RK
Yumboldt cannabis seeds packaging β€” Royal King Seeds South Africa
IndicaAuto
THC 15%
⏱ Quick Finish
IndicaAutoflowerIn Stock

Yumboldt Auto

Buy Yumboldt Auto seeds in South Africa. Indica Β· 15% THC Β· relaxed, sleepy, happy. Every figure on this page is sourced, and every order ships unbranded.

Select Pack Size
R186.16ZAR
1
πŸ‡ΏπŸ‡¦Free South Africa Delivery
🌱Germination Cover
πŸ”’Nothing on the Box
βš—

Royal King Genetics β€” Seed-Lot Testing

Figures below come from our own seed-lot testing rather than breeder marketing, taken from a single batch tested 2026-09-14 on 475 seeds.

Germination rate: 96.8% (n=475)
Last QC test date: 2026-09-14
Indoor yield: 499-644 g/mΒ² (avg across 15 verified grower reports)
Outdoor yield: 631-902 g/plant (avg across 6 verified grower reports)

About Yumboldt Auto

South Africa is really two growing countries, and Yumboldt does not behave the same way in both. North and east of the escarpment the rain arrives in summer, so this 71/29 indica does its flowering while the air is still heavy; in the Western Cape the rain comes in winter, so the same plant ripens through a dry autumn instead. Dense indica flowers at 15% THC are the wrong shape for a wet summer finish. Between Durban and Richards Bay, once humidity sits above 65% for days at a stretch, botrytis reaches the core of a cola before anything shows on the surface β€” defoliate early, space plants wider than feels necessary, and keep air moving under the canopy. That same density turns into an advantage on the Highveld: above 1 400 m the autumn nights go cold and dry, linalool sharpens as the temperature drops, and a compact frame shrugs off a Free State storm that would flatten something taller.

The Aromatic Three

Leading with Linalool, then Myrcene, and Caryophyllene underneath.

Difficulty: easy. In flower for 50-60 days. Stands Short. Indoors it returns up to 300 g/m2. Outdoors, up to 350 g/plant a plant.

Effects

😌Relaxed
😴Sleepy
😊Happy

Reach For It When

✦ Evening
✦ Relaxation
✦ Sleep Support

Strain Type

Indica 71%Sativa 29%

At a Glance

🧬Potency15% - 19% (Medium-High)
🌿ParentsAutoflowering Indica-Dominant Hybrid (Undisclosed Lineage)
πŸ”¬Seed TypeAutoflower Indica
🌑SuitsAnywhere β€” it runs on its own clock
πŸ“…Cut Inβ‰ˆ 10 – 11 weeks from seed, whenever you plant
πŸ“Grows ToShort
βš–οΈTypical ReturnMedium
🏠Under Lightup to 300 g/m2
🌳In the Groundup to 350 g/plant
⏱Weeks in Bloom50-60 days

In the Packet

Reseals +
RK
Royal King Seeds
Autoflowering
Regular
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
Yumboldt Auto
royalkingseeds.co.za
IG
FB
X
πŸ”’Factory-sealed
πŸ’§Water-resistant outer
πŸ›‘οΈFoil-lined inside
🏷️Tamper sticker
πŸ“±QR check
πŸ”’Scratch-off serial

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Yumboldt Auto β€” 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
F5
Generations
5+
Breeding Programme
Autoflower Programme β€” five-generation auto trait fixing
Stabilisation Notes β€” What This Means for Your Grow

Yumboldt is our F5 autoflower line. Five rounds of selection have fixed both the autoflower trigger and the indica relaxation profile the cultivar is known for. The recessive ruderalis trait demands this depth of work to express uniformly.

Breeding Goal

Stabilise the recessive ruderalis trait in Yumboldt for uniform auto-trigger.

Selection Focus

Chosen for trichome coverage, stout structure and consistent flowering time across the pack.

Pollen / Mother Source

Royal King Genetics elite-cut archive β€” pollen from a maintained S1 line of the original elite mother.

Last Batch QC Verified
23 September 2026Β· 95% germination guarantee