Autoflower Life Cycle Week By Week 

The reason why autoflowers are growing in popularity amongst home growers is the fact that they have shorter than usual life cycles. Because autoflowers contain ruderalis genetics, not only do they not require photoperiod light cycles but they’re typically ready to harvest in just 8-10 weeks. So, if you’re considering growing autoflowers or want a better breakdown on how to manage the autoflower timeline we’ve got the guide for you. Keep reading to learn autoflower life cycle week by week.

Autoflowering timeline 101 

Before we get into the timeline of how long do autoflowers take from start to finish, let’s brush up on the basics. Autoflowering varieties are specifically bred with ruderalis genetics. In the past, the cannabis ruderalis species grew wild in the world without specific periods of light like photoperiod strains. 

Now, to make autoflower cultivation even more simple than it already is – let’s break down autoflower life cycle week by week. 

  • Week 1:  Seedling Stage 

autoflower life cycle seedling of cannabis in planting pot

Just like most plants, the autoflower life cycle begins with the seedling. This is the tiny sprout that emerges from the seed once it’s germinated. As soon as the seedling appears, transfer it into the container you plan to grow the plant into full maturity. Since autoflowers are more sensitive than other cannabis species this avoids stressing your plant unnecessarily when transplanting later. In the first week, you should avoid feeding the seedling, too. As high levels of nutrients will be overwhelming for the plant and may result in burning.

  • Week 2:  Early Veg Stage 

Autoflower life cycle young growing marijuana in pinkish plastic container, lush bright fresh cannabis bush in early growth stage

As soon as your seedling sprouts a couple of leaves your autoflower is in the early veg stage. Which typically occurs in week 2. At this point, you should still hold off feeding a regular level of nutrients. Many growers recommend reducing nutrients to a ¼ of the amount. During early veg you should also ensure your environment is running optimally. This means keeping relative humidity around 60% and temperatures at 71-82°F (22-28°C).

  • Weeks 3-4: Late Veg Stage 

Autoflower life cycle A healthy cannabis plant in late vegetative stage of lifeIn weeks 3 and 4 you’ll watch your plants begin actively growing due to the roots being further developed. That means increasing nitrogen levels and making sure you’re giving crops enough phosphorus, potassium, and micronutrients at regular levels is optimal. Like regular plants double-check the height of your lights to make sure you avoid burning.. In the fourth week, you can begin implementing LST techniques to boost yields as well. 

  • Week 5: Pre-Flowering Stage

Autofolower lift cycle Pre-Flowering Marijuana bud close up

In week 5 you’ll start seeing autoflower flowering stage signs. Including the sign of pistils or flowering sites changing in color. If your plant isn’t showing signs of flowering by week 5 there’s no need to worry. Some genetics mature differently than others. As soon as pre-flowering begins you can switch to a standard flowering feed. If you’re growing with LED lights when your plants start to flower it’s ideal to switch the spectrum from blue to red. This promotes stretching of the plant for bigger results in the end and nurtures bud growth.

  • Weeks 6-8: Flowering Stage

Abstract, soft focus using macro lens. InteAutoflower life cycle cannabis plant

When the notorious white hairs start sprouting on your autoflower plant you’ll know you’re in the first part of flowering. This is when you should begin feeding with more phosphorus and potassium versus high levels of nitrogen in veg. Keep monitoring light heights and optimal environmental conditions. For the autoflower flowering stage relative humidity should be kept around 40-50% with temperatures at 68-79°F (20-26°C). These conditions are ideal for plant transpiration and photosynthesis to occur healthily. They’re also ideal for avoiding mold growth and you’ll want to continually monitor plants for pests, as well. 

Around week 7, is when the plant buds take shape and start to pack on the weight. Avoid implementing any additional LST methods during this time as you won’t want to stress the plant at such a crucial time. Towards the end of week 8, you can adjust environmental conditions to 30-40% relative humidity and temps of 64-75°F (18-24°C) to prepare for the drying and curing stage to come.

  • Weeks 9-10: End of Flowering Stage 

autoflower light cycle Macro photo of marijuana plant bud with crystals

Weeks 9 and 10 is when you’ll start to look for autoflower harvest signs. Doing so will ensure you don’t harvest too early, or too late which can detrimentally affect overall quality and potency. Autoflower harvest signs are the same as photoperiod signs. By watching the coloring and consistency of trichomes you can individually gauge when plants are ready to pull. The majority of white hairs will turn an orange amber color, and trichomes should be cloudy before turning amber for peak cannabinoid levels. Another autoflower harvest sign is yellowing leaves. 

During the final couple weeks, you can halt feeding and start flushing. By giving your plant water only you’ll ‘flush’ out the nutrients and any chemicals used throughout the process for improved flavor and taste. 

  • Weeks 10-11: Harvest time 

autoflower life cycle Macro closeup of trichomes

Once you have a good mix of cloudy and amber trichomes it’s time to harvest your autoflower plants. This is normally anytime between week 10 and 11 depending on the genetics you’re growing. You can also use the breeders’ strain description to give you a good idea of when to pull plants. After harvesting you’ll dry, trim and cure autoflower buds just like you would photoperiod. 

Autoflower Genetics for Fast Harvests 

Now that you can answer how long do autoflowers take from seed to harvest, you’re ready to tackle the autoflower timeline with success. What helps successful autoflowering crops is choosing top-shelf genetics to start. Like, the premium collection of autoflower varieties available at


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