Strange leaf curling problem...

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Dicotyledon

Member
*First post*

I was hoping someone could clear this up for me. I have some leafs that are curling up and some that are curling down (on different plants, leaf edges only, not like a canoe.) This is a 12 module undercurrent DWC. Two 600 watt hps about 2.5 feet from canopy in a 3.5x4.5 growing area. (Room is 6x7)

pH is 5.8, water temp is 68, GH 3 Part and CalMag starting from RO water totaling 400 PPM. Plants were clones transplanted 2.5 weeks ago. Air temp is 78-79 degrees, humidity between 45-55 percent.

Growth is vigorous but some leafs look slightly deformed, some leaves have a dark green/light green marbling to them. I've never had seen this before. The strain is White Widow.

I don't currently have the capacity to post pictures... sorry. Any help would be greatly appreciated. :leaf:
 
MoonRaver

MoonRaver

Active Member
Bringing your temp or the water up to 70-72 F will help a lot. You can up your ppm to 700 PPM through out the whole veg cycle. Remember to change and scrub you reservoir once a week.
Here is the feeding schedule for you nutes as well.gen hydro sch.jpg
 
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Dicotyledon

Member
MoonRaver said:
Bringing your temp or the water up to 70-72 F will help a lot. You can up your ppm to 700 PPM through out the whole veg cycle. Remember to change and scrub you reservoir once a week.
Here is the feeding schedule for you nutes as well.View attachment 1811058
Click to expand...
I usually do whole res changes every 9-10 days. Are you saying to bring my air temperature down to 70-72 or raise my water temperature up to 70-72? Sorry a little confused.
 
skiweeds

skiweeds

Active Member
Dicotyledon said:
*First post*

I was hoping someone could clear this up for me. I have some leafs that are curling up and some that are curling down (on different plants, leaf edges only, not like a canoe.) This is a 12 module undercurrent DWC. Two 600 watt hps about 2.5 feet from canopy in a 3.5x4.5 growing area. (Room is 6x7)

pH is 5.8, water temp is 68, GH 3 Part and CalMag starting from RO water totaling 400 PPM. Plants were clones transplanted 2.5 weeks ago. Air temp is 78-79 degrees, humidity between 45-55 percent.

Growth is vigorous but some leafs look slightly deformed, some leaves have a dark green/light green marbling to them. I've never had seen this before. The strain is White Widow.

I don't currently have the capacity to post pictures... sorry. Any help would be greatly appreciated. :leaf:
Click to expand...
sounds like your conditions are fine. i would make sure to go by the feeding chart like the other guy said. never used gh myself. what kind of ph meter are you using? is it calibrated properly? i use the full line of botanicare and get excellent results. also dwc. my water temp is over 80 degrees but im waiting on a chiller. i've read 68 for best results but i think thats just to prevent root rot. maybe it would be better to turn up a bit.
 
D

Dicotyledon

Member
skiweeds said:
sounds like your conditions are fine. i would make sure to go by the feeding chart like the other guy said. never used gh myself. what kind of ph meter are you using? is it calibrated properly? i use the full line of botanicare and get excellent results. also dwc. my water temp is over 80 degrees but im waiting on a chiller. i've read 68 for best results but i think thats just to prevent root rot. maybe it would be better to turn up a bit.
Click to expand...
I have a bluelab guardian that I calibrated a few weeks ago. The idea behind lower water temperatures is to get more dissolved oxygen to the root zone. If I could get my water temp down to 65 I would. I use the normal GH 3-part ratio for transitional phase. I also use 6 ml/g of calmag.

Appreciate the responses so far, thanks guys.
 
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