OG #18, also known as "Private Reserve," "Reserve OG," and "OG 18" is a hybrid marijuana strain and a phenotype of OG Kush. OG #18 produces long-lasting sedative effects and pairs well with meditation and relaxation. OG #18 has a distinct diesel kush flavor with sour undertones. This strain was a High Times Cannabis Cup winner in 09' and 10'. Growers say OG #18 has an indoor flowering time of 9 weeks.