Plant hospital

kpmarine

kpmarine

Well-Known Member
bigboybuds said:
Hey poly, been reading through this thread and thought you might be able to help.

A little background- This is day 5 of my new grow. I transplanted these clones out of veg to new pots. Using soil. Its kind of my own mixture.. Some Connoisseur soil (made by Fafard) used it my last grow, with no problems.. I mixed in a bag of cheap potting soil, and a bag of sheep manure. I think the npk of the manure was .05/.05/.05 . So nothing huge.

I am vegging under a 600watt MH, light is about 24in from the canopy. Running 18/6 atm.
Using AN M/G/B 3/2/1 for veg, about half strength. Did a soil PH test its last night (dont have meter) with a test kit, and it measured nutural.

Noticed this starting yesterday, and it got worse over night. These pics were taken about 10 mins ago. What do you think?

View attachment 2109568View attachment 2109571View attachment 2109570View attachment 2109569

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Looks like phosphorous deficiency. Alot of things can cause that though. Since you used a test strip, I'd give ph a second look, those colors can be close. From what I've read, P lockout can happen over a ph of 7. Though isn't soil supposed to be a ph of 6.5 at most?
 
polyarcturus

polyarcturus

Well-Known Member
Heisenberg37 said:
I pulled the light so it is about 11" away now. The yellowing started on the middle upper half of the plant. On the leaves itself started by the leaves turning yellow. I thought that was normal in flowering, but then those brown spots started appearing and spreading and soon the leaves twisted. So yeah that happened slowly over the course of 6-7 days. Should I just step back and let her sit? I already ran 2 gallons of RO 6.7 PH water through her last night.
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step back, let her dry out some give her some water with a magnesium supplement. she is very deficient this types of change is probably meaning flowering is coming to a halt soon so you might want to add some mag and go with plain water till she is ready to harvest.
 
polyarcturus

polyarcturus

Well-Known Member
bigboybuds said:
Hey poly, been reading through this thread and thought you might be able to help.

A little background- This is day 5 of my new grow. I transplanted these clones out of veg to new pots. Using soil. Its kind of my own mixture.. Some Connoisseur soil (made by Fafard) used it my last grow, with no problems.. I mixed in a bag of cheap potting soil, and a bag of sheep manure. I think the npk of the manure was .05/.05/.05 . So nothing huge.

I am vegging under a 600watt MH, light is about 24in from the canopy. Running 18/6 atm.
Using AN M/G/B 3/2/1 for veg, about half strength. Did a soil PH test its last night (dont have meter) with a test kit, and it measured nutural.

Noticed this starting yesterday, and it got worse over night. These pics were taken about 10 mins ago. What do you think?

View attachment 2109568View attachment 2109571View attachment 2109570View attachment 2109569

Click to expand...
well this looks like a heavy metal def. clasic light spots showing off missing boron, zinc and Iron. miricle grow for vegging plants is the best way to take care of this.
 
H

Heisenberg37

Active Member
polyarcturus said:
step back, let her dry out some give her some water with a magnesium supplement. she is very deficient this types of change is probably meaning flowering is coming to a halt soon so you might want to add some mag and go with plain water till she is ready to harvest.
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She is at 5 weeks into flowering now, how many more weeks do you think it will be? What magnesium supplement would you recommend? Thanks for all the help, I'll post back in a day or two with new pictures if she starts to look better or worse.
 
bigboybuds

bigboybuds

Well-Known Member
polyarcturus said:
well this looks like a heavy metal def. clasic light spots showing off missing boron, zinc and Iron. miricle grow for vegging plants is the best way to take care of this.
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Another question. If the PH of my soil is reading to high, and I know my tap water is right around perfect (I know this because my buddy used to fill his jugs at my house b/c he tested my water with a PH meter) if I use just that water, will it eventually balance out the ph of the soil?
 
