PLANTS NOT GROWING UP!!!

Hi guys,

I am having a bit of trouble growing in my new tent, is the third time I grow in this tent that it is 13 sq feet, with a 360 Watts LED, the problem that I am having is that plants are not growing up or towards the light, they keep getting bushy but not tall. I am growing some feminized seed now (two weeks old, from sprout), but have had the same problem with automatic plants in my last two grows, I thought that I was overwatering but diminish the water amount didn't solve the issue in the past two grows, I kept the LED around 18 inches from the plants, for this grow I pull the LED lamp further up to hopefully make the plants stretch but this didn't solve the issue either, I don't know what I am doing wrong, never had this issue until using this small tent.

About my tent design and climate, I am using this 360 watts LED, two fans, the relative humidity of the tent fluctuate between 35% to 50%, the temperature is between 70 to 80 degrees, I am watering with purified water, I have one extractor in and one out, the soil I am using is All mix from Bio-Bizz, I am using a 24/24 light cycle because I have some auto plants an some fem plant that are in the vegetating stage.

I attached some photos of the plants, the bigger ones are the autos that are about to be ready an the small ones are the fem.

I hope you can help me out!! thanks

I usually only use 24 hours of light for my clones and seeds. Once my seeds break the soil and my clones have roots, I switch my lights to 18/6. And when you say 360 watts, is that actual wall draw watts?

Please take pictures without the blurple lighting. Normal lighting so we can actually read the plants.

Make sure to maintain a warm canopy with LED as it lacks infrared that HID puts out. 70 - 80 degrees is too cold and stunts growth. Get the canopy temps up around 84 - 86F and the plants will speed up.

The lighting is a little under powered for that square footage and the spectrum is lacking.

Grow bigger plants before you flower them. Seedlings stacking like that is good imo. Not stretching means they are content with the light intensity they are getting. Not a bad thing for most. But if you want them to be bigger when they are flowering, veg them longer. If you want longer internode space, try other genetics or raise your lights further from the plants.

kmog33 said:

Grow bigger plants before you flower them. Seedlings stacking like that is good imo. Not stretching means they are content with the light intensity they are getting. Not a bad thing for most. But if you want them to be bigger when they are flowering, veg them longer. If you want longer internode space, try other genetics or raise your lights further from the plants.

Click to expand...

I think they are autos. Not sure though.

Really though, too cool for LED and under lit.

Renfro said:

I think they are autos. Not sure though.

Click to expand...

Then just quantity of light....

Internodal Stretch happens mostly in dark period using energy they store during the day.
So running 24/7 and combining it with the spectrum your getting bonsai plants.

You could switch to 18/6 and raise your light.

Dontjudgeme said:

I usually only use 24 hours of light for my clones and seeds. Once my seeds break the soil and my clones have roots, I switch my lights to 18/6. And when you say 360 watts, is that actual wall draw watts?

Click to expand...

thanks, friend, I get it but I have the plants are located in a shed outdoors, now it is really cold here so if a turn off the lights the temperature will fall drastically to 50 degrees or lower. 360 watts of power, I don't know how much wall draw watts that are.

undwind said:

thanks, friend, I get it but I have the plants are located in a shed outdoors, now it is really cold here so if a turn off the lights the temperature will fall drastically to 50 degrees or lower. 360 watts of power, I don't know how much wall draw watts that are.

Click to expand...

In your original post you said 70-80f. Now you're telling us it drops to 50f lol.. that's a problem

What kind of pots are the big ones in ?
Looks like trash cans?

undwind said:

thanks, friend, I get it but I have the plants are located in a shed outdoors, now it is really cold here so if a turn off the lights the temperature will fall drastically to 50 degrees or lower. 360 watts of power, I don't know how much wall draw watts that are.

Click to expand...

Buy a heater with a thermostat!

This is also just an issue with blurple lights. For whatever reason the spectrum encourages short bushy plants. We see it all the time on here.

Like the others suggested, even a short dark period would help them stretch ... you can't turn the lights off for like 4 hours during the warmest part of the day?

Gentlemencorpse said:

This is also just an issue with blurple lights. For whatever reason the spectrum encourages short bushy plants. We see it all the time on here.

Like the others suggested, even a short dark period would help them stretch ... you can't turn the lights off for like 4 hours during the warmest part of the day?

Click to expand...

I will try to do that, hopefully a short period of cold won't affect the plants!.

KillaKane said:

What kind of pots are the big ones in ?
Looks like trash cans?

Click to expand...

they are PET pot, regular pots, they have a proper holes in the bottom.

P10p said:

In your original post you said 70-80f. Now you're telling us it drops to 50f lol.. that's a problem

Click to expand...

if I turn off the lights I will drop to that, if not the temperature will keep steady at 80 degrees.

coreywebster said:

Internodal Stretch happens mostly in dark period using energy they store during the day.
So running 24/7 and combining it with the spectrum your getting bonsai plants.

You could switch to 18/6 and raise your light.

Click to expand...

I will try to do this to see if it helps at least for a few hours.

Renfro said:

Make sure to maintain a warm canopy with LED as it lacks infrared that HID puts out. 70 - 80 degrees is too cold and stunts growth. Get the canopy temps up around 84 - 86F and the plants will speed up.

The lighting is a little under powered for that square footage and the spectrum is lacking.

Click to expand...

Thanks for that information. Had no clue. I'm also growing under 2 LEDs and have been a bit concerned with my temps of 82°F being too hot. Now I can breathe a bit easier.

Gentlemencorpse said:

This is also just an issue with blurple lights. For whatever reason the spectrum encourages short bushy plants. We see it all the time on here.

Click to expand...

I’ll go against the RIU mind, but I have an early Mars blurple I like for this reason. It sure seems to make real dense vegetative plants. I combine it with 3500k QBs.