What is this? 3 weeks info flower

Darkenedangel

Darkenedangel

Active Member
Hi guys, my plants have been doing pretty good up until now, growing in soil labeled as PH 6.0. Fed this plant 2 weeks ago with bloom and micro nutrients and it's been going great but this issue on my upper leaves is getting progressively worse - I don't know whether to feed them again or so if they need flushing. I have as of recent trimmed off excess leafs to increase light to the budding sites but only that a little every few days so not to over stress the plant. Could anyone give me some advice here? 2nd grow I've ever managed to get to flowering with. Pics attached, Adam.

PS - using jungle juice nutrients.
 

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Darkenedangel

Darkenedangel

Active Member
I've just been giving them tap water for the last few weeks though, this started after I trimmed some excess leafs off and so on. It's only around the top of the plant. Flushed the other night, wondering if it was nutrient burn and its now looking deficient and getting worse faster. Just noticed yellow and browning together.. and it would make sense it'd be a lack of potassium if they need quite a lot of it during flowering.
 

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Alienwidow

Alienwidow

Well-Known Member
Darkenedangel said:
I've just been giving them tap water for the last few weeks though, this started after I trimmed some excess leafs off and so on. It's only around the top of the plant. Flushed the other night, wondering if it was nutrient burn and its now looking deficient and getting worse faster. Just noticed yellow and browning together.. and it would make sense it'd be a lack of potassium if they need quite a lot of it during flowering.
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Well if you didnt up the dose and have just been feeding water, then youre probably right. Its starving. Signs of over feeding are clawing fan leaves, and dark almost black leaves. Signs of a deficiancy are yellowing lime leaves. With the feeding or lack of that youve been doing, its tough to say, but the rest of the plant looks really dark green, and the tips look burnt. Hows the temps at the top of the canopy and are they close to the light maybe?
 
Darkenedangel

Darkenedangel

Active Member
I fed them last night wondering if it was potassium deficiency but the symptoms are even worse this morning. Dosed 3ml bloom 3 ml micro in 1 litre of water. It came out at 700ppm. My tallest plant is 19 inches. The smaller one I have seems fine, a little bit burnt but fine. Strange to think this came on out of nowhere. Literally been taking notes of when I've fed them on what day. I guess maybe I should switch back to a lower potassium combination? (Grow and Micro instead of Bloom and Micro) Currently flushing the soil, gonna leave them to drink just water for the next few days until they stop burning. My lower leaves are a darker green I've noticed now you mentioned, slight clawing all round too. It's strange that it's mostly the top leaves burning, my grow light doesn't put off a lot of heat so it's probably only about 5 inches from the top - will raise it however to see if that could be what's making matters worse. The temperature at the top of the canopy is 23 Celsius.
 
Buba Blend

Buba Blend

Well-Known Member
Darkenedangel said:
I've just been giving them tap water for the last few weeks though, this started after I trimmed some excess leafs off and so on. It's only around the top of the plant. Flushed the other night, wondering if it was nutrient burn and its now looking deficient and getting worse faster. Just noticed yellow and browning together.. and it would make sense it'd be a lack of potassium if they need quite a lot of it during flowering.
Click to expand...
Darkenedangel said:
I fed them last night wondering if it was potassium deficiency but the symptoms are even worse this morning. Dosed 3ml bloom 3 ml micro in 1 litre of water. It came out at 700ppm. My tallest plant is 19 inches. The smaller one I have seems fine, a little bit burnt but fine. Strange to think this came on out of nowhere. Literally been taking notes of when I've fed them on what day. I guess maybe I should switch back to a lower potassium combination? (Grow and Micro instead of Bloom and Micro) Currently flushing the soil, gonna leave them to drink just water for the next few days until they stop burning. My lower leaves are a darker green I've noticed now you mentioned, slight clawing all round too. It's strange that it's mostly the top leaves burning, my grow light doesn't put off a lot of heat so it's probably only about 5 inches from the top - will raise it however to see if that could be what's making matters worse. The temperature at the top of the canopy is 23 Celsius.
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Yesterday you said you flushed the other day. Today you said you flushed again today, if I read it correctly.
Have you flushed at any other times this grow?
 
firsttimeARE

firsttimeARE

Well-Known Member
Looks like a K def. Tips of new growth will yellow and that will move along the edges and then each serrated tip,will burn and look like nute burn.

