Pale green/yellow seedlings :( only 7 days old

G

Greenkace

Member
Hey there fellow ents,
I have some sweet tooth babies growin in a 4x8 ebb and flow table. 7 days in the table so far. I put them in 8" pots when I saw roots growing through the bottom of the rockwool cubes (too early?). I feed them on a timer 2x/day. It takes 30 minutes to fill to about an inch below the rockwool, it then takes about 20 minutes to drain. I used the seedling amount of food from house and garden chart (after adding to my 100 ppm well water it came to 300ppm). Two of them are now a pale green with the first set of beginning leaves turning yellow. It looks like nitrogen deficiency but arnt they too young for that? I was gonna add more food but I'm afraid too. I read that seedlings need 200-300ppm but I've seen people talk about using up to 900ppm (wtf??). I'm due for a nute change (or shouldnt i bc they are so young), should I boost the food? They aren't out of seedling stage yet (don't have any full 7-9-11 leaf set yet)
Any help would be great,
Thanks
Gk
 
GermiNATE B

GermiNATE B

Active Member
I'd say to let the plants establish themselves a little more before any nutrients whatsoever.. They are so young and frail at this point that I'd play it safe.. My thoughts, others may disagree.
 
namtih024

namtih024

Active Member
im a bad speller so overlook it, well its prob not a nutrient deficency. sounds like the begining of a burn. flush with plain well water with a balanced ph. whats your ph level at it should be between 5.4 and 6.0 in hydro depending on the plant, most strains i grow do well at 5.8
your using well water, good, but you don't need as many nutrients when you use well water because it already has some readily available nutrients, giving it too much nutes will cause it to burn, if the yellowing continues into browing curling leaf tip then you definitely have a burn.
deficencies will manifest themselves as a gradual change. sudden changes indicate a burn or imbalance in ph levels. are your leaves kinda thick and tough or are they soft a thick turgid leaf is the sign of nutrient overdose.
what are you using in the pots, hydroton or rockwool or something else, the grow medium directly corresponds to the watering cycles, i cant tell you if your watering it too much or too little without knowing what you have them growing in.
i reccomend giving them nothing but pain water with adjusted ph levels for at least three days. wait to give them more nutrients until you see new green growth growing at a decent rate.
whatever you do dont give them more nutes just yet.
you may also check for pest like thrips which can cause yellowing.
pics would also help.
hopefully you can bring them back before they are too far gone, if they seem too stressed its best to start over, a stressed plant never gets as big as it could have been.
good luck post pics and hopefully you get to smoke pounds of sweet sticky sweet tooth
 
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