whats wrong with this leaf?

Absynth420 · 11-01-2008, 02:31 AM

all my other plants of the same strain are doing beautiflly. this plant had the first set of leaves do this yesterday, it is spreading to the next higher set, but not so much yet. it looks like a cal/mag deficiency, the leaves are a little curled upward, but on only one plant? im just curious to any ideas anyone might have...

Absynth420 · 11-02-2008, 02:55 PM

edit : BUMP!

its spread to one other plant already. a slow necrosis of the inner leaf, then they get crispy and curl upward. whats going on?

anybody? please?

elric40 · 11-02-2008, 04:51 PM

Your PH OK? Growing Medium?

stoneric · 11-02-2008, 06:10 PM

Wish I could help. Never encountered anything similar.

Absynth420 · 11-02-2008, 06:45 PM

pH was a little high, but corrected to about high 5 or almost 6.. ill post some new pics in a minute, its gotten different. now the leaf edges (on the side) are curing upward and the problem is spreading. pics incoming in less than 5 min...

EDIT: growing medium : rockwool cube in hydroton. deep water culture. GH nutes, grow micro and bloom. and cal mag by botanicare is what im using. since theyre babies, im only using half of what the nutrient schedule calls for, i didnt wanna burn em.
could i be under fertilizing? hope these pics help...

Absynth420 · 11-02-2008, 07:12 PM

ok heres how its progressed....

highanddry · 11-02-2008, 09:08 PM

fert burn

Absynth420 · 11-02-2008, 09:19 PM

damn, i guess even half strength GH nutes (2.5 ml grow, micro and bloom and 5 ml cal mag per 2 gallons) is too much for this strain (i brought some seeds back from jamaica and i thought they would need a lot of nutes since its so rich there) but i guess i was wrong. ill switch out the tub right now and post the results in a few days.
thanks again everyone.

gonna have to rework my whole gameplan and maybe start seedlings back on 1/4 that after flush.

should i use florakleen? i have some available. would that help detoxify the plants faster?

Peace seeker · 11-02-2008, 11:51 PM

what everyone esle said,

plus check the distance between the lamp and your plants

Absynth420 · 11-03-2008, 06:20 AM

i think the light distance is ok. i cant feel any heat at all at plant level. its a 250w HPS, 16 in. from the plants. the internode spacing is super tight, so i think they like the lighting... but as far as HID'd go, with their high intensity, should i maybe move it a little further away? they are getting LST'd right now, so i want to keep the light as close as possible.

**farmergiles** · 11-03-2008, 06:26 AM

16" should be fine.

Did you see the plants the seeds came, just wondering if the strain is very sensitive to nutrient overdose. Looks like od rather than under feeding.

Absynth420 · 11-03-2008, 06:46 AM

well check the way the leaf margins are turning upward, but the veins are still nice and green... this page says thats a Mg deficiency:

Marijuana Nutrient Disorders

look at number 3 on that chart and then tell me what you think. it matches most closely.

im still following your advice, everybody, but im trying to exhaust all possibilities. i need to nail this problem! it always happens to me in a DWC setup... i can grow perfect in just about any other medium, but my damn soil was on backorder so i got impatient and started up the old setup again

EDIT : To Farmergiles, i didnt see the plants but i know they were grown on blue mountain, in Jamaica. ive gone several times and have a reliable, trustworthy hookup there. they just call it the hi grade, but it was some of the dankest ive ever seen. and coming from fertile Jamaica, i would figure that would make them want tons of fertilizer, thats another reason im thinking its that Mg deficiency..... but well find out soon enough

**farmergiles** · 11-03-2008, 08:09 AM

It`s tricky because if they get too much of certain nutes it will lock up other ones (especially trace stuff like magnesium and iron)

Absynth420 · 11-03-2008, 05:37 PM

well in the almost 24 hours since i switched to pure, distilled water, the problem looks 5 times worse... i still dont understand how it can be fert burn, ive done this in DWC before, and it got a little bad, but this is going nuts....

im sorry to be skeptical, but to me it looks like a mag deficiency... ALL the leaf edges are curling upward. not the tips, mind you, but the edges. which is indicative of Mg deficiency.

add to the fact that ive been using half strength nutes, and i come up with deficiency, not overdose.

on my last grow, i used a similar indica dominant cross, and used the FULL nute regiment, and ended up with a very respectable harvest, so i dont see how this is different, but i hope time will heal all wounds.

