how did walter poison brock

In 'Breaking Bad', Walter White uses a plant called Lily of the Valley to poison Brock. He had the poison administered to Brock through a juice box in his lunch, leading to Brock's sickness. Walter masterfully set up this plot to make Jesse believe that Gus was behind the poisoning, causing Jesse to turn against Gus and join Walter again.

Walter White, in the renowned series 'Breaking Bad', turns to a subtler, yet extremely cold-blooded method to manipulate Jesse Pinkman—by poisoning a child, Brock. To this end, Walter uses a toxic plant named Lily of the Valley. The show doesn't exactly depict how Walter gets the poison to Brock, but the generally accepted explanation is by lacing Brock's juice box with the extracted toxin from Lily of the Valley’s berries.

As Brock falls seriously ill, Jesse mistakenly blames his girlfriend Andrea's son for poisoning with Ricin, while in reality, it was Walter’s manipulative plan to make Jesse believe that Gus Fring, Walter's enemy, was behind the poisoning.

In the popular TV series 'Breaking Bad', Walter White poisoned Brock, a young boy associated with Jesse Pinkman, using a plant known as Lily of the Valley. The exact method of delivery isn't shown in the series, but it is heavily suggested that the poison was administered through Brock's juice box at lunch. The entire act was a part of Walter's twisted plot to manipulate his partner, Jesse Pinkman, by making him believe that their enemy, Gus Fring, was responsible for Brock's sudden illness.