Top shoots thin and twisting wk 2 flower in coco....

[Meraxes]

is this a signifcant problem? i have 400w hps little less than a foot away, using Rezdogs 6/9 GH formula in coco. been adding 5 ml calmag plus with the solution. do you count the cal mag withe the base solution's ppm? i recently flushed with about 500 ppm epsom with 5.8 ph. tap is 69 ppm. going to try foliar with epsom from now on so it dosent screw with ec. should my 400 be more than a foot over canopy? ph is 5.6 going in all the time. any ideas? rep

 

[Meraxes]

its claw like but i dont think its too much N. just using Micro for N.

 

[ogkush420]

Back off your nutes/EC

 

[SeaMaiden]

Doesn't look like a Ca/Mg problem to me, they actually appear to be unhappy with conditions relating to temperatures and relative humidity (aka VPD =vapor pressure deficit). I would let pH range from a low of 5.8 to a high of 6.2 as well, because this allows for greater nutrient availability.

Yes, you must include the ppm of the Cal-Mag when making calculations. This is why I stopped using the combination products and began using separate products. I also highly recommend using the EC metric instead of converting to ppm/TDS. IMO more conversions lead to more room to make mistakes.

 

[dramamine]

You flushed with 500 ppm of epsom salts? That's not a good idea, since it really throws off your nutrient ratio and would certainly cause problems. Was this before you saw the problem or after? What EC had you been feeding them?

If you're feeding them that much cal-mag in addition to using tap water, which contains cal and mag....and feeding epsom salts, your nutrient ratios are certainly screwed up. If I were you, I would drop all the extra cal and mag products and just give them balanced nutrition. Then, if you see a slight deficiency, you can add a bit of cal-mag with the next feed, but it's very likely you won't need it, especially with tap water.

 

[OPT]

I too believe it's a humidity issue, this time of year the air is very dry. I believe I remember reading that when leaves cup similar to that, the leaves are trying to conserve there moisture instead of transpire normally.

I'd guess your RH is at 30% or under? It's kinda hard to get it in the right range, but shoot for 70% for vegging at least.

OPT

 

[Meraxes]

I too believe it's a humidity issue, this time of year the air is very dry. I believe I remember reading that when leaves cup similar to that, the leaves are trying to conserve there moisture instead of transpire normally.

I'd guess your RH is at 30% or under? It's kinda hard to get it in the right range, but shoot for 70% for vegging at least.

OPT

yeah humidity is at 60%. i'll try ph 5.8 to 5.9 for a while thanks seamaiden. i'll also cool it with the calmag and epsom until i see something wrong. i'll go ahead and give plain water for a couple days, then hit it with light nutes. very informative all thank you. hope i didnt just murder the poor things....

 

[dramamine]

Hey Meraxes...your humidity is just fine.

 

[Green lung]

Could be soggy medium, low ph

 

[SeaMaiden]

It's not just a matter of humidity, it's a matter of humidity in conjunction with temperatures. VPD.

 

[dansbuds]

Hey Merx , wassup ? I'd say raise your lights to about a foot or more above the girls & make sure your PH @ the time you feed is 5.8 . lay off the calmag & epsom salts unless you see signs of a def . unless your water is a really low PPM or your using RO water calmag is not really needed unless you have calmag hogs for plants in which case it will show up in the leaves . when figuring your feed PPM ... everything is included even your waters PPM to get a final reading .
Good luck dude .... any questions ... just ask .