Royal Runtz Auto by Royal Queen Seeds
Royal Runtz Auto by Royal Queen Seeds takes the breeder’s photoperiod Royal Runtz and turns it into a smaller, faster automatic while keeping the sweet fruit character that made the original so popular.
The genetics are:
Royal Runtz × Ruderalis
And because Royal Runtz itself comes from Gelato × The Original Z, there’s some seriously modern American genetics sitting behind this Auto.
Royal Queen Seeds lists the finished variety at 50% Sativa, 45% Indica and 5% Ruderalis, with THC reaching up to 19%.
The flavour stays exactly where you’d expect from the Runtz family: sweet, fruity and candy-like.
At SeedMasters.com, we see Royal Runtz Auto as the more compact member of the Royal Runtz family. It doesn’t match the photoperiod’s headline THC figure, but it retains the genetics and unmistakable sweet-fruit identity that matter most.
Royal Runtz Goes Automatic
To understand Royal Runtz Auto, it’s worth going back one generation.
The original Royal Runtz comes from:
Gelato × The Original Z
Royal Queen Seeds then crossed Royal Runtz with Ruderalis genetics, followed by further selection to stabilise the automatic offspring.
That gives Royal Runtz Auto a family tree containing two of the biggest names in modern American cannabis.
Gelato hardly needs an introduction anymore. Its influence can be found across countless contemporary hybrids, particularly those selected for sweetness, resin and colourful flowers.
The Original Z – historically also known as Zkittlez – became equally influential thanks to its intensely fruity, candy-like character.
Royal Runtz combines the two.
Royal Runtz Auto takes that genetic family and introduces the autoflowering trait.
Up to 19% THC
Royal Queen Seeds currently lists Royal Runtz Auto at:
Up to 19% THC
CBD is low.
That’s noticeably lower than the up to 27% THC quoted for photoperiod Royal Runtz, so we wouldn’t blur the specifications between the two.
They’re different products.
And we’d argue that chasing the photoperiod’s THC figure isn’t really the point of Royal Runtz Auto anyway.
The automatic version has its own identity, combining a compact format and shorter overall cycle with recognisable Runtz genetics.
Royal Queen Seeds describes its character as:
Long-lasting · Uplifting
The breeder also describes a relaxing quality alongside the brighter side of the strain.
As always, the THC percentage and characteristics are breeder-supplied reference information rather than guaranteed figures for every individual expression.
Sweet, Fruity Runtz Terpenes
This is probably the least surprising part of Royal Runtz Auto.
It’s sweet.
Very sweet.
Royal Queen Seeds highlights sweet and fruity terpenes, carrying across the sort of flavour profile associated with the photoperiod Royal Runtz.
That makes sense when you follow the family tree backwards.
Royal Runtz comes from Gelato and The Original Z – two genetics closely associated with the sweeter end of modern American cannabis.
Royal Runtz Auto doesn’t suddenly abandon that identity just because Ruderalis has entered the picture.
At SeedMasters.com, we’d describe the profile as ripe fruit and sugary candy sweetness with the distinctive modern character you’d expect from Runtz genetics.
We wouldn’t overcomplicate it.
Sweet fruit is the main event here.
Purple and Green Runtz Flowers
Royal Queen Seeds describes Royal Runtz Auto as producing attractive purple-green flowers.
That colour combination works particularly well alongside the heavy trichome coverage associated with the Runtz family, giving the flowers a properly modern appearance.
Despite its photoperiod parentage, the Auto remains fairly compact.
RQS currently gives an indoor height of:
70–100cm
Outdoor height is listed at:
70–120cm
Flowering takes approximately:
50–55 days
The complete cycle is approximately:
70–75 days
Indoor production is listed at 350–450g/m², while outdoor production sits at approximately 70–100g per plant.
For SeedMasters.com customers, these figures are included purely as breeder-supplied reference information for identifying and comparing collectible cannabis genetics.
Royal Runtz vs Royal Runtz Auto
Because SeedMasters.com carries both versions, it’s worth making the distinction clear.
Royal Runtz is the feminized photoperiod original. It comes from Gelato × The Original Z, has a balanced 50/50 Sativa-Indica classification and reaches up to 27% THC according to RQS.
Royal Runtz Auto is the automatic descendant.
RQS crossed Royal Runtz with Ruderalis genetics, resulting in a 50% Sativa / 45% Indica / 5% Ruderalis composition and a maximum THC figure of 19%.
So this isn’t simply Royal Runtz in a different packet.
It’s a separate expression of the same genetic family.
The photoperiod is substantially stronger on paper.
The Auto is smaller, quicker and carries the automatic trait.
Both retain that recognisable sweet-fruit Runtz character.
Royal Runtz Auto at a Glance
Breeder: Royal Queen Seeds
Strain: Royal Runtz Auto
Genetics: Royal Runtz × Ruderalis
Royal Runtz Background: Gelato × The Original Z
Seed Type: Feminized Autoflower
Type: 50% Sativa / 45% Indica / 5% Ruderalis
THC: Up to 19%
CBD: Low
Flowering Time: Approximately 50–55 days
Overall Cycle: Approximately 70–75 days
Indoor Height: Approximately 70–100cm
Outdoor Height: Approximately 70–120cm
Indoor Production: 350–450g/m²
Outdoor Production: 70–100g per plant
Flavour: Sweet and fruity
Character: Long-lasting and uplifting
Appearance: Resinous purple-green flowers
Notable Trait: Automatic descendant of RQS’s Gelato × Original Z Royal Runtz
Our Take on Royal Runtz Auto
At SeedMasters.com, we think Royal Runtz Auto makes most sense when you look beyond the THC percentage.
Yes, the photoperiod Royal Runtz reaches up to 27% THC, while the Auto tops out at 19%.
That’s a significant difference.
But it doesn’t make Royal Runtz Auto a lesser version of the same product. They’re aimed at preserving different characteristics from the same family.
What matters here is what’s sitting behind the name.
Gelato.
The Original Z.
Royal Runtz.
Those are thoroughly modern genetics, and RQS has managed to bring their sweet, fruity character into an automatic format without making the family tree unnecessarily complicated.
We also like that the genetic composition remains almost perfectly balanced at 50% Sativa and 45% Indica, with just 5% Ruderalis.
Then there’s the appearance.
Purple-green flowers covered in resin fit the Royal Runtz name perfectly.
For collectors browsing the Royal Queen Seeds range at SeedMasters.com, we’d put this firmly in the modern USA genetics camp.
It’s not an old-school Skunk.
It’s not a classic Afghan.
And it isn’t pretending to be.
Royal Runtz Auto is Gelato and Original Z heritage wrapped into a compact automatic, with sweet fruit, colourful flowers and up to 19% THC.
That’s exactly where its appeal lies.
Royal Runtz Auto cannabis seeds sold by SeedMasters.com are intended strictly as adult collectible souvenirs and for genetic preservation purposes only. Please check and comply with the laws applicable in your country or region before purchasing.
