What's the problem?

Hey guys, I've got a few mothers I'm vegging (well, they are feminized seeds anyway). A blueberry, Afghan Kush, and White Widow.

The Blueberry and Kush look fine, but the WW is in bad shape. Growth rate seems to be ok, if not a little slow, but what has me really stumped is the condition of the fan leaves. They're swollen through the veins, wrinkled, with yellowing towards the outside edges and random splotches of brown as well as a few cracks in the leave here and there.

At first I though bugs... but I haven't seen any concrete evidence of those. The PH has been kept constant between 5.7 and 5.9, nutes are Fox Farm Grow Big at about 500ppm.

The plants are roughly 3 weeks old. grown in an aeroponic system. Roots are all strong and white. My light is a 600w HPS kept about 16 inches away from the plants. It's cold in this grow area so even with the lights running full blast the temp never raises above the low to mid 80's.

Any ideas? Is the plant diseased? Is it salvagable? I wonder if it's nute related but the other two strains growing in the same tub are doing just fine under exactly the same conditions.

What do the pro's think?

How cold are they getting when lights are out? Probably too cold.
Also you are running soil ph levels, you need to fix that and then up the level of nutrients to the proper amount.

You're freezing them and starving them and ph is too high.

looks like a mag def to me..but ive never seen mg def in veg only flower...

OregonMeds said:

How cold are they getting when lights are out? Probably too cold.
Also you are running soil ph levels, you need to fix that and then up the level of nutrients to the proper amount.

You're freezing them and starving them and ph is too high.

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im new to hydro growing but i was always under the immpression that hydro ph is between 5.2 and 6.2...i keep my res at 5.8 and seem to have no problems...i keep my soil at 6.5-6.8

I was also under the impression to keep ph between 5.5 and 6.0 for hydro and higher for soil. Has that changed? I completely agree with the temps being too low... I think it's stunted the growth for sure (they're getting bushy, but not tall). Once we get the PH issue taken care of, how high a ppm should I keep them (at 3 weeks mind you) to keep them healthy?

osujudoman said:

I was also under the impression to keep ph between 5.5 and 6.0 for hydro and higher for soil. Has that changed? I completely agree with the temps being too low... I think it's stunted the growth for sure (they're getting bushy, but not tall). Once we get the PH issue taken care of, how high a ppm should I keep them (at 3 weeks mind you) to keep them healthy?

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keep the ph where it is its fine...hydro ph is lower than soil...low temps will not stunt growth..it will stop growth if the temps drop below 55 but your plants are short and bushy because they are indica dominant strains....as far as the ppm 500 is good for new growth...

Thanks, but if it isn't ph, temps, or nutes.... what the hell is causing the malformations and discoloration?

osujudoman said:

Thanks, but if it isn't ph, temps, or nutes.... what the hell is causing the malformations and discoloration?

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its temps nutes or ph.....im leaning toward nutes and saying you have a mag or cal def...check out the growfaq under plant abuse chart. it will have pictures to compare with for different problems...

Do different strains require different combination/concentration of nutrients? Reason I ask is that all three plants (WW, Blueberry, Kush) all share the same reservoir, same ph, same nutes, same everything. So if the widow is showing bad signs based on one of those variables, why aren't the other two plants?

yes different strains do require different care from time to time...there are also strains that can take mre nutes than others...this might be a case where the widow is needing more or less than the other 2

I'm thinking possibly less for the WW. I grew a few widows about a year ago and conditions were pretty similar... I was using the same nutes but at about half the concentration of what I am now and they did fine and flourished.

What is the typical range (in ppm) for the veg cycle with an aeroponic grow? What is the least/most you'd want to use (as an average of any/all strains)?

Thanks for the help, Nick.

Anyone have anything to add?