XJ-13 cannabis seeds packaging — Royal King Seeds South Africa
Hybrid
THC 23%
🎨 Heady
HybridFeminisedIn Stock

XJ-13 Feminised

A hybrid testing at 23% THC, XJ-13 Feminised is reported energetic, happy, relaxed. Grown right across the country, from the Cape to the Lowveld. Discreet nationwide delivery and a germination guarantee.

Select Pack Size
R228.51ZAR
1
🇿🇦Free South Africa Delivery
🌱Germination Cover
🔒Nothing on the Box

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 2026-03-31 on 250 seeds.

Germination rate: 99.1% (n=250)
Last QC test date: 2026-03-31
Indoor yield: 404-552 g/m² (avg across 16 verified grower reports)
Outdoor yield: 650-962 g/plant (avg across 3 verified grower reports)

About XJ-13 Feminised

Will XJ-13 handle a South African summer outdoors? Yes. Put this 50/50 hybrid in the ground between September and November and you will be cutting from March to May. The balanced genetics take what the country gives them, from coastal humidity in KwaZulu-Natal through to dry Karoo heat. Bloom runs 9-10 weeks, placing harvest between March and May across most provinces.

What yield is realistic? Up to 650 gr./m2 indoors is reachable under decent LED with steady feeding. Outdoors, Up to 800 gr./plant a plant is normal in 50 litre pots or straight into prepared ground in full sun. At 23% THC with limonene in front, the return on effort is good.

How much can go wrong before it shows? Some. Anyone who understands pH, a feeding schedule and a light cycle will be fine. Neglect it entirely and it will suffer, but a single missed watering will not undo the grow.

Further Questions from South African Growers

Which medium suits it best? Depends what you are optimising for. Organic soil cut with 30% perlite and amended with bone meal, rock phosphate and kelp meal gives the fuller flavour, and all three are stocked by garden centres, agricultural co-ops and hydro shops countrywide. Coco under automated fertigation at EC 1.4-1.8 through bloom gives the bigger number. This hybrid genetics performs in either.

Does it cope with real summer heat? Well enough, on hybrid vigour. Keep the root zone under 28°C with mulch or pale pots, and do not transplant during a heatwave.

When do I switch to bloom feed? As soon as pistils show, not a fortnight later. The 50/50 genetics changes its demand sharply at the transition: phosphorus and potassium uptake rises while nitrogen demand falls away. Soil growers can top-dress with guano and sulphate of potash; coco and hydro growers should move to a low-N, high-PK formula immediately.

Indoors or outdoors? Indoors buys control over the 9-10 weeks environment. Outdoors, across a September-to-May season, gives you sunlight intensity no LED at any price reproduces, and the full Up to 800 gr./plant. Difficulty: intermediate. In flower for 9-10 weeks. Stands over 185 cm tall if left untrained. Indoors it returns Up to 650 gr./m2. Outdoors, Up to 800 gr./plant a plant.

Aroma, Flavour and Effect

The first thing XJ-13 does at 23% THC is lift it with a bright, nearly effervescent citrus. The energetic, happy, relaxed effects follow within minutes, across head and body at once. Thinking stays clear while muscle tension drains off, which leaves the dose as the deciding factor — light for the afternoon, heavier and it moves into the evening without a jolt. Caryophyllene sits underneath all of it, adding a grounding warmth that keeps the whole thing anchored.

The Aromatic Three

Leading with Limonene, then Caryophyllene, and Linalool underneath. This trio turns up repeatedly in cultivars that win things, and it is why a jar of XJ-13 tends to get a reaction the first time it is opened after curing. Limonene sets the anchor, caryophyllene fills the middle, and linalool sits in the background doing the work that separates this from every other strain built on the same primary terpene.

Suitability and Recommendations

Who does well with XJ-13? Indoor growers who want the harvest date to be their decision. Outdoor growers who want to choose the moment flowering starts. Anyone with the room and the patience to veg it properly before flipping. It is rated intermediate, which in practice means a moderate learning curve that rewards attention without needing laboratory conditions. Sent nationwide in plain, unbranded packaging, with sourced grow data on every strain page.

Effects

🤑Energetic
😊Happy
😌Relaxed

Reach For It When

Anxiety
Anytime
Depression
Pain

Strain Type

Indica 50%Sativa 50%

At a Glance

🧬Potency23% - 27% (High)
🌿ParentsJack Herer × G13 Haze
🔬Seed TypeFeminised Hybrid
🌡SuitsMost of the country
📅Cut InMarch – May outdoors, planted Sept – Nov
📏Grows Toover 185 cm tall if left untrained
⚖️Typical ReturnTypical for type
🏠Under LightUp to 650 gr./m2
🌳In the GroundUp to 800 gr./plant
Weeks in Bloom9-10 weeks

In the Packet

Reseals +
RK
Royal King Seeds
Photoperiod
Feminised Premium
Seeds
Inside the Packet
Sealed vial
Reseals +
Royal King Seeds sells seed as an adult collectible and for the preservation of genetics. Knowing and following the law where they live.
1
XJ-13 Feminised
royalkingseeds.co.za
IG
FB
X
🔒Factory-sealed
💧Water-resistant outer
🛡️Foil-lined inside
🏷️Tamper sticker
📱QR check
🔢Scratch-off serial

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XJ-13 Feminised — Breeder Information

Royal King Genetics

Recreated 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.

Stabilisation Level
F3
Generations
3+
Breeding Programme
F3 Refinement Programme — three-generation selection
Stabilisation Notes — What This Means for Your Grow

XJ-13 runs through our F3 programme. Most of the pack expresses the target pack-to-pack uniformity cleanly; the F3-to-F4 cycle is where we close out the last remaining off-types.

Breeding Goal

Cull off-type phenos in XJ-13 at F3 to lock the cross profile.

Selection Focus

Chosen for terpene profile, vigour, structure and finish-time consistency.

Pollen / Mother Source

Royal King Genetics in-house breeder room — pollen taken from a generation-tracked sibling-male line.

Last Batch QC Verified
27 December 2025· 95% germination guarantee