Any advice? See my plant

Any ideas what might be wrong with this auto? It's at day 43 under a 600 watt super HPS.

i have a problem here my plants are over 6 foot tall my light is at its highest point buds are starting to burn up top what should i do

StifflerBen61 said:

Any ideas what might be wrong with this auto? It's at day 43 under a 600 watt super HPS.

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Need more information. What's the setup? Feed schedule? Temps? Has there been any sudden changes in temps? Like is it really cold during lights off or anything?

Also better pictures would help.

TopDogTHC said:

Need more information. What's the setup? Feed schedule? Temps? Has there been any sudden changes in temps? Like is it really cold during lights off or anything?

Also better pictures would help.

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4x3x5 ft tent, 600 wat HPS, currently running big bloom, tiger bloom, and foliage pro. I just upgraded from a smaller tent and some of my plants got light burned. Will they recover? I will post pictures tonight! Thanks bro

Here's another pic

imnotafed said:

i have a problem here my plants are over 6 foot tall my light is at its highest point buds are starting to burn up top what should i do

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Uh . . . raise the light or tie the top over a bit? Do you know about topping plants?

StifflerBen61 said:

Here's another pic

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Light as far up as it can be raised, keep air moving but don't beat the crap out of the plant. Have you been giving nutes?If so how much and of what?

They just look really droopy, could be a number of things. How often are you feeding? Are there burned tips or discoloured leaves?

What's drainage like?

combined with the description it looks like light stress to me, do they perk up after the lights first come on or do you run 24/0?

hotrodharley said:

Light as far up as it can be raised, keep air moving but don't beat the crap out of the plant. Have you been giving nutes?If so how much and of what?

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Been doing big bloom at full dose, tiger bloom at half dose and foliage pro at half dose. The past two waterings were only water as I wanted to see if it was a nute problem. The larger lower fan leaves on all the plants are turning yellow, I pulled those off (2-3 leaves per plant). Here are some other pics from now along with my ventilation setup.

billytimmy said:

combined with the description it looks like light stress to me, do they perk up after the lights first come on or do you run 24/0?

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18/6 now.

TopDogTHC said:

They just look really droopy, could be a number of things. How often are you feeding? Are there burned tips or discoloured leaves?

What's drainage like?

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Some burned tips, some light green lower fan leaves, etc. I pulled off the lower big yellow leaves.

What is your grow room temp?

Marijuana Mercenary said:

What is your grow room temp?

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77-81 when light is on

Do you have a fan going?

It looks like it only affects top growth of the plant. I am thinking it is heat related. Is your room dry?

Is there any way we can get a pic with a cfl or natural light?

StifflerBen61 said:

Some burned tips, some light green lower fan leaves, etc. I pulled off the lower big yellow leaves.

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They need a feed including Magnesium.

hotrodharley said:

They need a feed including Magnesium.

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Here are some close ups of problem areas under room light.

Also is a pic of my biggest plant currently at day 44. Nirvana short rider

Looks like nutrient burn and heat stress.

The bleached leaves at the top of the plant is down to the hood beeing to close to the canopy

where is the thermometer located ? looks like heat stress .... but at the same time a very aggressive feed is being used .... personally i would have them on 1/4-1/2 strength grow.... about 1/4 bloom .... micro... and cal/mag but thats just me ..... FYI if the plant is still getting taller its still in veg basically

StifflerBen61 said:

77-81 when light is on

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