polyarcturus

polyarcturus

Well-Known Member
Heisenberg37 said:
She is at 5 weeks into flowering now, how many more weeks do you think it will be? What magnesium supplement would you recommend? Thanks for all the help, I'll post back in a day or two with new pictures if she starts to look better or worse.
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half a vitamin pill works for me as far micro nutes go, some people go to the hydro store and buy stuff like calmag either will work.
 
polyarcturus

polyarcturus

Well-Known Member
bigboybuds said:
Another question. If the PH of my soil is reading to high, and I know my tap water is right around perfect (I know this because my buddy used to fill his jugs at my house b/c he tested my water with a PH meter) if I use just that water, will it eventually balance out the ph of the soil?
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what is the pH of your water? and pH of tap water doesn't really mean a thing, ppm would mean something but not relevant to these problems. your tap ph and your soil pH are probably both right around 7.0 i would just add some lemon juice(5gal about 10-20 ml of concentrate) in my watering as your plants could just be locking out P due to the neutral pH. if its that bad you need to repot in a mix with some peatmoss.

remember to let all your tap water sit or be bubbled for at least 12 hours
 
H

headshot11

Member
Heypolyarcturus, I'd appreciate if you can help me with this.

I just switched to flower, and I'm pretty certain these showed up within a day or so. It seems to be potassium deficiency, but I'd like a second opinion. There are light green, almost brownish hue streaks on the leaf margins of my older fan leaves. The spots also feel "thin" and waxy or glassy almost compared to the rest of the leaf. The plant is 6 weeks old, had some issues with nute burn originally so I lost about 2 weeks. It's about 10" tall, and has quite a few nodes

5 gal dwc
pH 5.75 (right now)
ppm just raised it to 585 (0.5 nacl) my pH rises every 12 hours to 5.85 or so and I'll pH down to 5.5 every couple of days. PPM drops 20-30 each day
Lucas formula and some epsom salts (not much 20-30ppm), currently I just add 3ml micro/6ml bloom every day or so trying to find the sweet spot of equilibrium.
res temps are between 60-65F, air is 60-62F at night, 70-72 with lights on

Pic --> http://i.imgur.com/2QUrk.jpg
 
polyarcturus

polyarcturus

Well-Known Member
headshot11 said:
Heypolyarcturus, I'd appreciate if you can help me with this.

I just switched to flower, and I'm pretty certain these showed up within a day or so. It seems to be potassium deficiency, but I'd like a second opinion. There are light green, almost brownish hue streaks on the leaf margins of my older fan leaves. The spots also feel "thin" and waxy or glassy almost compared to the rest of the leaf. The plant is 6 weeks old, had some issues with nute burn originally so I lost about 2 weeks. It's about 10" tall, and has quite a few nodes

5 gal dwc
pH 5.75 (right now)
ppm just raised it to 585 (0.5 nacl) my pH rises every 12 hours to 5.85 or so and I'll pH down to 5.5 every couple of days. PPM drops 20-30 each day
Lucas formula and some epsom salts (not much 20-30ppm), currently I just add 3ml micro/6ml bloom every day or so trying to find the sweet spot of equilibrium.
res temps are between 60-65F, air is 60-62F at night, 70-72 with lights on

Pic --> http://i.imgur.com/2QUrk.jpg
Click to expand...
too me it looks like magnesium lock out stop feeding the Epsom salts and use some plain water.
 
H

headshot11

Member
Headshot..I wish everyone posted nice pics like that. Clear and focused..
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Thanks, believe it or not it's a 3.2 megapixel 8-9 year old camera

polyarcturus said:
too me it looks like magnesium lock out stop feeding the Epsom salts and use some plain water.
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Thanks for the reply; I haven't fed them much epsom salts (not more than 50ppm total over the course of 2 weeks). What could be causing a mag lockout? I'm using 2ppm R/O water as well. Do you know if cold can cause poor mag uptake? Most of the time overnight it drops to 16c

Last night I added 5ml potassium silicate, 600ppm and 5.82 pH. This morning it was 556ppm, 5.92pH. When I called GenHydro they said I was underfeeding, so could that be a possibility and I should crank it up to 650-700ppm lucas formula?

