Syngenta has made several appointments in its US lawn and garden business. Scott Valentine has been appointed head of marketing services for the turf, landscape and consumer (TLC) business. He was previously marketing services manager for turf and ornamentals. Shawn Potter becomes head of marketing for the TLC business. He was a cereal herbicide brand manager. Howard Jaekle has been named market manager for the home care and consumer business. He was a district manager for turf and ornamentals.