Seedling leaves turning light green

J

jakamini

Active Member
Seedling is in an 8 gallon bucket in rdwc being top fed 4 times a day 15 minutes each feeding. Water reservoir is a ph 5.6 at 65 degrees F. Tent is 75 degrees F humidity between 40-50. Leaves have been getting lighter as the plant is growing. Ppm is at 480 using GH flora series. Any suggestions to darken leaf color or is it looking ok thanks
 

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Your pH is a little low, I'd shoot for no lower than 5.8. There's some chlorosis on new leaves, which could mean your ratios are off, or that it's time to increase PPMs. Your PPM reading is telling you the total of all three GH products in dilution, but not the ratios to each other. How many mL of each are you adding to get your 480 PPM?
 
simpleleaf said:
Your pH is a little low, I'd shoot for no lower than 5.8. There's some chlorosis on new leaves, which could mean your ratios are off, or that it's time to increase PPMs. Your PPM reading is telling you the total of all three GH products in dilution, but not the ratios to each other. How many mL of each are you adding to get your 480 PPM?
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Thanks for the reply. Started at 15mL of gro micro and bloom. I added another 10 ml of each two days ago thinking it needs more. Between the reservoir and grow bucket there is 13 gallons of water. I was waiting until it grew a little more to bump up the feeding schedule to mild veg which would be 65 mL of each and would also add in pro silicate.
 
simpleleaf said:
Your pH is a little low, I'd shoot for no lower than 5.8. There's some chlorosis on new leaves, which could mean your ratios are off, or that it's time to increase PPMs. Your PPM reading is telling you the total of all three GH products in dilution, but not the ratios to each other. How many mL of each are you adding to get your 480 PPM?
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simpleleaf said:
I think you're on the right track, increasing PPMs. Good luck!
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Thanks I’ll bump up ppms another 10 ml each and raise the ph. Appreciate the help
 
Ok I added 25 mL of each flora series Thursday night and the PH is 5.78. I have not seen any improvement. Should I wait a couple more days? Should I change out the reservoir with fresh water/nutrients? Thanks for any info
 
The first pic I can see the green in the center of the leaves,it should be working its way out to the edges.Is it?
 
The white on the pebbles is from the ring sprayer top feeding my plants. The green is not really making its way out as far as I can see. If it has moved out it’s minimal. I’m new to this so not sure how long it takes a plant to recover.
 
jakamini said:
The white on the pebbles is from the ring sprayer top feeding my plants. The green is not really making its way out as far as I can see. If it has moved out it’s minimal. I’m new to this so not sure how long it takes a plant to recover.
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You should see it daily getting greener.You dont need a sprayer on top just a 1/4" line is fine.Spraying your hard water is causing the Ca to build up.
 
You also need a ppm/EC meter,you can tell how strong your water is and your solution.Dont need an expensive one.
 
Don't get hung up on dialing in the pH, almost all macro and micro nutrients are available at a pretty wide range (5.5-6.5). My guess would be the seedlings haven;t fully taken to the DWC so they are only getting nutrients from the top feed, in which case they are not getting enough so you are seeing nutrient deficiencies. I would leave it for another week and not change anything, the plant will adapt and develop a root system that can access the nutrients available in the DWC reservoir.
 
PKLIP said:
Don't get hung up on dialing in the pH, almost all macro and micro nutrients are available at a pretty wide range (5.5-6.5). My guess would be the seedlings haven;t fully taken to the DWC so they are only getting nutrients from the top feed, in which case they are not getting enough so you are seeing nutrient deficiencies. I would leave it for another week and not change anything, the plant will adapt and develop a root system that can access the nutrients available in the DWC reservoir.
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Yes the roots have not reached the water in the bucket yet. I am feeding 4 times a day for 15 minute cycles. Do you think this is enough or should I bump up the feeding to 6 times a day.
 
jakamini said:
Yes the roots have not reached the water in the bucket yet. I am feeding 4 times a day for 15 minute cycles. Do you think this is enough or should I bump up the feeding to 6 times a day.
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Wait what? RDWC pump runs 24/7 ! water level should be just below net pot,airstone bubbles burst and keep the net pot moist.
Im not sure what the hell your doing.
 
myke said:
Wait what? RDWC pump runs 24/7 ! water level should be just below net pot,airstone bubbles burst and keep the net pot moist.
Im not sure what the hell your doing.
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The rdwc is running 24/7. The top feed is on a timer so the water pump does not heat up the reservoir
 
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