Absynth420 · 11-03-2008, 07:06 PM

definitely not gnats, i checked for them already. and the pH was only off by a half a point to a point for 2-3 days, max, when i went out of town (3 days assuming the pH changed the day i left). as soon as i got back to town, i changed tubs, (i use 2 so i can just rotate and clean them easier...) and made sure the pH was a high 5. so i hope it wasnt a pH issue.

anyways thanks for all the help, and ill let you guys know how everything comes out. im gonna leave em in pure pH balanced water for another 48 hours, for a total of 72 hrs. and then ill post up some more pics and see if it would be ok to add fresh water again and nutes...

edit: i use liquid pH tester from General Hydroponics. really need an electronic one and an EC/TDS meter, but maybe after this crop i can buy one. i usually as a rule, dont sell any of my harvest. im a third year med student and a bunch of us have gotten together and started a medical donation community. but i think this time i may have to sell a little to come up with fundage for more equipment.

smokinsince60's · 11-07-2008, 01:06 PM

I think your ph is too low. 6.5 - 7 is best in my experience. 5 is on the acid side, 7 being neutral, looks like burn from acid to me. Also what are you checking your ph with? I just use the little strips, easy, cheap and always accurate.

Dandaweedman · 11-07-2008, 01:14 PM

Quote:

Originally Posted by Absynth420

im sorry to be skeptical, but to me it looks like a mag deficiency... ALL the leaf edges are curling upward. not the tips, mind you, but the edges. which is indicative of Mg deficiency.

Mg def usually starts with the very tips (ends/point) of the leaves turning sideways some.
Looks like it could be a phos def, or chlorine toxicity. How about a shot of the stems/meristem?
Curling of the side edges usually signals a heat issue.

11-01-2008, 02:31 AM	#1 (permalink)
Absynth420 Jedi Join Date: Jul 2008 Location: Undisclosed Posts: 132 Thanks: 65 Thanked 46 Times in 21 Posts	whats wrong with this leaf? all my other plants of the same strain are doing beautiflly. this plant had the first set of leaves do this yesterday, it is spreading to the next higher set, but not so much yet. it looks like a cal/mag deficiency, the leaves are a little curled upward, but on only one plant? im just curious to any ideas anyone might have... Attached Images

11-02-2008, 06:45 PM	#5 (permalink)
Absynth420 Jedi Join Date: Jul 2008 Location: Undisclosed Posts: 132 Thanks: 65 Thanked 46 Times in 21 Posts	pH was a little high, but corrected to about high 5 or almost 6.. ill post some new pics in a minute, its gotten different. now the leaf edges (on the side) are curing upward and the problem is spreading. pics incoming in less than 5 min... EDIT: growing medium : rockwool cube in hydroton. deep water culture. GH nutes, grow micro and bloom. and cal mag by botanicare is what im using. since theyre babies, im only using half of what the nutrient schedule calls for, i didnt wanna burn em. could i be under fertilizing? hope these pics help... Last edited by Absynth420; 11-02-2008 at 06:47 PM.

11-02-2008, 07:12 PM	#6 (permalink)
Absynth420 Jedi Join Date: Jul 2008 Location: Undisclosed Posts: 132 Thanks: 65 Thanked 46 Times in 21 Posts	ok heres how its progressed.... Attached Images

11-03-2008, 06:26 AM	#11 (permalink)
farmergiles Yahookan Join Date: Sep 2006 Location: In My Fire Engine Posts: 7,134 Thanks: 2,040 Thanked 3,167 Times in 2,191 Posts	16" should be fine. Did you see the plants the seeds came, just wondering if the strain is very sensitive to nutrient overdose. Looks like od rather than under feeding. __________________ Cultivate a stoic calmness *Fuck the Monkeys*

11-03-2008, 06:46 AM	#12 (permalink)
Absynth420 Jedi Join Date: Jul 2008 Location: Undisclosed Posts: 132 Thanks: 65 Thanked 46 Times in 21 Posts	well check the way the leaf margins are turning upward, but the veins are still nice and green... this page says thats a Mg deficiency: Marijuana Nutrient Disorders look at number 3 on that chart and then tell me what you think. it matches most closely. im still following your advice, everybody, but im trying to exhaust all possibilities. i need to nail this problem! it always happens to me in a DWC setup... i can grow perfect in just about any other medium, but my damn soil was on backorder so i got impatient and started up the old setup again EDIT : To Farmergiles, i didnt see the plants but i know they were grown on blue mountain, in Jamaica. ive gone several times and have a reliable, trustworthy hookup there. they just call it the hi grade, but it was some of the dankest ive ever seen. and coming from fertile Jamaica, i would figure that would make them want tons of fertilizer, thats another reason im thinking its that Mg deficiency..... but well find out soon enough Last edited by Absynth420; 11-03-2008 at 06:51 AM.

11-02-2008, 02:55 PM	#2 (permalink)
Absynth420 Jedi Join Date: Jul 2008 Location: Undisclosed Posts: 132 Thanks: 65 Thanked 46 Times in 21 Posts	edit : BUMP! its spread to one other plant already. a slow necrosis of the inner leaf, then they get crispy and curl upward. whats going on? anybody? please?

11-02-2008, 04:51 PM	#3 (permalink)
elric40 YaHookan Join Date: Oct 2008 Location: USA Posts: 123 Thanks: 18 Thanked 38 Times in 27 Posts	Your PH OK? Growing Medium?

