Atlas F1 Week-by-Week Grow Report

I planted my Atlas F1 seed on 1st March 2025 and harvested a little over nine weeks later, which still feels fast for a plant that finished at 80 cm with buds hard enough to knock against a knuckle. She shared a Secret Jardin DS120W with two Gaia F1 plants on my little farm, so I had a direct comparison running alongside her from the first day.

Every watering volume, pH reading, feed change and height measurement below comes straight from my notes at the time. The useful detail in this Atlas F1 grow journal sits in the small adjustments rather than the big interventions, mostly because I made almost none of the latter. She was the tallest plant in the tent by the third week of vegetation and never gave me a reason to intervene after that.

Atlas F1 Week-by-Week Grow Report: Equipment List

The tent is a Secret Jardin DS120W at 120 x 60 x 178 cm, which gives me 0.72 m² of floor space and enough height that an 80 cm auto never came close to the lamp.

• Grow box: Secret Jardin DS120W (120 x 60 x 178 cm)
• Lights: MIGRO 200+, MIGRO Aray 4 (240 W)
• Ventilation: TT Silent-M 100
• Filter: Primaklima PK 100/125
• Fans: 2 x oscillating Koala fans
• Humidifier: Beurer LB 45
• Soil: BioBizz Light-Mix
• Pot: 11 L Air-Pot
• Seed: Royal Queen Seeds
• Nutrition: RQS Organic Nutrition

I ran the light on an 18/6 schedule for the entire cycle and kept it about 35 cm above the canopy from the seedling stage through to the last week. That distance never changed, which sounds lazy but works in my favour with a fast auto. The plant gets a consistent signal and I get one less variable to blame when something looks off.

The two oscillating fans matter more than they look on a list. One sits above the canopy and one lower down near the pots, which stops damp air settling around the base once the leaves stack up. Extraction through the Primaklima carbon filter kept the tent under slight negative pressure, and by the middle of flowering that filter was doing real work.

Atlas F1

Atlas F1

	One To One x Diesel Auto x Amnesia Haze
	XXL
	65 - 80 cm
	35 - 40 days
	Ratio 1:1

	Balanced, Calming, Physically Relaxing, Sleepy
	High
	65 - 70 days after germination

Buy Atlas F1

Atlas F1 Grow Report: Seedling Stage (Week 1)

Potting up came before the seed went anywhere near the soil. I filled the 11 L Air-Pot two thirds with BioBizz Light-Mix, added RQS Organic Boost pellets and seaweed, mixed those through, then topped the pot up to the rim. Mycorrhiza went into the top layer, I soaked the whole pot thoroughly, and only then did the seed go into a hole a few centimetres deep.

That was 1st March 2025. Atlas F1 broke the surface on 5th March, coming up alongside her Gaia F1 neighbours on the same day, which was my first small piece of evidence for the uniformity claim.

The only other intervention that week was a single watering on 8th March with plain water at pH 6.0. No nutrients at all. Light-Mix already carries a light charge, and the amendments mixed in at potting were more than enough for a seedling. Feeding at this point buys you nothing and risks a lot.

Atlas F1 Week-by-Week Grow Guide: Vegetative Stage (Weeks 2-4)

Three weeks of vegetation took Atlas F1 from a 4.5 cm seedling to 44 cm and the tallest plant in the tent. Conditions barely moved across that stretch: 26 to 27 °C during lights-on, humidity around 50% easing towards 45%, pH held at 6.0 to 6.1, and the lamp still 35 cm off the canopy. What did change was the batch volume I mixed for the farm, which I stepped up gradually rather than in jumps, and the feed, which stayed deliberately thin.

Week 2

Atlas F1 measured 4.5 cm on 12th March and 10 cm by 18th March. Slow on paper, though the root system is the real work at this stage.

Watering was minimal, just two sessions. On 14th March I mixed 3 L for all three plants on the farm, adding half a tablet of Easy Grow Booster and 3 ml of CalMg, then dropped the pH to 6.0. The second watering on 17th March was CalMg only at pH 6.1.

