Please Help! Seedlings issue

TampaBound

Active Member

• Jan 14, 2009

• #1

Hello, I have 2 (2 week old) seedlings in rockwool cubes, white widow and AK-47 that are both displaying a their bottom leaves as yellow.

This is the AK-47, the Widow isn't this bad..

The P.H of the water being used is 6.5, is this ok?

It is just these two seedlings under a 400w MH in a grow tent, in a humidity dome (75%) 81F

No nutes given yet, what do you think could be causing this?

 

TampaBound

Active Member

• Jan 14, 2009

• #2

is it possible they are getting TOO many lumens?

 

nunof

Well-Known Member

• Jan 14, 2009

• #3

Drop your ph to 5.8-6.0....and you can't over light your plants.....heat yes...but not light.

 

TampaBound

Active Member

• Jan 14, 2009

• #4

Ok, PH to 5.7 - 6.0 What about the size of these, they are exactly two weeks old, planted at midnight on new years. Is the Ak-47 looking good size wise? The widow is ever so slightly bigger. I really appreciate any advice. Sorry the pic looks like crap, had to take with my phone.

 

TampaBound

Active Member

• Jan 14, 2009

• #5

Also, what temp should the water be if your using a bubbler? These are not in a system yet, but are going into a bubbler dwc. Is the temp of the water very critical?

 

TampaBound

Active Member

• Jan 14, 2009

• #6

I asked too many questions? =(

 

indianaman

New Member

• Jan 14, 2009

• #7

2 weeks? do you have like one CFL in a dixie cup?

 

TampaBound

Active Member

• Jan 14, 2009

• #8

thats what i don't get.. it took 3 days to germ, so technically they have been under light for 11 days, the first 7 of those 11 they were under a 62w CFL, and the past 5 days it has been under 400w MH

 

indianaman

New Member

• Jan 14, 2009

• #9

looks like you toasted it with the halide. are your plants on top of oranges???

 

TampaBound

Active Member

• Jan 15, 2009

• #10

wow.. is this really all the help the community has to offer? Even provided a picture..

=(

 

Moldy

Well-Known Member

• Jan 15, 2009

• #11

I'm a dirt guy so I can't help much but my seedlings were doing that crap too. Also they were under a 400W MH but at about 4' away. After I transplanted them new growth began and the yellow lower leaves fell off. Someday I'll try Hydro but been in dirt for years, hard to change.

 

TampaBound

Active Member

• Jan 15, 2009

• #12

Thanks, that helps the optimistic meter. I guess maybe the heat from the light did it, even though it never exceeded 81F..

 

NewGrowth

Well-Known Member

• Jan 15, 2009

• #13

Ph is too high and the rockwool is over saturated. Remove the humidity dome as well.

 

closetkiller

Well-Known Member

• Jan 15, 2009

• #14

To much water. let the rock wool almost dry out. then manually water until your roots grow out of your pot. i did the same thing. my other 1 took off like crazy. i use a 400w agrosun gold bulb. kept it 30" for the first 2 weeks then moved it to 18"-24".

 

TampaBound

Active Member

• Jan 15, 2009

• #15

Roots are already at the bottom of the pots/rocks. I put in a bubbler last night, hopefully I wont have to worry about this anymore as the DWC Bubbler will water the roots continuously. Thank you all for your responses.

 

closetkiller

Well-Known Member

• Jan 15, 2009

• #16

good luck.