Sweet Diesel is a cultivar of unconfirmed origins with multiple accounts of its parentage. Some online sources believe it to be a sweet-smelling phenotype of Sour Diesel, while others think the strain is a combination of Original Diesel crossed with a Sweet Tooth and Peyote Purple combo. Another source believes the strain to be a cross of Sour Diesel and OG Kush.

The top reported aromas of the Sweet Diesel strain are tart, earth, and fuel. It is said to taste like herbs, diesel, and tart citrus.