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autoflower seedlings

Many growers elect to cultivate autoflowers because of their speedy growing rate. Their hardy genetics and forgiving nature also make them easier to grow and therefore more beginner-friendly.

8 weeks, with subsequent weekly harvests when growing fast strains.

LIGHT SCHEDULE FOR AUTOFLOWERING STRAINS

Their impressive resistance to pathogens and pests allows them to withstand the challenges of outdoor growing.

Germination usually takes 1–3 days. During this time, your seeds will activate and send a root down into the soil and a shoot above the surface. To begin the germination process, you’ll need to prepare a suitable soil mix. Autoflowers don’t need as much nutrients as photoperiod varieties and prefer light and airy soil.

You can make your own potting mix using the following formula:

So, You Want to Grow an Auto-Flowering Plant!

This was the final height of a “Lowryder” auto plant grown in a very sunny window. Lowryders tend to stay the smallest of almost all auto-flowering strains. This plant ended up having very small yields because it was grown in a window. It’s difficult to find a window that gets 5+ hours of direct sunlight each day, and generally it’s recommended that most growers avoid growing in a window if they want to get decent yields.

There are many other great breeders that offer auto-flowering seeds, but the breeders listed are known for breeding some of the best auto seeds when it comes to ease of growth, potency and yields. Let us know if there’s an auto-flowering cannabis breeder we should add to this list!

Here’s a great LST example by Santacabrera showing how to gently bend the middle colas of an auto-flowering plant down and away from the center without cutting or harming the plant.

Grown in a Space Bucket using FFOF (Fox Farms Ocean Forest) soil, Big Bloom Nutes, 1 gallon bucket, 135watt cfls, inside a Spacebucket.

Auto-Flowering

If growing in soil avoid choosing a “hot” (lots of nutrients) soil mix. BioBizz Lightmix soil or Fox Farms Happy Frog are good choices that don’t have too many nutrients to start. With any soil mix, it’s recommended to add about 30% extra perlite for increased drainage.

Week 5 begins with the plants producing lush leaves with a few buds appearing slowly. Continue with the “Grow” nutrients even at this stage lest you want the plants to stop growing vertically. This is the stage where an explosion of growth occurs and you need to support it with nitrogen. Using more phosphorous or potassium at this point will force the plant to focus more on the buds rather than growing.

As you enter week 6, the appearance of buds is even more apparent. A little defoliation doesn’t hurt now. Defoliation is the process of removing extra leaves to provide more light to the lower parts of the plant. Don’t overdo it, though, because the plant relies on the leaves to receive nutrients. Continue with nutrients meant for the vegetative stage as the plant will shoot up vertically.

Remember to regulate the pH constantly when using nutrients, but if you’re using something like the pH Perfect from Advanced nutrients, for instance, pH can take a back seat.

Week 4 to Week 6

By week 11, all the leaves start turning yellow. Most of the pistils turn amber, indicating that it’s almost time to harvest. Admittedly, many seed companies including Fast Buds tell you that the plant will finish its cycle in 8-9 weeks. And yes, they do finish in 9 weeks if you use bloom nutrients right from week 4.

The plant is all geared up for its flowering stage and bloom nutrients can be used at full strength. The buds will begin to swell and the unmistakable aroma of sweet cannabis will fill up your tent. The pistils will slowly change colors from white to a light brown or red, depending on the strain.

Ideally, the seeds should be soaked in a glass of water for at least 24 hours. Some growers use a nail file to scratch the seeds gently before soaking them. This ensures that the seeds soak in more water, but you shouldn’t attempt this if you’re a beginner.

As you enter week 8, the leaves start yellowing a bit, but there’s nothing to be alarmed. This is just a natural way of the plant indicating that it’s nearing the end of its cycle. Continue to use flowering nutrients even as you step into week 9. Don’t forget micronutrients that are added right from week 2. Defoliate the plants again if the bottom parts of the plants display small buds.