Seedling issue with rockwool (P deff?)

[UberPooner]

Im starting a 100% rockwool grow and started getting some issues after a couple nodes.

they are looking over watered and or phosphorous deficiency(front leaf on left plant).

Also leafs are not as big as I thought they would be, should they be bigger?

Ph - 5.6
ppm(.5) - 260
nutes - dutch master one
water - ro
OG microbe tea

Once I saw roots on the 4x3 cube I put them on top of a net pot filled with rockwool chunks/cubes.

I water/feed every 2 days, they feel pretty dry by then. Thats why im confused at the over water look. Im thinking nute deficiency because I have not seen one sign of burn though signs of deficiency.

What do you think?



Thanks

 

[mojave green]

They're fine.

 

[UberPooner]

@mojave green thanks for input, that kinda put me in check about worrying for no big issue.

They are both doing fine now however the plant on left is still kinda weird compared to left. i.e. thick leaves like over watering and smaller growth of leaves.

Right plant had issues starting out now its doing much better than Left.

I want to know what anyone thinks affected that leaf with the necrotic spots circled in red(thats what i think they are) and the super yellowing of the first single leafs(its not like that on the Right plant).

Here is a pic of the Left plant, then a top view of both:




Let me know what you think, thanks!

 

[soil margin]

Doesn't really look like necrosis to me. Seems like just a few burn spots on that leaf and a yellow leaf or two. Maybe it got too close to the light, too hot,etc. Plants look pretty healthy to me. It could be a number of different things that caused those spots and none of them would be particularly serious.

 

[UberPooner]

thanks for info @soil margin, I guess it could be nuteburn from early stages. I didnt think it was because I dont see any tips of other growth that are effected. Also im growing a new seedling in soil and am getting those spots even without feed. Could an insect do this?

 

[tizyite]

hello! I have been having similar issues with seedlings. I have found that watering every 2 days is the problem. The ph of your medium is changing. Rockwool needs a more continues wet/dry cycle to maintain ph levels. get a drip line and a timer and the plants will grow like crazy.

 

[corky1968]

As long as the new leaves look fine ignore it.