Anyone know what this yellowing of my seedlings is due to?

benjamin alexander

Active Member
Hey i may be able to provide a little more insight and compare some things with you, i've got two pc and three lsd seedlings at about the same stage as yours, one lsd is lush dark green, has been from day one, two are yellow-green, they sprouted this way with very sativa horn leaves. One pc is freaky, purple and green with almost round leaves, the other is definately sativa, node spacing and leaves give it away but they came out yellow, first set is now only yellow at the tips, one tip goes up, the other goes down lol and the second and third sets literally have pineapple colours, dark green and green yellow but are healthy as. I had them germed in rockwool and placed into small 10cm pots like yours filled out with coco and perlite and my root system was crazy in a week, could have been the rhizotonic but the pot was filled out! So now they are in slightly bigger pots to see what happens but they've taken off now so not sure if the root growth is genetics or good growing but i've never had such a staggered root to foliage ratio before these strains. As for the colors, it isn't a def of any sort in my case, had purified rain water, rhizo, calmag and dutch master ab up to 200 ppm from a base of 40 from my rain water phd to 5.5-5.7. They are growing madly but from what i've read the genetics can be unstable and a few lsd grows have commented on the horn leaves and yellowing in the seedling stage indicating the killer sativa pheno and as more sets appear they do so greener and greener. But compared to my color variations and freaky growth you have nothing to worry about, i'm not about mine and their a freak show lol it's genetics i think
 

Robert Paulson

Active Member
ph is way too high.

Your locking out Nitrogen.

Yellowing = deficiency.

Fix your ph and they'll be fine.


PS edit.

The PH of the runoff is typically higher than the PH of the water you add.

Test the ph of the run off, subtract the difference from the ph of your water. Adjust your water ph so runoff is optimal levels.

7.0 is ridiculously high for soil. You need to be at 5.5-6.0
NO NO NO NO NO. 6.5-7.0 for soil. You've done everything right so far. let them get used to there new pots before feeding them anything and i don't think you will be having any more problems. edit...that's not to say you have a problem now, they look completely fine.
 
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