
OG Chem Feminised
OG Chem Feminised for South African growers — sativa genetics at 20% THC, reported as euphoric, happy, uplifted. Sourced grow figures on the page, plain packaging, delivered nationwide.
Royal King Genetics — Seed-Lot Testing
Figures below come from our own seed-lot testing rather than breeder marketing, taken from a single batch tested 2026-03-30 on 100 seeds.
About OG Chem Feminised
The way to plan OG Chem is backwards from the day you intend to cut, with Up to 400g/m² per square metre indoors and Up to 500 gr per plant outdoors as the figures you are working toward, at 20% THC. Count 55-65 days back from that date and you have your flip date. This one does not dump its weight in a fortnight the way a short indica will; it adds through the whole bloom. Growers who panic about autumn rain and chop a fortnight early routinely hand back a fifth of the crop. Depending on your province the honest window runs from late March into May, and the limonene-led profile only arrives in the last fourteen days.
Where the Weight Actually Comes From
Yield on OG Chem — the Up to 400g/m² indoors and Up to 500 gr outdoors quoted above — is decided in three short stretches of the 55-65 days bloom rather than evenly across it.
The first ten days after the flip. Whatever stretch happens here sets your canopy, and an uneven canopy wastes light for the remainder of the grow. Stretch runs to 50-60% of pre-flower height. Supercrop anything breaking the canopy line inside the first week or you will be lighting empty air.
Weeks three to five. This is when limonene production climbs, and it answers to the gap between day and night temperature rather than to either number on its own. Keep at least 6-8°C between them. Outdoor growers in the interior provinces get that swing free in March and April; indoors, aim for 25-26°C lights-on against 18-20°C lights-off, with potassium-led bloom feed at EC 1.6-1.8.
The last ten to fourteen days. Stop feeding, flush with pH-corrected water, and read trichomes daily under a 60x loupe. Cut at 5-10% amber, before the clear-headed character starts sliding toward sedation. Outdoors that usually lands between late March and mid-April.
Difficulty: easy. In flower for 55-65 days. Stands 90-120 cm. Medium. Indoors it returns Up to 400g/m². Outdoors, Up to 500 gr a plant.
What OG Chem Is Like to Use
The effects most commonly reported for this cultivar are euphoric, happy, uplifted. At 20% THC it sits in a bracket where there is a usable working range. Vaporised between 175°C and 185°C it lifts mood and mental energy in a way that suits creative work, a hike, or a long afternoon around a braai. The body stays light, so for anyone with a THC tolerance it holds up as a daytime option. The Limonene/Terpinolene pairing leaves a zesty, clean aftertaste on the palate.
Where it fits: creative work, company, being outdoors, and unstructured daytime hours.
The Aromatic Three
Leading with Limonene, then Terpinolene, and Pinene underneath. How this combination survives the move from flower to vapour or smoke is not a given. Held low, at 180-188°C, the terpinolene and pinene notes stay legible with limonene underneath them. Run it hotter, or burn it, and the three collapse into one — still pleasant, but without the separation that makes this cultivar worth paying attention to.
Suitability and Recommendations
OG Chem is a reasonable fit for growers with the basics already in place. Understand pH, know roughly what nutrient ratios do, and be able to hold a light cycle — it will not carry you, but it does not punish the occasional slip either. Photoperiod genetics leave size and timing in your hands — hold it in veg for a bigger plant, or flip early when headroom is the constraint. A September-to-May outdoor season comfortably covers a 55-65 days bloom in the frost-free provinces. Posted discreetly anywhere in South Africa, with sourced grow figures shown on every strain page.
Effects
Reach For It When
Strain Type
At a Glance
In the Packet
Feminised Premium
Seeds
the source
inside
number
Related Strains

Overlord OG Feminised
Buy Overlord OG Feminised seeds in South Africa. Indica · 26% THC · energetic, euphoric, sleepy. Every figure on this page is sourced, and every order ships unbranded.

Paris XXX Feminised
Paris XXX Feminised for South African growers — indica genetics at 20% THC, reported as creative, focused, calm. Sourced grow figures on the page, plain packaging, delivered nationwide.

707 Headband Feminised
Buy 707 Headband Feminised seeds in South Africa. Sativa · 22% THC · euphoric, creative, uplifted. Every figure on this page is sourced, and every order ships unbranded.

OG #18 Feminised
Buy OG #18 Feminised seeds in South Africa. Sativa · 20% THC · happy, energetic, creative. Every figure on this page is sourced, and every order ships unbranded.
OG Chem Feminised — Breeder Information
Royal King GeneticsRecreated and stabilised by Royal King Genetics , the breeding team behind this catalogue. Seed lots are germination-tested before they ship. More on the breeding process and about page.
OG Chem began life as a clone-only cut. Translating a clone into seed without losing the long-flowering uniformity demands backcrossing — we crossed our chosen pheno back to the parental line three times (BX3) to fix the elite mother into stable seed form.
Recreate the OG Chem clone-only cut in stable seed form.
Chosen for clear-headed terpene expression, structural manageability and a finish that lands inside the published window.
Royal King Genetics select-mother programme — pollen drawn from an internally maintained reversed-female line.