Sour Diesel Plant: The Short Answer
Sour Diesel is a sativa-dominant cannabis cultivar with a pungent diesel and citrus aroma and a high THC content, usually 19% to 26%. It is a THC strain, not a CBD strain. Most Sour Diesel flower sold in dispensaries carries far more THC than the 0.3% federal limit for hemp, so it falls under state cannabis rules, not hemp law. Shoppers who want CBD should look for a hemp cultivar or a Sour Diesel cross bred to hold THC near zero.
Plant Traits
- Lineage: Chemdawg 91, Super Skunk, and Northern Lights are the parents most sources list.
- Structure: tall, branchy, and stretchy, with long spaces between nodes.
- Flowering time: about 9 to 11 weeks indoors.
- Aroma: diesel fuel, citrus peel, and sharp skunk.
- Bud shape: long, foxtailed colas with light green calyxes and orange pistils.
- Cannabinoids: high THC, very low CBD.
How to Grow a Sour Diesel Plant
Indoor growers get tighter control over height and aroma. Outdoor growers need a long warm season and low humidity during flower.
- Start with a seed or clone that matches your goal. Choose a THC Sour Diesel only where state law allows it; choose a hemp Sour Diesel cross for CBD production.
- Germinate seeds in moist paper towels or starter cubes at 70 to 80 F, then move sprouts into small pots under 18 hours of light.
- Top the plant once it reaches four to five nodes. This controls the stretch and creates more bud sites.
- Run the vegetative stage for 4 to 6 weeks at 18/6 light. Feed a balanced nutrient mix and keep pH near 6.0 in soil or 5.8 in coco.
- Switch to a 12/12 light cycle to trigger flower. Expect the plant to double in height during the first three weeks.
- Train branches with low stress tying or a screen during the stretch. Keep the canopy even so light reaches every cola.
- Hold humidity between 40% and 50% in mid flower to lower mold risk on dense colas.
- Flush with plain water for the last 7 to 10 days, then harvest when trichomes turn cloudy with a few amber heads.
- Dry in the dark at 60 to 70 F and 55% to 60% humidity for 7 to 10 days, then cure in jars for at least two weeks.
THC vs CBD in Sour Diesel
Sour Diesel is bred for THC, so its CBD content sits near zero. A lab test on standard Sour Diesel shows THC well above the hemp threshold. Hemp breeders have crossed the strain with low-THC lines to make Sour Diesel CBD flower, which keeps the diesel aroma while pushing THC under 0.3%. Read the certificate of analysis before you buy. THC percentage, CBD percentage, and total cannabinoid content should be listed per batch, not per product line.
Sour Diesel Hybrid CBD Guide: THC, CBD, and Lab Checks
US Legal Check
Federal law defines hemp as cannabis with no more than 0.3% THC on a dry weight basis. Anything above that is marijuana under federal law and is regulated by the state. Before you buy or grow a Sour Diesel plant, check your state rules on plant counts, home cultivation, and hemp licensing. If you want a CBD product, buy hemp-derived flower or extract with a current lab report.