RK
Yumboldt cannabis seeds packaging β€” Royal King Seeds New Zealand
IndicaAuto
THC 15%
⏱ Quick finisher
IndicaAutoflowerIn Stock

Yumboldt Auto

Growing Yumboldt Auto in New Zealand: a indica at 15% THC, relaxed, sleepy, happy. Flowering window and height are on the page where we hold them, blank where we do not.

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$19.79NZD
1
πŸ‡³πŸ‡ΏFree Over $150
🌱Replaced If It Fails
πŸ”’Nothing On The Box
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What the seed lot did on the bench

Every lot is checked before it goes on the shelf, and the yield figures come from New Zealand growers who sent us a harvest weight against a batch code. This lot was read on 2026-09-14, from a tray sample of 300.

Opened on the bench: 96.8% of 300
Lot checked: 2026-09-14, at 20-23Β°C
Under lights here: 439-565 g/mΒ², across 13 grower reports
Outside here: 407-599 g/plant, across 7 grower reports

Outdoor figures come from a New Zealand season, so they run below what the same cultivar reaches somewhere with a longer, drier autumn. Treat them as what this plant does here. The full report for this lot sets out the method and the terpene panel.

About Yumboldt Auto

Latitude decides more about a Yumboldt crop than anything you buy. New Zealand runs roughly 34 to 47 degrees south, and that span turns one 71/29 indica into two different plants: a Kaitaia grower fights airflow and humidity through a muggy February, while a Southland grower is counting the weeks to first frost. Neither problem is about heat. If frost rather than heat is your limit, the strain finder sorts the catalogue by finishing time.

Growing Yumboldt in New Zealand Conditions

Indoors the outside world stops mattering and the job is control. Outdoors it is the whole brief.

Upper North Island β€” Northland, Auckland, Waikato, Bay of Plenty. The longest season in the country and the wettest finish. Bud rot, not sunshine, is what costs you a crop here, so plant where morning air moves and thin the interior early rather than admiring a dense canopy in January. Tight indica flower structure is the risk factor to manage, and it is manageable.

Lower North Island. Hawke's Bay and Gisborne are the driest and sunniest stretch; Taranaki, ManawatΕ« and Wellington trade that for rain and wind. Wind decides how tall you let a plant get more than the genetics do.

South Island. Nelson, Tasman and Marlborough offer the best outdoor conditions nationally β€” high sunshine hours, low summer rainfall. Canterbury, Otago and Southland run a genuinely short season where flowering runs 50-60 days is the number that matters, because everything is a race against the first frost. An autoflower sidesteps this by finishing on its own clock. If your season is short, the autoflowering indica list is the better starting point.

What Yumboldt Is Like

Reported effects cluster around relaxed, sleepy, happy. At 15% THC that is a meaningful figure rather than a decorative one, and the sensible approach with anything in this range is to start lower than you think and wait longer than feels necessary.

The 71/29 balance shapes where it lands: body-forward, better suited to an evening than a task list. Tolerance moves this more than any other variable, which is why two people describe the same jar differently.

Prefer something gentler? The CBD-forward strains range trades peak potency for balance.

The Terpenes

Linalool leads, myrcene sits behind it, and caryophyllene runs underneath.

This trio is a common signature in well-regarded cultivars, which is not an accident: linalool carries weight, myrcene adds definition, caryophyllene keeps it from being one-note. It reads clearly on a first opening rather than needing to be hunted for.

Who It Suits

Yumboldt is rated easy. That makes it a reasonable first grow β€” it survives inconsistent watering and imprecise feeding without collapsing, which is what a first season mostly consists of. Being an autoflower removes light-cycle management entirely, which suits balcony growers and anyone wanting a fast turnaround.

Shipped nationwide in plain packaging. Every strain page carries whatever grow data we could actually source, and nothing we could not.

Published Figures

  • Finishes in 50-60 days
  • Under lights: up to 300 g/m2
  • Grown out: up to 350 g/plant
  • Height: Short
  • Difficulty: easy

Reported Effects

Descriptive, and ordered by how prominently each one appears in the sources we hold. Not a survey, and not a measurement.

😌Relaxed
Most prominent in the descriptions we hold
😴Sleepy
Reported alongside it
😊Happy
Reported alongside it
🀀Hungry
Reported alongside it
πŸ€—Euphoric
Reported alongside it
🧘Calm
Reported alongside it
🌟Settled
Reported alongside it
πŸ’†Body High
Reported alongside it
πŸ˜Άβ€πŸŒ«οΈSedated
Reported alongside it

Best For

✦ Evening
✦ Relaxation
✦ Sleep Support

Where It Sits

Indica 71%Sativa 29%

The Numbers

🧬THC15% - 19% (Medium-High)
🌿Comes fromAutoflowering Indica-Dominant Hybrid (Undisclosed Lineage)
πŸ”¬LeansAutoflower Indica
🌑WantsAll climates (adaptable)
πŸ“…Comes downβ‰ˆ 10 – 11 weeks from seed (typical)
πŸ“Gets toShort
βš–οΈCarriesMedium
🏠Under lightsup to 300 g/m2
🌳In the groundup to 350 g/plant
⏱Time in bloom50-60 days

How it arrives

Resealable +
RK
Royal King Seeds
Autoflowering
Regular
Seeds
Stored properly
Rigid vial
Resealable +
Sold to adults as souvenir stock and for keeping genetic lines intact. Establishing what the law where you live permits, and staying inside it, sits with the buyer.
1
Yumboldt Auto
royalkingseeds.co.nz
IG
FB
X
πŸ”’Sealed, so tampering shows
πŸ’§Damp-proof outer layer
πŸ›‘οΈFoil lining inside
🏷️Tamper sticker
πŸ“±QR code on the pack
πŸ”’Scratch-off serial

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Where Yumboldt Auto Comes From

We hold no documented parentage for this cultivar, so none is shown. A blank here is an admission rather than an oversight β€” we would rather leave it empty than publish a lineage we cannot stand behind.

We did not originate the cultivars in this catalogue and do not claim to have. What we do is select and stabilise the lines we sell, so that a pack grows out more uniformly than an unworked one β€” which matters more in New Zealand than in most places, because an outdoor grower here is working to a frost date rather than an open-ended season. The stabilisation programme sets out how that works and what it does not cover.

Every pack is covered by our germination promise: follow the method in the germination guide and seed that fails to open is replaced free within 30 days.