The tent sat at 26 to 27 °C with humidity around 50%. Higher would have suited a seedling better, but I chose not to run the humidifier and she showed no sign of minding.

Week 3

She doubled to 21 cm by 25th March, and the branching filled in so quickly that the main stem disappeared from view. Preflowers were already showing at the branch tips, which is normal for an auto on this timeline rather than anything to worry about.

Feeding went up a step. On 20th March I made 6 L for the three plants with a full tablet of Easy Grow Booster and 6 ml of CalMg, using Lemon Kick to bring the pH down to 6.0. Three days later she got the same volume with CalMg alone at pH 6.1.

Watering intervals settled at every three to four days. Humidity held near 50% and the temperature near 27 °C.

Week 4

44 cm on 1st April, up 23 cm in seven days, and comfortably the tallest plant on the farm. Her shape was already obvious: branches packed close together and running upwards alongside the main stem rather than spreading wide, which is exactly what you want in a tent only 60 cm deep.

The feed held its pattern. 7 L on 26th March with one Easy Grow Booster tablet and 6 ml of CalMg at pH 6.0, then 7 L of CalMg-only water on 29th March at pH 6.1. Watering moved to every three days.

Humidity slipped to roughly 45% and I left it there. Leaf colour stayed an even mid-green with no clawing or burnt edges, so nothing needed correcting.

Atlas F1 Grow Report: Flowering Stage (Weeks 5-9)

Flowering ran five weeks, from 2nd April to the final photographs on 6th May, which lands inside the 35 to 40 day window the seed page quotes. The switch on my side was simple. Easy Grow Booster came out of the mix and Easy Bloom Booster went in, humidity came down to around 40%, and watering settled at every three days. Everything else, light height, photoperiod and pH, stayed where it was.

Week 5

The stretch arrived on schedule. Atlas F1 went from 44 cm to 67 cm between 2nd and 8th April, and flower sites started stacking along every branch.

Before the first watering of the week I did a light defoliation, clearing the lower part of the plant where leaves were shading nothing useful and holding moisture near the pot. That was the only training or trimming of the entire grow.

On 2nd April I mixed 8 L with one Easy Bloom Booster tablet and 8 ml of CalMg. The waterings on 5th and 7th April were CalMg only. Temperature stayed near 27 °C and humidity around 40%.

Week 6

80 cm on 15th April, a gain of 13 cm, and the last real vertical movement she made. Bud sites that had been separate the week before started closing into a solid main cola, with the side branches following the same pattern in miniature.

The batch went to 9 L on 10th April with an Easy Bloom Booster tablet and 9 ml of CalMg at pH 6.0, then CalMg only on 13th April.

She finished the week at the very top of the 65 to 80 cm height range Royal Queen Seeds quotes for the variety, in an 11 L pot with no height control applied at any point.

Week 7

Height stopped dead at 80 cm and stayed there for the rest of the grow, which was a relief in a tent with a fixed lamp position. All the energy went into density instead.

Trichomes appeared across the flowers this week and the smell arrived with them. Opening the tent door was enough to fill the room, and the carbon filter earned its place from this point on.

Two feeds went in, 9 L each with an Easy Bloom Booster tablet at pH 6.0 on 16th and 19th April, followed by plain pH-adjusted water on 21st April. Each plant was taking close to 3 L per watering by now.

Week 8

Pistils began browning across the colas and the flowers thickened noticeably, though the trichomes were still mostly clear under a loupe. Pistil colour runs ahead of trichome maturity, so I kept waiting.

Nutrients came out this week. The 24th April watering was 9 L with 9 ml of CalMg at pH 6.0, and after that she got nothing but pH-adjusted water on 27th April. With an auto moving this fast there is no benefit in feeding into the final stretch.

The buds were already firm to the touch, and the smell had gone from sweet to properly pungent.

Week 9

Plain water at pH 6.0 and nothing else for the final week. 9 L on 30th April, the same again on 3rd May, and a last set of photographs on 6th May.

