Improvements started Tuesday at Butler Field in the park's north end, according to a press release distributed by the music festival.
The work is expected to take seven to 10 days.
"Crews will then conduct periodic fertilizations and inspections, keeping a close eye on newly planted grasses and shrubs, ensuring they take root and are able to grow," the release says.
The promoter of the festival, Austin-based C3 Presents, will cover all costs related to the improvements, estimated by C3 at approximately $150,000.
The work is overseen by the Chicago Park District and carried out by Chicago-based landscapers.
About 300,000 concertgoers attended this year's Lollapalooza festival over the August 3 weekend.
Festival attendees were evacuated from the park on Saturday afternoon, August 4, due to severe thunderstorms, but, according to C3, there was no repeat of the substantial sod damage seen after the 2011 edition of Lollapalooza.