Good hair starts at the scalp! Korean scalp-care brand Dr. Groot is taking over Union Square with an immersive Scalp Lab, inviting New Yorkers to get hands-on with its regimen and discover the science behind thicker, fuller-looking hair. Stop by September 16-17 to explore the collection, experience the brand's signature fragrance, and score free deluxe Dr. Groot samples and playful shampoo-shaped popsicles, plus an exclusive Sephora gift with purchase. Consider it a crash course in Korean scalp care — with plenty of freebies along the way.

• Free Dr. Groot Scalp Lab Pop-Up Details

Location: Union Square Plaza, Broadway Between East 17th-18th Streets, New York, NY 10011