By then the flowers were sticky enough to leave residue on my fingers and hard under any pressure, which for an auto this size is the sign that the plant has run out of things to do. That was 56 days from the first day of vegetation, and counting back to planting on 1st March put the whole cycle just under 70 days.

I gave her another two to three days to drink the remaining moisture out of the pot before cutting.

Atlas F1 Grow Report: Harvest

One Atlas F1 plant produced 83 g of dry flower under 240 W in 0.72 m² of tent, sharing both the space and the light with two Gaia F1 plants. Run on her own under the same fixture, that number would sit higher.

The cycle closed just under 70 days from planting, matching the 65 to 70 day window on the seed page, with roughly five of those weeks in flower.

What stands out looking back is how little I did. One light defoliation in week five, no topping, no low-stress training, no netting, and no corrective action at any stage, because nothing needed correcting. No pests, no deficiencies, no mould and no lockout across the full eight-week run.

The buds dried hard and stayed sticky, with the candy and lime notes coming forward clearly once they had a few weeks in jars.

Atlas F1 Characteristics

The published figures for Atlas F1 lined up closely with what I recorded, which is rather the point of an F1 hybrid.

My plant finished at 80 cm, the very top of the quoted range, in an 11 L pot with nothing done to hold her back. Growers with less headroom than my 178 cm tent should plan for the upper end rather than the middle, or take a little more off the lower branches than I did.

Genetic Attributes of Atlas F1

Atlas F1 descends from three highly pure inbred lines: One To One, Diesel Auto and Amnesia Haze. One To One supplies the balanced cannabinoid ratio, Diesel Auto brings the autoflowering trait and the speed, and Amnesia Haze contributes the terpene weight and the upward, sativa-leaning structure I watched develop in the tent.

The F1 designation stands for Filial 1, the first generation of offspring from two distinct inbred parent lines. Reaching that standard takes generations of inbreeding to lock traits in place before the final cross, which is why F1 hybrid seeds express hybrid vigour instead of the phenotype lottery a standard polyhybrid hands you.

That showed up as predictability. My Atlas came up on the same day as the two Gaia plants beside her, grew at a rate I could anticipate a week ahead, and never threw a trait I had not expected. For anyone reading Atlas F1 grow diaries to plan a run, that consistency is the trait worth paying for.

Growing Characteristics of Atlas F1

Atlas F1 grows tall and narrow rather than bushy. Her branches stayed tight to the main stem and ran upwards, which suited a tent 60 cm deep and meant I never had to tie anything down or spread her out.

• Height: 65 to 80 cm indoors, mine finished at 80 cm untrained
• Flowering: 35 to 40 days
• Harvest: 65 to 70 days from germination
• Yield: rated XXL indoors
• Climate: suited to short summers outdoors

Three practical notes from this run. Set the lamp at a sensible fixed distance, because a plant that adds 23 cm in a week will find it if you have hung it too low. Scale watering in steps rather than jumps, which for me meant moving from 3 L to 9 L per batch across eight weeks. And take the lower growth off once in early flower, then leave her alone.

Disease resistance held up as advertised. Humidity in the 40% range through flowering helped, though dense colas at 80 cm are usually where botrytis starts, and I saw none.

Effects And Flavour of Atlas F1

Caryophyllene, myrcene and terpinolene lead the terpene profile, and the flavour reads as candy sweetness over a herbal base with a clear lime note on the exhale. The Amnesia Haze side is easiest to pick out in the aroma, which turned sharp and citrus-heavy during week seven and stayed that way through drying.

The cannabinoid balance is what makes her unusual. Equal concentrations of THC and CBD give an uplifting, level-headed effect rather than an overwhelming one, and users typically describe it as balanced, calming and physically relaxing, tipping towards sleepy at higher doses. The CBD content keeps the ceiling low enough that she suits daytime hours without writing off the afternoon.

Aroma and effect both shift with environment, harvest timing and how carefully you dry and cure, so treat any published profile as a starting point rather than a guarantee. Mine spent a fortnight in jars before the lime came forward properly.