotovating. It makes a mess, disperses weeds and does nothing good for your lawn.
i would dig it all over. However, you could apply a glyphosate weedkiller and then vigorously rake it. A cultivator is a good tool...will scrape a little deeper than a rake. Rake it level,,remove stones, and weed roots remaining.
if you have ants it suggests to me it is very dry there....?
wait until first week or so of September and apply a granular feed and rake it in. A week or so later sow grass seed. Keep it well watered until germination.
this will solve your bumps,,hollows and preserve your lawn mower.