Last 2-3 weeks flower VERY worrying problem

I have this occuring on my plants at the top part mainly
a kinda browning yellowing curling up of the leaves as you see below



end of week 5 it started, 2-3 days ago
250hps 5-7inches from the plants tops
nutes : biobiz top max 4/L and biobloom2/L
water every 2-3 days, 2 nutes 1 water only

any info would be greatly appreciated guys and gals
i'm panicking here

your burning the fuck out of them. your feeding schedule should be similar to a parabola. start with lower PPM, increase until half of the flowering cycle and start cutting down gradually once it gets to the end. you need to start flushing soon instead of blasting nutes

U have to flush them with fresh water asp
If not headach is more effect

Too much potassium. start flush now and don't give em any more nutes. Flush them once, then go back to your regular watering schedule. DO NOT PANIC and drown them with too much watering.

Cal/Mag... I promise you. Same exact shit happened to my first 2 grow at about the same time. Mine were JH. (trying to dig up pics)

Thanks for the response guys. Very helpful indeed.

So it only happened 1 out of 3 badly as in those pics
So I "flushed" (put loads of water thru pot until it came out bottom) that one.
The other two have very minor burns compared so will flush them tonight if they get worse.

As for the deficiency you talk about? How do I rectify that?

You shouldnt have flushed. They are not burnt, they are deficient, in P and trace elements. Use just the biobloom now every watering and they should become greener and leaves not so patchy in about a week.

Also is there a cooltube over the 250w hps? 5" is too close bro. View attachment 1819264

Masta11 said:

Thanks for the response guys. Very helpful indeed.

So it only happened 1 out of 3 badly as in those pics
So I "flushed" (put loads of water thru pot until it came out bottom) that one.
The other two have very minor burns compared so will flush them tonight if they get worse.

As for the deficiency you talk about? How do I rectify that?

Click to expand...

Epsom Salts. 1 Tbsp per gallon and water it in. The brown "burnt" areas are gone, but it will not progress, and new growth should look good.

Masta11 said:

I have this occuring on my plants at the top part mainly
a kinda browning yellowing curling up of the leaves as you see below

View attachment 1818294View attachment 1818296

end of week 5 it started, 2-3 days ago
250hps 5-7inches from the plants tops
nutes : biobiz top max 4/L and biobloom2/L
water every 2-3 days, 2 nutes 1 water only

any info would be greatly appreciated guys and gals
i'm panicking here

Click to expand...

Indeed, you shouldn't be feeding her any more nutes if she's that far into flowering my friend. You technically should be flushing during the last 2 to 3 weeks of flowering.

You see, whenever you feed a cannabis plant.. whatever nutrients it doesn't use from that feeding, gets stored in the plant for future use.. which is also why I've tried explaining that cannabis does NOT need to be fed every single week.. I personally feed mine 2 time per month.. and that's it.. that's all it needs.

The reason you want to be flushing during the final weeks instead of feeding more nutes.. is because whatever nutes the plant has stored in its 'emergency cells', the plant will summons these nutrients during the final weeks of flowering and put them to use... which again, is why you should be flushing right now instead of giving it more nutrients.

Good luck!

Jack Harer said:

Epsom Salts. 1 Tbsp per gallon and water it in. The brown "burnt" areas are gone, but it will not progress, and new growth should look good.

Click to expand...

This is also a good answer..

Thanks so much people, awesome advice.
Will try salts and no more nutes together?

No more nutes bro... no more.

like I said, I'm sure its got some nutes stored in its reserves... for emergencies.

so I would suggest you start flushing.

good luck!

If they only have 2-3 weeks or so left, Cannabisguru is right. They'll make it without adding more of anything.

Masta11 said:

I have this occuring on my plants at the top part mainly
a kinda browning yellowing curling up of the leaves as you see below

View attachment 1818294View attachment 1818296

end of week 5 it started, 2-3 days ago
250hps 5-7inches from the plants tops
nutes : biobiz top max 4/L and biobloom2/L
water every 2-3 days, 2 nutes 1 water only

any info would be greatly appreciated guys and gals
i'm panicking here

Click to expand...

Just addressed this in another thread. What's the NPK values and micros in your foods? If I had to guess, they are the typical wacked out high P and/or K and low N foods. You have a deficiency of micros, N and in general salts burn from the nutes. If you don't know what the NPK values are, can only parrot nute names, then you shouldn't be growing as you don't understand plant nutrition. Don't do like most around here, get yourself into trouble with cannabis specific foods which are usually poorly designed regarding mineral values, ask for help in forums plagued by the blind leading the blind, and then take advice from folks who don't have an answer other than "it's a pH problem" or "add epsom salts".

DO NOT use epsom salts as their appears to be no deficiency of Mg. That deficiency appears first at the lower branches working its way up to the mid part of the plant, usually no further. It shows as a whitish to pale yellow leaf necrosis (veins remain green, surrounding tissue is pale.)

DO NOT flush for weeks before harvest. Keep the leaves healthy until harvest for best yields. You have quite a ways to go before harvest based on the mass of long, fresh pistils. Leaf damage has been done, don't expect a recovery. If you get new leaf production, that would be a bonus, unless you fry them with bloom foods too.

Good luck,
UB

they seem to have stopped getting burned since i just watered with loads of water
we are in the second last week now (3rd last if they are slow), around 10-15% of the pistils have browned.
i don't think I'll feed again and just see what happens
it's my first indoor grow and it's for myself so I'm not mad for pushing for large quantities
seems to be the majority of advise is to stop using nutes in the last week or 2 anyway
i'll probably do one more water when the soil is totally dry and another if needs be in the last week.