amnesia haze flowering time

Amnesia Haze Auto Cannabis Strain Week-by-Week Guide

1. History

Just like all other classics, Amnesia’s Haze exact origins are unknown up to this day, but it is said this gem has been created by an American cannabis breeder.

David Paul Watson, an American grower, and breeder used to collect cannabis strains back in the ’90s, having a wide selection of strains, David decided to cross Thai, Jamaican, Hawaiian, and Afghani landraces, which were the strongest he had.

The result was a Sativa-dominant powerful with a really intense effect but because Cannabis was illegal, he didn’t get much credit for it at the time.

Even though he didn’t get much credit, the still unknown Amnesia Haze was known by avid consumers for its potent effect, once a European grower got his hands on the genetics, he took them to Amsterdam where he developed the strain even further and started to get popular.

The story says that once this still unknown strain started to be sought after, Zwiep who was the owner of a big fertilizer company in The Netherlands was able to get seeds and crossed them with Nevil’s Haze, creating what we know today as Amnesia Haze.

Because he knew how unique Amnesia Haze was, he only had clones available until he teamed up with a very popular seed bank from Spain to make regular and feminized seeds available to the public.

As the genetics spread throughout the world, he started winning awards including 1st place in the 2004 and 2012 Cannabis Cups, and quickly came one of the most known strains all over the world, becoming present in almost all seedbanks and dispensaries worldwide.

2. Specifications

Fast Buds did a great job with the auto version of this old-school classic. You can expect 650gr/m 2 of thick hard nugs completely capped in resin in 10 weeks from seed to harvest.

Our version of this gem can grow up to 150cm, making her tall for an autoflower, she will develop large spaces between the internodes with a bushy foliage but still having the typical Sativa structure.

With up to 22% THC, the buds end up denser than you would normally see with Haze varieties with rock-hard calyxes completely buried in trichomes with a truly special blend of orange citrus terpenes with floral undertones on the inhale that turns deeper on the exhale, tasting identical to the renowned Amnesia Haze.

3. Week-by-week guide

This grow cycle started very well but suffered from some complications such as lower temperatures and high humidity, which resulted in bugs appearing in some plants, even though they were taken care of relatively quickly, the height was affected and ended up shorter than usual.

Grow Specifications
Light Fixture: LED
Light Cycle: 18/6
Humidity: 80% – 40%
Temperature: 20-26 °C
Grow Space: Outdoor/Indoor
Nutrients: Organic
PH level: 5.7-6.2
Seed to Harvest: 10 weeks

In this table, you can find information on how the plants in this cycle were cultivated. This grow guide serves as a written timeline on how to properly take care of your plants and what to avoid in some cases.

4. Week 1 – Germination

This grow journal started by germinating one Amnesia Haze Aut o seed directly in paper towels, although we strongly recommend soaking them in water for around 12hs before transferring them to the paper towels.

Germinating your seeds like this won’t bring problems per se but by allowing them to hydrate for a bit before placing them in paper towels the shell can soften a bit, increasing the chance of germination.

Height : 1cm
pH : 6.4
Humidity : 80%
Temperature : 20-25 °C
Watering : 100ml

In this case, after the taproot (aka radicle) appeared and reached around 2cm it was planted directly into a mix of super soil, perlite, and coco fiber, by doing this, you don’t need to add nutrients unless you see signs of deficiencies , remember that seedlings don’t need nutrients but because this super soil had a slow-release powdered amendment, it won’t start providing nutrients for 10 days.

After your seedling comes out from the medium you’ll be able to see two small rounded leaves which are named Cotyledons, they are what provide food for your seedling until the nutrients are widely available so it’s vital you make sure they’re not showing signs of deficiencies.

The environment also can affect your seedling so you need to keep a temperature of around 23 °C, a high relative humidity of around 60-70%, and water with very little water, approximately 100ml.

If your seedling hasn’t shown a pair of leaves on top of the cotyledons after 1-2 days, there’s definitely something wrong and you should check everything is ok, obviously this can depend from strain to strain but usually, the first pair of one-fingered leaves develop right after your seed has come out of the medium.

5. Week 2 – Vegetative stage

After successfully germinating your seeds, you’ll see the first true leaves appearing and are officially in the vegetative stage.