11-02-2008, 06:10 PM	#4 (permalink)
stoneric bougeman Join Date: Aug 2004 Posts: 5,222 Thanks: 430 Thanked 1,246 Times in 892 Posts	Wish I could help. Never encountered anything similar.

11-02-2008, 09:08 PM	#7 (permalink)
highanddry YaHookan Join Date: May 2006 Posts: 729 Thanks: 81 Thanked 73 Times in 52 Posts	fert burn

11-02-2008, 09:19 PM	#8 (permalink)
Absynth420 Jedi Join Date: Jul 2008 Location: Undisclosed Posts: 132 Thanks: 65 Thanked 46 Times in 21 Posts	damn, i guess even half strength GH nutes (2.5 ml grow, micro and bloom and 5 ml cal mag per 2 gallons) is too much for this strain (i brought some seeds back from jamaica and i thought they would need a lot of nutes since its so rich there) but i guess i was wrong. ill switch out the tub right now and post the results in a few days. thanks again everyone. gonna have to rework my whole gameplan and maybe start seedlings back on 1/4 that after flush. should i use florakleen? i have some available. would that help detoxify the plants faster?

11-02-2008, 11:51 PM	#9 (permalink)
Peace seeker free the herb Join Date: Nov 2003 Posts: 6,830 Thanks: 749 Thanked 530 Times in 376 Posts	what everyone esle said, plus check the distance between the lamp and your plants

11-03-2008, 06:20 AM	#10 (permalink)
Absynth420 Jedi Join Date: Jul 2008 Location: Undisclosed Posts: 132 Thanks: 65 Thanked 46 Times in 21 Posts	i think the light distance is ok. i cant feel any heat at all at plant level. its a 250w HPS, 16 in. from the plants. the internode spacing is super tight, so i think they like the lighting... but as far as HID'd go, with their high intensity, should i maybe move it a little further away? they are getting LST'd right now, so i want to keep the light as close as possible.

11-03-2008, 08:09 AM	#13 (permalink)
farmergiles Yahookan Join Date: Sep 2006 Location: In My Fire Engine Posts: 7,134 Thanks: 2,040 Thanked 3,167 Times in 2,191 Posts	It`s tricky because if they get too much of certain nutes it will lock up other ones (especially trace stuff like magnesium and iron) __________________ Cultivate a stoic calmness *Fuck the Monkeys*

11-03-2008, 05:37 PM	#14 (permalink)
Absynth420 Jedi Join Date: Jul 2008 Location: Undisclosed Posts: 132 Thanks: 65 Thanked 46 Times in 21 Posts	well in the almost 24 hours since i switched to pure, distilled water, the problem looks 5 times worse... i still dont understand how it can be fert burn, ive done this in DWC before, and it got a little bad, but this is going nuts.... im sorry to be skeptical, but to me it looks like a mag deficiency... ALL the leaf edges are curling upward. not the tips, mind you, but the edges. which is indicative of Mg deficiency. add to the fact that ive been using half strength nutes, and i come up with deficiency, not overdose. on my last grow, i used a similar indica dominant cross, and used the FULL nute regiment, and ended up with a very respectable harvest, so i dont see how this is different, but i hope time will heal all wounds.

11-03-2008, 07:06 PM	#15 (permalink)
Absynth420 Jedi Join Date: Jul 2008 Location: Undisclosed Posts: 132 Thanks: 65 Thanked 46 Times in 21 Posts	definitely not gnats, i checked for them already. and the pH was only off by a half a point to a point for 2-3 days, max, when i went out of town (3 days assuming the pH changed the day i left). as soon as i got back to town, i changed tubs, (i use 2 so i can just rotate and clean them easier...) and made sure the pH was a high 5. so i hope it wasnt a pH issue. anyways thanks for all the help, and ill let you guys know how everything comes out. im gonna leave em in pure pH balanced water for another 48 hours, for a total of 72 hrs. and then ill post up some more pics and see if it would be ok to add fresh water again and nutes... edit: i use liquid pH tester from General Hydroponics. really need an electronic one and an EC/TDS meter, but maybe after this crop i can buy one. i usually as a rule, dont sell any of my harvest. im a third year med student and a bunch of us have gotten together and started a medical donation community. but i think this time i may have to sell a little to come up with fundage for more equipment. Last edited by Absynth420; 11-03-2008 at 07:43 PM.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)

11-07-2008, 01:06 PM	#16 (permalink)
smokinsince60's YaHookan Join Date: Jul 2006 Location: tiny town in CA Posts: 52 Thanks: 0 Thanked 8 Times in 7 Posts	I think your ph is too low. 6.5 - 7 is best in my experience. 5 is on the acid side, 7 being neutral, looks like burn from acid to me. Also what are you checking your ph with? I just use the little strips, easy, cheap and always accurate.

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode