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.
Sour Diesel Leaf: A Comprehensive Guide to Lab-Tested CBD
- 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.
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.