This strain takes approximately 10 weeks, so you can expect your plant to take around 4-5 weeks from start to finish of the vegetative stage, we don’t recommend transplanting our autos but if you started in a smaller container you should transplant it to the final pot when your plant has around 2-3 pairs of true leaves, which are the first leaves with several “fingers”.

Height : 5cm
pH : 7
Humidity : 65%
Temperature : 20-25 °C
Watering : 100ml

Remember that after transplanting it, your plants will need a couple of days to adapt so you may see the growth slowing down a bit but if you did everything correctly, your plant will come back to normal in a couple of days.

Depending on the medium, you will have to start feeding with a small dose of nutrients, preferably organic to prevent nutrient lockout and burn, the roots also need oxygen to thrive so make sure the soil is not compact to allow proper air exchange and the water to be absorbed.

As you see in the photos, the super soil was mixed with perlite and coco fiber, perlite allows more oxygen in the medium while coco fiber makes it fluffier and hols water better so if you need to improve your soil these two are great ways to make it better.

The first week has passed for my little Auto Amnesia Haze and she is growing vigorously. she is healthy and popping out new leaves. I keep misting her soil with plain water, no nutes yet.” – BipolarHellas

Remember that cannabis plants depend on the environment to grow properly so make sure you maintain a relative humidity of 60% and a temperature between 18-25 °C and remember to slowly decrease the humidity, you should reach around 50% when your plants reach the pre-flowering stage.

6. Week 3 – Vegetative stage

If you germinated your seed in the final container, the roots should have established by now but if you transplanted it may take a little longer, either way, in the third week from germination your plant should have at least 3-4 pairs of leaves and is now ready to start LST if you wish to.

Height : 10cm
pH : 6.3
Humidity : 55%
Temperature : 22 °C
Watering : 250ml

Sometimes it can be hard to start plant training (such as SoG or SCRoG) at this stage because depending on the strain, the internodes can be short but with this one grows with a long internodal spacing thanks to it’s Sativa heritage so you shouldn’t have a problem at all.

At day 19 LST was performed on the main stem. everyday top and leaves were pulled to sides. there are no notable deficiencies or any kind of symptoms.” – Satori_Hanso

If you are planning on training your plants, make sure you do it gently, even though they already are in the third week they’re still fragile so it’s extremely important you do it with care and take your time.

You’ll notice your plants are growing really fast, you will clearly see a big difference from one day to another so you need to start feeding your veg nutrients in an approximate ratio of 3-1-2 if you’re not growing in an amended medium.

7. Week 4 – Pre-flowering stage

Starting week 4 you will see the bud sites starting to turn light green, this means your plant is almost ready to start showing stigmas and entering the flowering stage, it will only take a couple of days more.

After 2-4 days have passed, your auto will start to develop white hairs named stigmas, when this happens it means that she is sexually mature and is ready to start the long-awaited process of flowering.

Height : 15cm
pH : 6.2
Humidity : 50%
Temperature : 20 °C
Watering : 600ml

If you’re not growing in super soil, you should make a gradual transition from vegetative to flowering nutrients, blooming nutrients should be used in a ratio of 1-2-3 so when transitioning, you should slowly decrease the amount of nitrogen and increase the amount of phosphorus and potassium, which are the macronutrients a cannabis plant needs to produce buds.

Also, if you are using a sterile medium such as coco fiber it’s essential you provide the micronutrients needed for optimal growth such as calcium and magnesium among others.

The pre-flowering stage is when your plant will start producing trichomes so if you’re growing indoors, it’s essential you have a way to mask the smell, even though it may not be too strong now, it will become more pungent as the flowers develop.

As said before, the environment is super important when growing cannabis so make sure you check and adjust it every day if necessary, you should slowly start decreasing the relative humidity from 60-50% in the vegetative stage to around 40-45% in the end of flowering.

8. Week 5 – Flowering stage

In the fifth week from seed, your Amnesia Haze Auto is officially in the flowering stage so make sure you’re already feeding only blooming nutrients because your plants need the mineral to fatten up the buds , you should also check the environment closely, failing to check and adjust the temperature and especially the humidity can result in bugs or mold so make sure you maintain it at an appropriate level.

Height : 20cm
pH : 6.5
Humidity : 55%
Temperature : 23-25 °C
Watering : 700ml

In this grow report the humidity levels oscillated a bit during day and night so the growers reported the appearance of bugs which were promptly eliminated so it didn’t have a serious impact at all other than having to remove a couple of dead bugs from the plant.

