Quick answer
Gorilla Glue #4 (GG4) tests at 18% to 25% THC. Top lab reports reach 28% to 32%. Indoor gardens yield 400 to 600 grams per square meter, about 1.3 to 2 ounces per square foot. Outdoor plants in full sun give 600 to 1000 grams each. Flowering runs 8 to 9 weeks indoors and ends in October outdoors in most US climates.
THC and cannabinoid content
- THC: 18% to 25% for most samples; 28% to 32% on the highest COAs.
- CBD: below 0.2%.
- CBG: 0.1% to 0.3%.
- Total terpenes: 1% to 2%. Caryophyllene, myrcene, and limonene lead the profile.
THC percentage measures dry flower weight. It is not a fixed trait. Two clones from one mother plant can test 3 to 5 points apart when grown in different rooms. Light intensity, harvest timing, and the dry and cure method all move the number.
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Indoor yield
GG4 is a heavy yielder indoors. A 4 by 4 foot tray with 9 plants under 600 watts of LED or HPS returns 450 to 700 grams of dry flower after 4 to 6 weeks of vegetative time.
Two traits cap the yield: stretch and leaf density. The plant doubles in height during the first 3 weeks of flower. Growers who wait too long to flip run out of headroom and burn the top colas. Defoliation at day 21 and day 42 of flower opens bud sites and cuts mold risk in the lower canopy.
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Outdoor yield
Outdoor plants reach 2 to 3 meters (6 to 10 feet) in a long season. Yield runs 600 to 1000 grams per plant. Large plants in warm, dry climates pass 1500 grams. Transplant after the last frost. Harvest in mid to late October across most of the US.
Dense buds hold moisture. In humid states, bud rot takes the largest colas first. Spacing, trellising, and a rain cover protect more weight than extra fertilizer.
Genetics and name
GG4 comes from Chem Sister, Sour Dubb, and Chocolate Diesel. Joesy Whales of GG Strains selected the cut in 2014. It took first place at the Los Angeles Cannabis Cup in 2014 and the Michigan Cannabis Cup in 2015. In 2018 GG Strains renamed the strain Original Glue after a trademark dispute with the Gorilla Glue adhesive company. Dispensaries still use both names on the same flower.
How to read a THC label
The THC number on a package comes from one sample of one batch. State testing rules differ, and studies of legal markets in Colorado and California found gaps between labeled potency and independent lab results. Ask for the batch COA (certificate of analysis). Check the harvest date and the terpene panel. Terpene content predicts the feel of the high better than a one point THC difference.