Kritic Auto
Cannabis seeds
by Kannabia Seeds
Kritic Auto by Kannabia Seeds
Kritic Auto is an autoflowering feminised cannabis seed from Kannabia Seeds that delivers a fast, fuss-free grow cycle with genetics rooted in the legendary Critical lineage. If you want dense, resinous buds without fiddling with light schedules, this is where you start. Kannabia crossed their Critical mother with a ruderalis line to produce a compact, resilient plant that flowers on its own clock — typically ready for harvest in around 70 days from germination.
Why Kritic Auto Cannabis Seeds Stand Out
Kritic Auto cannabis seeds give you the heavy-hitting resin production of Critical genetics without the photoperiod dependency. That means no timer adjustments, no light-leak panic, no wasted weeks in veg wondering when to flip. The ruderalis backbone triggers flowering automatically around week 3-4, regardless of your light cycle. You still get the dense, trichome-coated bud structure that made Critical famous — just in a more compact, faster package.
We've carried Kannabia seeds since they were a small Barcelona operation. They've been breeding since 2000 and their autoflower programme is properly dialled in — not just a ruderalis cross slapped onto an existing strain. The Kritic Auto specifically was developed for growers who want reliability over experimentation. It's not going to surprise you with weird phenotypes or half the seeds refusing to pop. It does what it says.
The honest limitation? Yield. You're trading some weight for speed and simplicity. An autoflower in a 70-day cycle simply can't produce what a photoperiod Critical will in 4 months of veg plus 8-9 weeks of flower. If maximum yield per plant is your priority, look at Kannabia's photoperiod Critical+ instead. But if you want multiple harvests per season outdoors, or a quick turnaround indoors without dedicated veg and flower rooms, Kritic Auto earns its keep.
Kritic Auto Grow Specifications
| Spec | Value |
|---|---|
| Seed type | Feminised autoflowering |
| Breeder | Kannabia Seeds (Barcelona, est. 2000) |
| Genetics | Critical x Ruderalis |
| Lifecycle | ~70 days from germination to harvest |
| Height (indoor) | 60–100 cm |
| Height (outdoor) | 80–120 cm |
| Flowering type | Autoflowering (no light schedule change needed) |
| Structure | Compact, bushy, single dominant cola with lateral branching |
| Difficulty | Beginner-friendly |
| Pack size available | 100 feminised seeds |
How to Grow Kritic Auto Seeds
Autoflowers don't forgive transplant shock the way photoperiods do — every day of stress is a day of lost growth in a fixed lifecycle. Start right, and the plant does the rest.
- Germinate seeds using the paper towel method or directly in a small pot of light, airy substrate. Tap root should appear within 24-72 hours.
- Plant the germinated seed 1-1.5 cm deep in its final container — a 10-15 litre fabric pot works well. Autoflowers dislike being repotted, so skip the seedling tray stage.
- Provide 18-20 hours of light per day from seedling stage through harvest. Kritic Auto doesn't need a 12/12 flip, but it does want consistent, strong light. A 250-400W equivalent LED covers 4-6 plants in a 100x100 cm space.
- Keep humidity around 60-70% during the first 2-3 weeks, dropping to 40-50% once flowers form. Temperature sweet spot: 22-26°C during lights-on.
- Feed lightly — autoflowers are smaller and burn easily. Start nutrients at half the manufacturer's recommended dose and increase only if the plant asks for it (pale lower leaves, slow growth).
- Watch for the stretch around days 20-30. The plant will roughly double in height over 10 days as it transitions to flower. Support heavy colas with bamboo stakes or a SCROG net if needed.
- Flush with plain water for the final 7-10 days before harvest. Trichomes should be mostly cloudy with 10-20% amber when viewed under a jeweller's loupe (30-60x magnification).
Kritic Auto vs Photoperiod Critical: Which One?
| Factor | Kritic Auto | Photoperiod Critical+ |
|---|---|---|
| Total cycle time | ~70 days | ~120-140 days (veg + flower) |
| Light schedule | 18/6 or 20/4 throughout | 18/6 veg, 12/12 flower |
| Height | 60-120 cm | 100-200 cm |
| Yield per plant | Moderate (50-150g depending on conditions) | High (200-500g depending on veg time) |
| Difficulty | Beginner | Intermediate |
| Multiple outdoor harvests/year | Yes (2-3 in southern Europe) | No (1 per season) |
| Transplant tolerance | Low — plant in final pot | High — can up-pot multiple times |
Complete your setup: pair Kritic Auto with a fabric pot (11L or 15L for optimal root aeration), a quality LED grow light for consistent 18-20 hour coverage, and a carbon filter kit to keep things discreet during the fragrant final weeks of flower.
Who Should Grow Kritic Auto Seeds
Start with this if you're new to growing and want a forgiving first run. The autoflowering genetics mean fewer variables to manage — no light schedule changes, no sexing plants (they're feminised), no guessing when to flip. You plant it, feed it, and 70 days later you're trimming. It's also the right call for experienced growers running a perpetual harvest setup: stagger your planting every 2-3 weeks and you'll have a continuous supply without needing separate veg and flower spaces.
Outdoor growers in northern Europe (Netherlands, UK, Scandinavia) benefit particularly. The short lifecycle means you can start in May and harvest in July, then run a second batch through to September — dodging the autumn rains that rot photoperiod plants still weeks from finishing.
Frequently Asked Questions
How tall does Kritic Auto grow indoors?
Expect 60-100 cm indoors under standard LED lighting with an 18/6 schedule. LST can keep it under 70 cm if headroom is tight. Without training, the main cola stretches to about 80-90 cm in most setups.
Can I top Kritic Auto plants?
We'd advise against it. Autoflowers have a fixed vegetative period — topping costs 3-5 days of recovery that you can't get back. Use low-stress training instead: bend the main stem at day 14-18 to expose lower branches to light.
What light schedule works best for Kritic Auto?
18 hours on, 6 hours off from seed to harvest. Some growers run 20/4 for slightly more photosynthesis, but the difference is marginal. Never drop below 18 hours — you won't trigger faster flowering, you'll just reduce yield.
How much does Kritic Auto yield per plant?
Under good indoor conditions with proper lighting and feeding, expect 50-150g per plant dried. Outdoor plants in warm climates with full sun can push the upper end. It won't match a photoperiod Critical, but the 70-day turnaround compensates.
Does Kritic Auto need nutrients during flowering?
Yes, but go easy. Start bloom nutrients at half strength around day 25-30 when you see the first pistils. Autoflowers are smaller and more sensitive to overfeeding than photoperiods. Flush with plain water for the final 7-10 days before harvest.
Is Kritic Auto suitable for outdoor growing in the UK?
Absolutely — the 70-day lifecycle makes it one of the better choices for British summers. Plant after the last frost (late April/May) and harvest in July. You can fit two full runs into a single growing season if you start early enough.
What does Kritic Auto smell like during flowering?
Earthy and slightly sweet with a skunky Critical undertone. Not the loudest auto we've encountered, but still noticeable without a carbon filter. After drying, the aroma mellows to a smooth, slightly citrus finish.
Last updated: April 2026
Related products
You might also like
Medical disclaimer. This content is for informational purposes only and does not constitute medical advice. Consult a qualified healthcare provider before use of any substance.