Granddaddy Purple THC Percentage and Yield at a Glance
Granddaddy Purple (GDP) tests between 17% and 23% THC in most lab samples, and the strongest batches reach 26% to 27%. Growers report about 400 to 500 grams per square meter indoors and 400 to 600 grams per plant outdoors, with flowering that finishes in 8 to 10 weeks. CBD stays under 1%.
Granddaddy Purple Flowering Time Indoor: 8 to 10 Weeks
- THC: 17% to 23% (top samples 26% to 27%)
- CBD: 0.1% to 0.5%
- Type: indica-dominant, often listed as 80% indica / 20% sativa
- Indoor yield: 400 to 500 g/m²
- Outdoor yield: 400 to 600 g per plant
- Flowering time: 8 to 10 weeks
What THC Percentage Does Granddaddy Purple Have?
Most dispensary flower lands between 17% and 23%. A batch grown under strong light and pulled at peak ripeness can pass the mid 20s, while an early harvest drops to 14% or 15%. Two jars of the same strain from different farms can sit 6 points apart.
Granddaddy Purple Price Guide: What to Expect Per Ounce
Those swings trace back to genetics, light, harvest timing, and the cure. Lab method matters too. The Granddaddy Purple THC percentage and yield figures you see online are averages drawn from many growers, not fixed traits of the plant.
Flower
Dried flower is the baseline for strain data. Expect 17% to 23% THC and a nose of grape, berry, and sweet earth from myrcene and caryophyllene.
is granddaddy purple indica or sativa
Vapes and concentrates
A GDP vape cartridge lists 70% to 85% THC, but that figure describes the oil, not the flower it came from. The extract packs cannabinoids from material that started near 20%.
Edibles
Edibles skip percentages and print milligrams instead. A single GDP gummy holds 5 mg or 10 mg of THC, which hits harder and lasts longer than the same dose smoked.
How Much Does Granddaddy Purple Yield?
Yield comes from light, root space, and veg time more than from the strain name. GDP is a compact indica, so it rewards training that opens the canopy.
Indoor yield
A 1 square meter tent with a 600W light and four weeks of veg returns about 400 to 500 grams. Short sea-of-green runs with many small plants land near 350 grams per square meter.
Outdoor yield
Outdoor plants in good soil give 400 to 600 grams each. Growers in warm, long-season climates report plants over 2 meters tall that pass 700 grams.
What moves the number
- Light intensity and daily light integral
- Veg length before the flip to 12/12
- Training: topping, low-stress training, screen of green
- Pot size and root health
- Phenotype variation between seeds
- Harvest timing and dry weight loss
Flowering Time and Grow Notes
Indoor GDP finishes in 8 to 10 weeks after the light flip. Outdoor plants in the northern hemisphere are ready by mid to late October.
Buds grow dense and hold moisture, so keep late-flower humidity under 50% and move air through the canopy. Mold takes more weight from a crop than any nutrient problem.
Cool nights near 50°F (10°C) bring out the purple coloring. The trait comes from anthocyanins, and it shows up in leaves and calyxes once temperatures drop.
Why Convenience Decides Which THC Number You Buy
Shoppers pick the format first and the strain second. A pre-roll, a vape, or a 10 mg gummy removes the grinder, the scale, and the guesswork, so the package label becomes the whole decision.
That shift changes what a THC percentage means in practice. A 22% GDP flower is a range of possible doses depending on how much you pack, while a 10 mg edible is one fixed number.
- Pre-rolls: set dose per stick, no gear needed
- Vape cartridges: fast onset, easy to track puffs
- Single-serve edibles: exact milligrams per piece
- Delivery: strain choice narrows to what the driver has
Does a Higher THC Number Mean a Better High?
No. THC sets the intensity, but terpenes and minor cannabinoids shape the feel. GDP leans on myrcene, caryophyllene, pinene, and limonene for its heavy, sleepy profile.
Labels also blur THCA and THC. Total THC = (THCA × 0.877) + THC, so a jar showing 20% THCA and 1% THC lands near 18.5% total THC.
What to Check on a Granddaddy Purple Label
- Total THC, not THCA alone
- Harvest or package date
- Lab name and batch test number
- Printed terpene list, when the brand provides one
- Format and serving size
FAQ
Is Granddaddy Purple an indica or a sativa?
It is an indica-dominant hybrid, bred by Ken Estes in 2003 from Purple Urkle and Big Bud. Listings often put it at 80% indica and 20% sativa.
Does Granddaddy Purple contain CBD?
CBD sits near 0.1% to 0.5%. It is a THC strain, not a CBD product.
How long does Granddaddy Purple take to flower?
Eight to 10 weeks indoors, and mid to late October outdoors in the northern hemisphere.
Is Granddaddy Purple easy to grow?
It suits beginners because the plant stays short and fills a small space. The main task is watching humidity in late flower.
Which gives more, indoor or outdoor?
Per plant, outdoor wins with 400 to 600 grams. Per square meter, indoor wins because plants are packed tight.