2024 Chicago Flower And Garden Show – The Pennsylvania Horticultural Society (PHS) unveiled the theme of the 2024 PHS Philadelphia Flower Show: United by Flowers. This year’s theme honors this flower-filled world and all the unique people . The 2024 Philadelphia the 2024 show. Seth Pearsoll, PHS’s vice president and creative director, said visitors can expect a massive, immersive, and flower-filled entrance garden, plus large .