Burn buds yellow leaves

Hello,
New in this forum. First grow, amnesia, fast bud and Barney’s plants.
had some issue I thinks with water dosage.
the plants are 7/8 weeks old, the top buds burn and leaves starting yellowing as per below picture.
the grow room is little bit small and touched the led light.
full led light 200w + hps 400w.
led All day , hps during the night 9 hours.
maybe humidity too high? I have around 60%.
I’ve stopped also with nutrients from some days. Usually used plagron alga bloom and green sensations.
thanks all


More pics
On bottom small new plants from rqs

I may be wrong, but I think your biggest problem might be having your lights way too close. Any idea or best guesstimation how much light is being subjected to those crispy fritters, with a light meter? (I use a smartphone app and get a ball-park number compared to other known ball-park light sources)

Check for info/specs on your specific lamp, ie: my own recommends 24-36” during flower. Pictures are deceiving in scale, but you appear to be having difficulty squeezing your camera between the lamp and your plant’s cauterized tops.

Apologies if I’m coming off harsh bro, my mama taught me to be blunt and over opinionated sometimes. I’m a greener nuub than you in many regards, I assure you. Your plants below that 2’ hot zone below the lamp looks absolutely delicious and I envy/hope/strive to achieve what you got going there. Cheers.

That is very strange how it was only the colas that withered and died.
I wonder if its botyris related, but i really do not know just very curious.

your light is way too close. Notice all the parts closest to the lamp are fried.

You need higher ceilings with that light. Dim it down to 50% and see what happens. You should buy a light according to space. You can't put a turbo for a truck in a small Fiat and expect good results.

60% is to high for flower, probably even higher when lights out. I think it's a combination of bud rot, high humidity and to much light.

thanks all for the replies!
what do you think of buds dimensions? since I want restart, can you give me your opinion if the buds looks ok with size of 7/8 weeks old plant?
do you add nutrients on each of your feed of just 2 times a week?
about defoliage, with autos, do you think is ok to do it often? i read that is a big stress but worried that the lower buds doesent take the light. usually when i do defoliage of bigger leaf, after 1 week i see many new ones.
for sure I will buy a higher grow box.
about the light, i use full day the led 200w and hps 400w just 5 hours per day. grow box dimension 80x80x170cm
the strange is also that lower buds got burned, not just the top ones. i stope used the nutrients for a while
cheers

I don’t know if a restart is the best option but it’s one.

Maybe more experienced thumbs could chime in on a suggestion. Or, what I’m wondering, what to expect from the plants if, per say, he topped/cut all the stuff too close to the lamp and continued flowering?

I agree with light too close and too much light for that space. The 400 watt hps alone would have handled those autos.

Most likely the led set alone would have handled them as well, if it was higher assuming 200 true watts, but I don't know anything about that light.

The flowers are the most delicate part at this point so got it the worst. See the leaf edges turning up but not like mg deficiency? That's light stress. See how far down it goes?
I have an auto that's really sensitive to light stress and one right next to it that's not (so sensitive).
Dial those lights in, autos don't handle intense lamps as well as most photos in my experience.

Just my opinions as usual.

stop using the hps and go only with the led and move it higher up and if you can’t, just cut off the burned tops (plus check for budrot)

You only need 650umol over 18 hours to pin a DLI of 40 for autos. The LED alone is more than enough to provide that. I've ran a 150w quantum board in a 2.6x2.6 and it managed more than that at 24" from the plants. I managed a DLI of 55 at 18" with a single 150w quantum board.

You are frying your plants with far too much light. Who told you to run 600w in an 80x80 to begin with?

thank all for the replies.
the led light is 200w true power. it's an lumatek ats.
I will defenitely stop using the hps and buying another taller grow box.
what about the dimensions of the buds. do you think is ok for 7/8 weeks plant?
bye

Just a quick update:
I’ve cut The burn tops and some plants seems recovered well.
I’m getting ready next week to harvest


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I don't think they are near ready yet.

Just saw your update, good news is always less attention grabbing than other news. Your plants have recovered remarkably, they look absolutely delicious! I can’t believe they’re the same plants, the flowering happening looks almost like an intended training now lol.

Sincere pat on the back (I know, that lost potential will nag your conscious for a while longer, but live and learn… and do like your plants are, apparently… fuck not given)

I’m curious and hope you didn’t harvest yet, but if it was time, it was time. I bet now a week later they look betterer.

last update for this topic:
After one week (march 12) I harvest them.
Overall harvest after drying was 185+ grams. What do you think?
the high is not bad at all
Cya