Journal grower needs help identifying problem

Adam75 · #1 (**permalink**) 02-12-2007, 06:05 AM

So last week was hard on my plants, I didn't show them too much love, and I'm sorry for it now. Please help me identify this problem. I have white spots on my leaves. I've taken a few good pictures so people could help me figure it out. Is it from the bad pH (got up to like 6.4 or something like that)? Is it more Mag problems (had some before)? I see the nute burn on some of the plant tips, could this be nute burn too? Check out the link to my journal below. Basic Details: DWC/Aeroponic setup, mix of White Widow and Big Bud. pH at 5.8 (now) and TDS at 1000 ppm (now). Using the GH three pack and some epsom salts. I Just sprayed it with a foliar spray of Flora Shield at a 1/100 mix and I didn't see spots before...now I do? Room temps stay at or below 80 F day and 65-70 F at night with a RH between 40-55%. Ok so any ideas?

Ganja Guerrilla · #2 (**permalink**) 02-12-2007, 06:51 AM

foliar spraying must be done with the lites OFF. water spots magnify the lite and burn the leaves

the PH that was off will also cause spotting

Slypknow · #3 (**permalink**) 02-12-2007, 07:53 PM

Interesting as I noticed you said you pretty much neglected your plants for a week and now this.

Usually when I run a DWC and I top off, set the pH and make sure my nutes are 1400ppm... if I leave the plants for a week the pH will actually DROP, the nutes will become stronger and the water will be lowered (from transpiration).

However, you left your alone for a week and your pH went up... this would seem odd to me unless you are not using strong enough nutes in your rez. Meaning your plants are using less water/more nutes.

This changes how I would diagnose this issue from your plants burning to your plants having a deficiency.

To correct this I'd get your TDS back to 1400ppm (.7 conversion), pH around 5.8 (having this amount of nutes, you shouldnt need to mess with pH down) and STOP SPRAYING! Foliage sprays are a waste of time, causes light burn and basically just gives a grower the 'feeling' they are helping. Let your plants use the nutes you give em in the tub and forget the sprays.

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#1 (permalink) 02-12-2007, 06:05 AM
Adam75 Mr. Greenson Join Date: Oct 2006 Posts: 122	Journal grower needs help identifying problem So last week was hard on my plants, I didn't show them too much love, and I'm sorry for it now. Please help me identify this problem. I have white spots on my leaves. I've taken a few good pictures so people could help me figure it out. Is it from the bad pH (got up to like 6.4 or something like that)? Is it more Mag problems (had some before)? I see the nute burn on some of the plant tips, could this be nute burn too? Check out the link to my journal below. Basic Details: DWC/Aeroponic setup, mix of White Widow and Big Bud. pH at 5.8 (now) and TDS at 1000 ppm (now). Using the GH three pack and some epsom salts. I Just sprayed it with a foliar spray of Flora Shield at a 1/100 mix and I didn't see spots before...now I do? Room temps stay at or below 80 F day and 65-70 F at night with a RH between 40-55%. Ok so any ideas?

#2 (permalink) 02-12-2007, 06:51 AM
Ganja Guerrilla www.ganjaguerrilla.net Join Date: Jul 2006 Posts: 2,822	foliar spraying must be done with the lites OFF. water spots magnify the lite and burn the leaves the PH that was off will also cause spotting

#3 (permalink) 02-12-2007, 07:53 PM
Slypknow Registered User Join Date: Apr 2006 Posts: 67	Interesting as I noticed you said you pretty much neglected your plants for a week and now this. Usually when I run a DWC and I top off, set the pH and make sure my nutes are 1400ppm... if I leave the plants for a week the pH will actually DROP, the nutes will become stronger and the water will be lowered (from transpiration). However, you left your alone for a week and your pH went up... this would seem odd to me unless you are not using strong enough nutes in your rez. Meaning your plants are using less water/more nutes. This changes how I would diagnose this issue from your plants burning to your plants having a deficiency. To correct this I'd get your TDS back to 1400ppm (.7 conversion), pH around 5.8 (having this amount of nutes, you shouldnt need to mess with pH down) and STOP SPRAYING! Foliage sprays are a waste of time, causes light burn and basically just gives a grower the 'feeling' they are helping. Let your plants use the nutes you give em in the tub and forget the sprays.

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