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Help needed.

-65 day veg (I know... had some problems getting going which slowed growth and I want to sort this before flowering))
-Amnesia Haze bag seed
-LED unknown brand. Says 730 watts on label. Seems good quality full spectrum. Photos come out way more purple
-Pro mix hp with some added perlite
-Currently feeding mega crop but only done so twice. Was using root farm but very lightly prior. Last was feed, water, water, feed. When I was using root farm I’d be at half strength every water or every other.
-Water ph’d to 5.8 to 6
-Temp 75-80 day, 65ish night
-RH30 to 50 (tough to maintain as its very dry in the winter)
-Did a slurry test and got 6.7 (truth be told, probably didn’t do the best with this as the “soil” was taken from the top and didn’t have RO water so I just ph’d to 7)
-Haven’t checked run off yet

New growth is light green, seems slow, upper leaves faded between veins. From my reading, seems iron deficiency but could be zinc, suflur or all 3. Plant has also been droopy. Purple on stems. Did a feeding of mega crop which perked it right up for a day but seems on the droop again. Growth excelarated for short time after both feeds with mega crop.

I probably have a lock out due to PH or just not fed enough. Question is do I just up the feeding scheduling and or lower ph going in to 5.5 and continue on or fairer to assume that Iron, zinc and sulfur are in the water already and it’s locked out and I should flush then continue with feed water feed?

Flushing, do I ph to the desired or do I go lower then what I want. After flush is it desired ph going in? Tap water is 8 which I ph to 5.8 to 6 which gives me 6.7 on my shabby slurry test. Maybe I just need to get that down a touch after a flush or is a flush even needed?

Any advise would be great
 
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The plants actually look pretty healthy to me. Mixing more perlite in with Promix HP might not allow for enough hydration depending on how much you water. New growth on well growing plants can start off a light green color but should darken fairly quickly as the leaves grow and mature. When I grow in Promix (for last 30+ years), I mix some compost/manure mix in with the Promix, which helps to supply most of the needed micronutrients, including sulfur, iron, and just about everything needed. I also throw some wood ashes in and a small handfull of slow release fertilizer in the mix to supplement the periods between feedings, which is about every 12 days during vigorous growth. Purple stems is normal as long as it isn't in streaks or veins... a general purpling of the areas where the light hits them isn't uncommon. If you see purple veins on your stems, it is generally the sign of nute lockout or underfeeding, although underfeeding is pretty uncommon, especially indoors using any type of commercial nutes.
 
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The plants actually look pretty healthy to me. Mixing more perlite in with Promix HP might not allow for enough hydration depending on how much you water. New growth on well growing plants can start off a light green color but should darken fairly quickly as the leaves grow and mature. When I grow in Promix (for last 30+ years), I mix some compost/manure mix in with the Promix, which helps to supply most of the needed micronutrients, including sulfur, iron, and just about everything needed. I also throw some wood ashes in and a small handfull of slow release fertilizer in the mix to supplement the periods between feedings, which is about every 12 days during vigorous growth. Purple stems is normal as long as it isn't in streaks or veins... a general purpling of the areas where the light hits them isn't uncommon. If you see purple veins on your stems, it is generally the sign of nute lockout or underfeeding, although underfeeding is pretty uncommon, especially indoors using any type of commercial nutes.

Awesome! I’ll just carry on then. Thx for the help
 
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