Also, I was doing some research on potassium deficiency and found this which seems to describe it perfectly.

Deficiency signs of potassium are: plants are the tallest and appear healthy. Older leaves mottle and yellow between veins, followed by whole leaves that turn dark yellow and die. Flower and fruit drop are common problems associated with potassium deficiency. Potassium is usually locked out by high salinity.
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That seems like it's it, this is only on the tallest plant (out of 7 in the dwc) and the mottle on the leaf margins. Apart from the 2-4 fan leaves affected it looks good. So I really don't know.

Also you mentioned use plain water, you think I should flush my dwc and use plain r/o even when I just switched to flower?
 
polyarcturus

polyarcturus

Well-Known Member
never plain RO. i say replace the water and put nutes in at half strength or third strength and see if this fixes the problem. you got to be careful as you just swithced to flower and you dont want them to stress, you may be underfeeding but this is why the lucas formula is hard to work with. high salinity is caused by plant waste and unabsorbed nutes. thats seems to hit the nail on the head
 
H

headshot11

Member
I just checked today when the lights came on, that one leaf got all brittle and I picked off the one finger. It was completely brittle and just crushed apart with no effort.

ppm was 556 this morning just before turning off the lights, and pH 5.92. Now when the lights came on, the ppm was 601 and 6.0pH. I'll recheck later to see if the ppm was wrong just because the lights came on.

I already did a res change like a week or so ago and only added in small doses of lucas formula, you really think I should do another res change? I add in aquashield to create a positive rhizosphere - I'm not sure if it takes care of plant waste though.
 
polyarcturus

polyarcturus

Well-Known Member
i would post a new pic maybe of the whole plant. this will help more than a leaf, but at this point im stumped. sounds like you are doing things right give it more time a days not gonna make the difference, maybe 2-3 will. i would change the res nothing better for plants than plain water(well ro water with small amount of nutes in hydro)
 
M

mk3coupe

Well-Known Member
hello, I am hoping you will be able to help me fix my problem. I am in a tent, I am in pro-mix soil less mix, I water only when dry and its going good. The strain is Super Lemon Haze. and only them with this problem.2012-04-08 01.32.06.jpg2012-04-08 01.33.16.jpg2012-04-08 01.35.18.jpg I know my light is not to close. My temps feel alright, they are in the 3 week of 12/12 light, no leaks. temp with light on is 72, light off is 68. All the other plants are great, ww, blueberry, tangerine dream. They seem to all be indicas though so maybe that is the problem? Any help would be greatly appreciated.
 
polyarcturus

polyarcturus

Well-Known Member
whats your soil mix specifically? pot size?
when you say you water when dry, how dry?
when you last fed hat kind of nutes? how much?
this looks like a simple problem that im thinking is one of the 3, roots need to reallly dry out, like completely, might be root bound or soil is not well mixed and is acidic from promix, or its a nute lockout from over nutrients and you need to flush.
 
M

mk3coupe

Well-Known Member
It is pro mix 4, pot size is 4 gallon, When I water i push 12 finger to the knuckle to see if its wet at all and is so then dont water, if it is dry then I water.I am feeding her open sesame right now, and only 1/4 teaspoon.
 
polyarcturus

polyarcturus

Well-Known Member
im thinking repot her and knock some of that oled dirt off make sure you mix it up good just looks like plant wants to grow but cant, when you repot water maybe 12 oz just enough to settle the dirts and let it dry out good this time like so dry it feels like dry dirt when you pick it up. wet dirt weighs several pounds dry dirts weights 14 ozs. or just under a lb. i mean if you pick up the pot and it feels like there is something in it, it needs to dry more, then give her a real good watering.
 
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