Plants are too tall, need help!

Hi everyone, i have a problem . I started growing year ago , first two grows were feminized seeds , i planted 2 seeds in 3x3 tent , but one plant grew too big and second plant didnt have buds and i removed it before harvest. On my third grow i bought autoflower, and was expecting small plants that will fit in to 3x3 tent , but i'm getting same results , one plant is tall , and have buds just on a top , not much , the plant itself looks like a tree , very tall , a dont have a space to move light anymore in 6' tent. What am i doing wrong?
I'm using GH Flora trio , schedule is on attached picture. I'm also using venturi with 1000gph water pump for 10 gallons that in a system , so i'm thinking what if roots are getting too much oxygen?
My last grow i turned on bloom light after a month , but kept grow light too , after 50 days i turned grow light off and kept only bloom. Now they are 2 months old , i see that not much buds on it
Attaching pics , but i'm not sure you can easily see what's happening. Help me please

pictures i made looks so so , i will take another one if needed

this a schedule i'm using

Hello, yes please take more pics with that light off. What light are you using? The plants looks stretched out like they wanted more light.

MY EYES! THE GOGGLES, THEY DO NOTHING!

it is definitely stretched out , i'm using Mars hydro Mars ll 900

• Actual Power: 340W+/-5%@100--277V
• Coverage: Veg: 4’x4’(120x120cm); Bloom: 3.5’x3.5’(105x105cm)
• Compared to HPS/MH/HID: 430W

disregard plant in soil in the corner, its just an experiment. Plants in a dwc are about 5' tall including buckets

I think your biggest issue is your light.....

j0int said:

it is definitely stretched out , i'm using Mars hydro Mars ll 900

• Actual Power: 340W+/-5%@100--277V
• Coverage: Veg: 4’x4’(120x120cm); Bloom: 3.5’x3.5’(105x105cm)
• Compared to HPS/MH/HID: 430W

Click to expand...

Does that light have like a veg and a bloom switch? Are you only running one switch?

JoeBlow5823 said:

Does that light have like a veg and a bloom switch? Are you only running one switch?

Click to expand...

yes , veg and bloom switches , i kept only veg for first month, than switched both veg and bloom until 1 month and 20 days, and now in 2 months only bloom is on. When i purchased everything when bulding a system, i thought that Mars Hydro make good enough lights... What would you recommend?

it says coverage in veg 4x4 and bloom 3.5x3.5 , i only have 3x3 tent

j0int said:

yes , veg and bloom switches , i kept only veg for first month, than switched both veg and bloom until 1 month and 20 days, and now in 2 months only bloom is on. When i purchased everything when bulding a system, i thought that Mars Hydro make good enough lights... What would you recommend?

Click to expand...

You should be running both switches on whole grow. I would put mars lights right near the bottom as far as quality goes.

i kept both switches on on my first 2 grows, same reaults, very tall plants with buds just on a top. what light would you recommend?

j0int said:

yes , veg and bloom switches , i kept only veg for first month, than switched both veg and bloom until 1 month and 20 days, and now in 2 months only bloom is on. When i purchased everything when bulding a system, i thought that Mars Hydro make good enough lights... What would you recommend?

Click to expand...

Yes, run both switches on. If is pulls 340 watts than veg is likely less than half. If you went by 30 watts per square foot you would want a min of 270 watts and you are not giving them close to that with half the light off. For higher end stuff people seem to like HLG and Timber. Than for budget some say go to Kingbrite. I am using an HPS/MH system personally but heat can be an issue.

j0int said:

disregard plant in soil in the corner, its just an experiment. Plants in a dwc are about 5' tall including buckets

Click to expand...

I can only recommend next time when growing auto's to not use DWC if you don't want the plant to be big (For the most part) Some strains will still get tall.. but DWC grows tend to grow at a faster rate. Always check up on your strains to see if they naturally grow tall.

j0int said:

it says coverage in veg 4x4 and bloom 3.5x3.5 , i only have 3x3 tent

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I wouldn't want to flower more than a 2.5x2.5ft with that light on full power.
They just make these figures up.

Try searching for Samsung 301b , lots of options these days.
Or pick up a 315cmh.

Take the net down, pull out the plants, strip everything bottom 3rd off, cut off any piss weak branches then bend what you have 90degrees to create a flat canopy. Then add your net back on top and add a new light and hope for the best.

coreywebster said:

I wouldn't want to flower more than a 2.5x2.5ft with that light on full power.
They just make these figures up.

Try searching for Samsung 301b , lots of options these days.
Or pick up a 315cmh.

Take the net down, pull out the plants, strip everything bottom 3rd off, cut off any piss weak branches then bend what you have 90degrees to create a flat canopy. Then add your net back on top and add a new light and hope for the best.

Click to expand...

i removed second plant and kept the biggest one , cut off some branches from 1/3 , and bend the top branches , will continue to bend them to keep 14" distance between light. Will look for Samsung 301b. Thanks a lot man, i appreciate

Doug Dawson said:

Yes, run both switches on. If is pulls 340 watts than veg is likely less than half. If you went by 30 watts per square foot you would want a min of 270 watts and you are not giving them close to that with half the light off. For higher end stuff people seem to like HLG and Timber. Than for budget some say go to Kingbrite. I am using an HPS/MH system personally but heat can be an issue.

Click to expand...

Thank you! Looking at hlg light rightnow

JoeBlow5823 , HydroKid239 , thanks guys , your opinion is important to me

Doug Dawson said:

Yes, run both switches on. If is pulls 340 watts than veg is likely less than half. If you went by 30 watts per square foot you would want a min of 270 watts and you are not giving them close to that with half the light off. For higher end stuff people seem to like HLG and Timber. Than for budget some say go to Kingbrite. I am using an HPS/MH system personally but heat can be an issue.

Click to expand...

can you recommend a right light for me , here is a link of what they have https://horticulturelightinggroup.com/collections/lamps