Why Your Autoflower Cannabis is Not Flowering

Hello, budding cannabis cultivators!  Have you ever stared at your autoflower cannabis, week after week, only to see it stubbornly refuse to flower? Well, you’re not alone. Even the most seasoned growers have had a standoff with an autoflower plant that wouldn’t bloom. It’s like waiting for a watched pot to boil, but worse -…

Why Your Autoflower Cannabis is Not Flowering

Understanding Autoflowering Cannabis

Autoflowers are the rebellious teenagers of the cannabis family.

They don’t care about your light schedules or carefully calibrated grow room.

Why? Because they’ve got Ruderalis genetics in their DNA.

Ruderalis is a type of cannabis that flowers based on age, not light cycles.

These plants got so tired of the long, dark winters in their original northern habitats that they said, “Forget it, we’re blooming when we feel like it!”

And so, autoflowering cannabis was born.

The Unique Nature of Autoflowers

The Unique Nature of Autoflowers

Autoflowers don’t need you to switch the light schedule to 12/12 to start flowering; they do it on their own, usually around five weeks after germination.

But sometimes, like a cat that refuses to come inside, they won’t do what they’re supposed to do.

It’s not you; it’s them – or rather, their stubborn Ruderalis genetics.

Common Reasons Autoflowers Fail to Flower

If you’ve got an autoflower that’s more like a “neverflower,” there could be several culprits at play.

Incorrect Lighting

Even though autoflowers don’t need a change in light schedule to flower, they still need light.

Think of them as photosynthetic teenagers – they might act like they don’t need you, but they still need to eat.

Your plants might get confused if your light schedule is too short or long.

Stick to a solid 18/6 or 12/12 light schedule to keep your plants happy.

Stress and its Effects

Stress and its Effects

Autoflowers, like all plants, can get stressed.

Overwatering, under-watering, too hot, or too cold can stress your plants.

And stressed plants are like stressed people – they don’t perform at their best.

Too much stress can even stop autoflowers from flowering entirely.

Nutrient Deficiencies

Just like you can’t run a marathon on an empty stomach, autoflowers can’t flower without the proper nutrients.

If your plants lack essential nutrients, they might refuse to flower.

Monitor your plants for signs of nutrient deficiencies, and adjust your feeding schedule as necessary.

Temperature and Humidity Issues

Autoflowers may be challenging, but they’re not invincible.

Your plants might refuse to flower if your grow room feels more like a sauna or an icebox.

Keep your grow room at a comfy 70-85°F (20-30°C), with a relative humidity of 40-70%, and your plants will thank you.

How to Stimulate Flowering in Autoflowers

You can’t force autoflowers to flower – they’re not photoperiod plants.

But you can encourage them by providing the best possible conditions.

Ensure they have the right light, nutrients, temperature, and humidity.

When to Consider Replacing Your Autoflowers

When to Consider Replacing Your Autoflowers

At some point, you might have to accept that your autoflower isn’t going to flower.

If it’s been over 15 weeks and you’re still not seeing any buds, it might be time to let go.

You must consider your grow room space, time, resources, and expected yield.

If your autoflower is more like an auto-squatter, taking up valuable space without producing any buds, it might be time to replace it.

It’s not an easy decision, but sometimes it’s necessary.

Remember, every ending is a new beginning – or, in this case, a new opportunity to grow some fantastic cannabis.

That’s all, folks! Remember, growing cannabis is part science, art, and magic.

Don’t be discouraged if your autoflowers take their sweet time to bloom.

As the old saying goes, “The buds are always greener on the other side.” Or something like that. Stay green, friends!


How do I get my Autoflower to flower?

Provide optimal light, temperature, humidity, and nutrients. You can’t force it to flower, but you can create the best conditions for it.

Can Autoflowers take longer to flower?

Yes, some may take longer to flower than others.

How can I speed up my Autoflower flowering?

You can’t speed it up, but provide the right conditions for optimal growth.

Why are my plants not going into flower?

Causes include stress, nutrient deficiencies, incorrect lighting, or temperature/humidity issues.

Why does my plant have lots of leaves but no flowers?

That could be due to excessive nitrogen levels, which promote leaf growth over flower production.

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