When your plants start flowering, you will see what growers call the “flowering stretch” where plants can double their size, depending on the genetics.

Our Amnesia Haze Auto can grow up to 150cm but because the height was controlled and suffered from bugs, you won’t be able to see a big stretch although it definitely grew a lot taller than what it was before.

I was at the lake last week and left these plants to do their thing. Our weather has finally changed last week and it’s sunny and hot days and warm nights. They’re loving it. I removed a large fan blocking bud sites and found an aphid, so tonight I’ll spray with end-all and again in a week. If anybody has any repellents for those bastards I’d love to hear. Either way, they’re cruising along with little issues...” – SAC87

Also, leaving the ties until harvest can really stress your plants so it’s essential you remove them now, even though you will see your plant still growing a bit, it will keep the structure you gave it when training.

9. Week 6 – Flowering stage

In the sixth week from germination, you’ll gradually start to see the stigmas getting longer and longer, with an increased production of trichomes, and with trichomes come the terpenes, so if you haven’t had a problem with the smell you will probably have by now so it’s a good time to install a carbon filter.

Height : 35cm
pH : 6.1
Humidity : 50%
Temperature : 22-28 °C
Watering : 1000ml

Also, by now you should already be feeding a full dose of blooming nutrients, always make sure to check for signs of deficiencies. Signs like yellowing or droopy leaves indicate an excess of nutrients or water but always make sure your plants are properly fed.

By this stage, you’ll notice your plants are drinking a lot of water, this is an indication that they’re in full flowering mode and are growing without a problem, just make sure you’re feeding what your plant needs and not a drop more, watering in excess can lead to overwatering which can bring problems, also, watering too much can increase the humidity in your growing tent which can ultimately attract mold or bugs.

10. Week 7 – Flowering stage

When growing our Amnesia Haze Auto, you’ll see it takes a couple of days more than Indica -dominant strains, this is because Amnesia Haze is a Sativa -dominant hybrid but don’t worry, if you don’t see signs of deficiencies you’re not doing anything wrong, Sativa species take longer to mature, that’s why they usually grow taller and yield more.

Height : 45cm
pH : 6.5
Humidity : 45%
Temperature : 25 °C
Watering : 1200ml

Although it takes up to a week more than some of our varieties, those extra 7 days make it possible to harvest up to 650gr/m 2 so be patient.

If you’re doing everything correctly, week 7 will pass really fast, there’s nothing else to do other than feeding your plants and maintaining a good environment for them to thrive, remember to check the temperature and humidity every day and adjust if necessary.

Thanks to the unique terpene profile consumers will experience a cerebral rollercoaster that will leave you highly motivated and focused and slowly transform into a more relaxed and lethargic effect, perfect for chilling with friends, writing, or playing music.

15. In conclusion

Amnesia Haze Auto is a must for those looking for a Sativa-dominant classic, you can expect a really pleasant cerebral high and an insane trichome production in 10 weeks. If you’re planning on growing it or have grown it before, feel free to share you’re experience or doubts in the comment section below.

External References:

  1. New insights on flowering of Cannabis sativa. Acta Horticulturae – Duchin, S. & Nirit, Bernstein & Kamenetsky, Rina & Spitzer-Rimon, B. (2020).
  2. Understanding Cannabis. The Journal for Nurse Practitioners – Hunt, Debra & Keefe, Joanne & Whitehead, Tammy & Littlefield, Amber. (2020).

Here's a week-by-week guide to help you grow our auto version of the world-renowned Amnesia Haze Auto!

Amnesia Haze

Amnesia Haze is a sativa dominant feminized strain with 22% THC. This is the American version of the original Dutch hybrid.

The plant grows up to 120 cm when grown indoors and up to 2.1 m outdoors. After 10-11 weeks, you will get a yield of up to 600-650 g / m2. If it growing outdoors, give the plant the extra care it needs. Beware of problems with insects, weather, and watering. The variety is best suited for hot and sunny climates, you also can use SOG and SCROG.

There is a strong effect of relaxation, even psychedelic. Even experienced smokers can often turn their brains off. The taste is pleasant, fresh and fruity.

Cannabis grow journals, strain reviews by home growers, harvests and trip reports. Amnesia Haze by Royal Queen Seeds strain information. ]]>