An easy way to differentiate the two is answering yes to any of the following.

Are the stems brittle? Like does a leaf break off easily? Is it stretching? Leaf tip curl I can tell from the pics, thats another K def. Symptom.

K def. Tip curl is different than N tox. Curl which is more like a claw where the edges and tip curl in. Leaves will also be dark green.
 
firsttimeARE

firsttimeARE

Well-Known Member
You mention its still growing, which too many nutes would stunt the growth.

It could be your pH is off causing the K to not be absorbed.
 
Darkenedangel

Darkenedangel

Active Member
Correct, I flushed to see if it would stop burning at first, carried on so I added in bloom food. That went terribly causing more burn. Would checking runoff be good for pH testing? They're not brittle so I guess it just decided there was too much nutrient after I'd trimmed a few days prior. I'm growing a strain called jungle wreck. Thanks for the advice on different between potassium deficiency and nutrient burn. Doesn't seem to be posted about much. Its where I've struggled for some time. It's been 12 hours since I flushed this morning (2nd flush) and it seems the burning has stopped. I'll make note of that advice
 
Buba Blend

Buba Blend

Well-Known Member
Darkenedangel said:
Correct, I flushed to see if it would stop burning at first, carried on so I added in bloom food. That went terribly causing more burn. Would checking runoff be good for pH testing? They're not brittle so I guess it just decided there was too much nutrient after I'd trimmed a few days prior. I'm growing a strain called jungle wreck. Thanks for the advice on different between potassium deficiency and nutrient burn. Doesn't seem to be posted about much. Its where I've struggled for some time. It's been 12 hours since I flushed this morning (2nd flush) and it seems the burning has stopped. I'll make note of that advice
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Darkenedangel said:
It's getting worse since the flush. This is showing around lower leaves.. please help
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No, checking run off is not the way to test the soil PH. If you do have a low soil PH, flushing made it worse.
Might help if you can answer these three questions.
What size are your pots?
How many days between watering?
How much water do you use when watering each watering?
 
Darkenedangel

Darkenedangel

Active Member
The soil I bought had added john innes, was listed as PH 6 for acid loving plants. Can't remember specifically the brand as I don't have the bag now. My pots are around 20 liters each, I only water when the soil is dry, when I do water I add maybe half a liter of water? Just enough to not flood the pot but enough to water the plants. I know for sure that they're under fed at this point - soil run off comes out at 80ppms. Probably water every 2 days? it's basically when the soil is dry.
 
Buba Blend

Buba Blend

Well-Known Member
Darkenedangel said:
The soil I bought had added john innes, was listed as PH 6 for acid loving plants. Can't remember specifically the brand as I don't have the bag now. My pots are around 20 liters each, I only water when the soil is dry, when I do water I add maybe half a liter of water? Just enough to not flood the pot but enough to water the plants. I know for sure that they're under fed at this point - soil run off comes out at 80ppms. Probably water every 2 days? it's basically when the soil is dry.
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OK that's good, I wanted to see if you were using to much water when watering and that does not seem to be the case. No more flushing and stop checking the runoff PH. Runoff PH will not give accurate information. You don't have to believe me or anyone else. Just keep an open mind to what I said. Good Luck finding your solution. Your skills will improve with each grow, even the rough ones.
 
Dr. Who

Dr. Who

Well-Known Member
Darkenedangel said:
I've just been giving them tap water for the last few weeks though, this started after I trimmed some excess leafs off and so on. It's only around the top of the plant. Flushed the other night, wondering if it was nutrient burn and its now looking deficient and getting worse faster. Just noticed yellow and browning together.. and it would make sense it'd be a lack of potassium if they need quite a lot of it during flowering.
Click to expand...
Less then you think and not till mid bloom!
 
Darkenedangel

Darkenedangel

Active Member
Buba Blend said:
OK that's good, I wanted to see if you were using to much water when watering and that does not seem to be the case. No more flushing and stop checking the runoff PH. Runoff PH will not give accurate information. You don't have to believe me or anyone else. Just keep an open mind to what I said. Good Luck finding your solution. Your skills will improve with each grow, even the rough ones.
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Fair enough, how would you suggest I check PH?

Dr. Who said:
Less then you think and not till mid bloom!
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The strain is jungle wreck (8 weeks flowering time) so I guess getting to mid bloom now?
 
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