Royal Critical Automatic by Royal Queen

Royal Critical Automatic strain photo
Type ruderalis/indica/sativa · autoFlower ±63 daysCross Critical × Ruderalis

Look, I know a lot of old heads still talk trash about autoflowers, but Royal Queen Seeds seriously knocked it out of the park with Royal Critical Automatic. Honestly, if you're looking for stupid heavy yields without the headache of light schedules, this is the one. They took the legendary Critical—which is already a beast of an Afghani/Skunk cross—and mashed it up with some Ruderalis to make it run on autopilot. No fuss, no flipping lights, just plant the seed and watch it go nuts. It’s the ultimate lazy grower's dream.

In the tent, this thing just flat out performs. It stays pretty short, maybe like two or three feet tall tops, making it perfect if you're running a stealth closet setup or just don't have the headroom. But don't let the size fool you. The buds get ridiculously fat and dense. I'm talking actual baseball bats of weed in like nine weeks from seed. Yeah, nine weeks. It's so fast you barely have time to screw it up. Plus, the structure is solid enough that you don't even need to stake it up unless it gets totally out of control.

The smoke is where it really shines though. It's got this super sweet, skunky citrus thing going on with a weirdly awesome caramel finish. It usually tests around 14-15% THC, which honestly is perfect. Bro, not everything needs to melt your face off and give you a panic attack. It gives you this super chill, euphoric high that actually lets you function. You can smoke a joint of this and still manage to go to the grocery store without feeling like everyone is staring at you. Highly recommend keeping this one in the stash for daytime sessions.

🌿 Start a Royal Critical Automatic journal — free →

Similar strains

Easy BudRoyal Queen · ±60 daysPurple Queen AutomaticRoyal Queen · ±60 daysJack Herer AutomaticRoyal Queen · ±67 daysAmnesia Haze AutomaticRoyal Queen · ±77 daysRoyal AutomaticRoyal Queen · ±60 daysRoyal Kush AutomaticRoyal Queen · ±60 daysAuto AmnesiaLinda Seeds · ±63 daysAuto Black OpiumDivine Seeds · ±63 daysAuto Blue DreamDutch-Headshop · ±63 daysAuto Blue MangoBSB · ±63 daysAuto ChemdogAuto Seeds · ±63 daysAuto Critical BangSputnik Seeds · ±63 daysAll Royal Queen →
BreederRoyal Queen
Typeruderalis/indica/sativa
Flowering time±63 days
EnvironmentOutdoors
LineageCritical × Ruderalis
DescendantsWhite Widow Automatic, Bubble Kush Automatic, White Widow Automatic, Blue Cheese Automatic, Royal Cheese Automatic

🌱 Get Royal Critical Automatic seeds →
Affiliate link — supports Cultivar at no cost to you.

Autoflower note: runs on age, not light schedule — see the week-by-week autoflower schedule.

🧬 Explore the family: Critical · Ruderalis · White Widow Automatic · Bubble Kush Automatic · White Widow Automatic · Blue Cheese Automatic · Royal Cheese Automatic

Ancestry Pedigree

Critical
Royal Queen Seeds
Critical Plus
Dinafem
Critical Bilbo
Clone Only Strains
Critical Mass
Mr Nice Seedbank
Afghanistan Indica
Original Strains
Skunk Nr1
The Seed Bank
Skunk Nr1
Cultivators Choice
Afghanistan Indica
Original Strains
Mexico Sativa
Original Strains
Colombia Sativa
Original Strains
Ruderalis
Original Strains

Growing Royal Critical Automatic: what to expect

Because Royal Critical Automatic is an autoflower it runs on age, not photoperiod: keep it under 18–20 hours of light from sprout to harvest, start in its final pot, and go easy on training after week 3 — autos never pause to recover. Growers familiar with Critical or Ruderalis will recognize much of its behavior. Whatever the listing says, the cut in YOUR tent is the ground truth: log feedings, readings, and photos, and let the trends — not the label — drive decisions.

Royal Critical Automatic FAQ

How long does Royal Critical Automatic take to flower?

Royal Critical Automatic typically flowers in around 63 days from sprout (autoflower — no light-schedule flip needed). Individual phenotypes vary, so judge harvest readiness by trichome color, not the calendar.

Is Royal Critical Automatic an indica or a sativa?

Royal Critical Automatic is listed as ruderalis/indica/sativa (autoflowering).

What are the parents of Royal Critical Automatic?

Royal Critical Automatic was bred from Critical × Ruderalis by Royal Queen.

What environment does Royal Critical Automatic like?

Standard cannabis bands work well: VPD 0.8–1.1 kPa in veg and 1.0–1.4 kPa in flower, with humidity stepping down from 65–75% as a seedling to 40–50% in late flower. See the stage-by-stage table on this page.

📷 Growing Royal Critical Automatic and something looks off? Free AI photo diagnosis →

Facts compiled from public breeder listings. Growing Royal Critical Automatic? A structured journal — with your feedings, readings, and photos — is how you find what THIS cut actually wants.

Suggest an edit for Royal Critical Automatic

Track your own grow free — the journal grades your environment against these bands →

Get the one-page grow reference card

VPD, pH by medium, deficiency symptoms and dry/cure targets on a single printable page. Free — plus the occasional grow-data breakdown. No spam, unsubscribe in one click.

Or just open the card now — no email needed →

Published by Cultivar (logmygrow.com), a structured grow journal. These reference bands are the same ones the app grades real grows against. Free to cite with a link. Some outbound product links are affiliate links — see disclosures.