help! leaves yellowing

[wavedash]

water temps ~ 73
ph ~ 6.3
no tds pen.
room temp ~ 74
RH ~ 40%

This seedling is in a DWC bucket with a half a cap full of superthrive and some veg nutes @ 1/2 strength. hardly anything imo. the leaves are doing this...

 

[neuroherb]

SOmeone will give you a more in depth. But at that size/age they don't need the nutes so your probably burning them. Clean your res out and use just PH'd water for a few days then maybe a small dose of Superthrive 25% dose in a few days after that. Leave the nutes until there is 5 sets of leafs or until they show signs of an N deficiency.

Your PH is a bit of for hydro as well you want between 5.8 to 6.2, but I find 5.5 to 6.0 works as well.

 

[neuroherb]

By the way your doseage for Superthrive is 1ml to every 5 litres or one gallon. The cap size your on about could be way to much and Superthrive can cooks plants especially seedlings into rigid toothpicks.

 

[HeadyPete]

yes and yes ^^^ Forget the superthrive.

Also the plants are much too small for that hydroton pot setup.

What veg nutes and what dose exactly?

 

[wavedash]

1/2 tsp per gallon of fox farm veg nutes. too small for the pot? possibly but that wouldnt cause this would it? the yellowing leaves have now actually "fallen" off.... going to take pics now..

 

[mexilandrace]

that is nute burn

 

[SDOG]

Veg nutes are no good until the plant is out of the seedling stage. The superthrive is no problem as long as your doing 1 drop per gal.

 

[wavedash]

as of yesterday i drained and cleaned the bucket then added just plain ph addjusted to ~5.7 water. here are pics of the plant today. the ends of the leaves in question literally "fell" off by themselves... the new foilage growth in the middle looks healthy to me though. maybe this sucker will live

 

[neuroherb]

Yea they should survive fine. With hydro a res clean effectively gets rid of over nute situations, soil mixes take a wee bit more work to flush.