problems with nutes, and leaf curl

[ruufuus]

hey guys, in the end of week three with my girls, and they are growing quite well, but i am noticing what i think is nute burn and heat stress, but i decided to bring it to you guys for a more experienced opinion. so here it is...

 

[Jericho]

Finding it hard to see the pics properly because of the interference from the light.
Can you take the plant out or shut the light off and use a flash to take the pic. this way we can get a clean picture. Also try taking the pic from above the light, that helps.

What are the temps at the plants? what nutes and schedule/amounts are you using?

 

[ruufuus]

i will take some new ones today. the temp varies between 60 and 75. which i know isnt optimal. i use gh flora, and i feed every other watering. i think i mixed the nutes wrong is all, and the plants are still growing quite wonderfully, i just want to be sure. ill have more pics up later today.

 

[ruufuus]

this one here is the one i think has light or heat stress, a few of the leaves are cupping downward, and they were kinda crispy, but now they are oily. the undergrowth from the new shoots look perfectly healthy though, which kinda leads me to believe the light is too close, but none of the other plants are having the same problem. also these bigger not so healthy leaves are kinda shading the new healthy shoots, so i kinda think i should just cut them off, what do you all think?

 

[Growdude]

this one here is the one i think has light or heat stress, a few of the leaves are cupping downward, and they were kinda crispy, but now they are oily. the undergrowth from the new shoots look perfectly healthy though, which kinda leads me to believe the light is too close, but none of the other plants are having the same problem. also these bigger not so healthy leaves are kinda shading the new healthy shoots, so i kinda think i should just cut them off, what do you all think?

First dont cut them off and tell us more about what you have going on.

What are you feeding them and how strong? ppm ?
what Ph are you at?

Your temps dont say heat stress, how close and what was your light?
Normally when thats too close it bleach's the leaf and rolls the edges up.

Why do you think you messed up your nutes?

That stuff will help get an accurate diagnosis.

 

[ruufuus]

First dont cut them off and tell us more about what you have going on.

i am giving them gh flora series, and i gave them a mild vegatative growth dose, i do not have a ppm meter, my ph is about 5.8-6.0 when i feed them. my light is about 6-8" from the tallest one, and it is a 150w hps. i think i may have concentrated the nutes a little stronger than necessary, as i followed the instructions to mix 2 gallons of solution, but had slightly less than 2 gallongs of water to mix them into.

 

[ruufuus]

and as far as the curling leafs, i started to have trouble with it earlier on, when the leaves were smaller, so i backed the light off a bit. the leaves that were affected havent really uncurled but they are very oily now. but the new shoots on the fresh nodes arent having any problems, they are growing excellent since i started lst, that is why i ask if i should cut the curled leaves off because they are shading the new shoots that look so good.

 

[ruufuus]

it could just be one of those phenos that grows like crap. are other plants affected?

i gave a plant of mne the chop last night cause of was sick of seeing it, smelling it in the air, and taking care of it. just a bad pheno that never produced or grew properly, nothing i could of done to help it.

i put my auto seedlings as clos to the light as possible (400-600watts of hps) and new flowering plants go as close as possible also, but i do have aircooled hoods. i feel they handle more light than people believe.

the other plants are not having the same leaf curl, but as far as growing like crap, it is my biggest and fastest growing plant in the bunch....

 

[Hushpuppy]

Are you in soil or coco? I seem to remember you saying before that you are in coco. It looks like to me that the light may have been a little too intense early on or the nutes just got a little concentrated and caused a bit of nute burn. If you are in coco be careful to not over feed as coco holds nutes very well.

Also get some cal/mag solution or dolomite lime to add to the coco for them as the coco often has an odd calcium and magnesium exchange rate which will cause the plants to get a cal/mag deficiency.

Don't cut off those leaves unless they get more than 50% necrotic. The new growth will find its way to the light soon enough, mean time if those big leaves are still living(they look alive enough) then they are producing necessary energy for growth.

 

[Hushpuppy]

yor ph is kinda low, that could be a problem. you want around 6.5

That is tricky to call as I believe he is in coco. I can't remember if the PH for soilless should be the same for Hydro (5.4-6.4) or the same as for soil (6.5-7.4). :watchplant:

 

[ruufuus]

yor ph is kinda low, that could be a problem. you want around 6.5

i was wondering about this, i couldnt really find a definitive answer for what my ph should be in coco

 

[ruufuus]

That is tricky to call as I believe he is in coco. I can't remember if the PH for soilless should be the same for Hydro (5.4-6.4) or the same as for soil (6.5-7.4). :watchplant:

it is coco. and as for feeding them too much, how much nutrient solution should i give them per watering? they are in 3 gallon grow bags.

 

[Hushpuppy]

Unfortunately I can't find the information on ph in soilless medium but I am about sure that for coco that ph should be like with hydro(5.4-6.4)and optimum at 5.8-6.0. As far as feeding with the GH flora, I don't know about their feeding regamin but I would say you really need to get you a ppm or EC meter so that you can maintain a proper level of nutes.

In soil with organic or medium controlled nutes its not so important but with soilless and hydro you have to be more strict with the chemicals. I generally start out with new plant strains or new nute brands by mixing to 1/4 of the strength of the manufacturers recommendations (or about 200-300ppm) then after a week or two depending on the growth of the plant, I bump up to 300-400ppm (or 1/3 manufact recs) after another week or two(depending on the plants' growth rates) I bump up again to 500-600ppm (or about 1/2).

I continue this adjusting upwards until I see a little nute burn begin(a darkening of leaves or tips browning) then back off a little. The numbers will vary with strains and nute brands, and even with the conditions of your grow. I would say that yer plants are strong enough now to run at least half strength, but yu should definitely get a ppm or ec meter (and calibrating fluid).

Just pouring a dab or two of each chem into the mix and saying "yeah that's about right" will come back to bite you on every grow (just ask my brother.) I tried to tell him to measure and he would tell me, "oh I know exactly how much to add now, I don't have to measure it" Then by the end of a grow I would hear, "yeah I messed up and got a little heavy one time and burned them". What he finally realized was that he was not only wasting expensive nutes, he was costing himself several ounces of yeild each time.

 

[ruufuus]

i will try to keep my ph within those parameters. thanks for the advice!