1st grow: Yellowing on edges of leaves, help!

[cphil]

After doing some research and reading, I am assuming its a cal/mag deficiency? I am doing my best to use water balanced at 6.3. For the first time, I have added 25% of the recommended dose of nutes and CalMag. I am watering about every 3 days, and my plants are around day 21 above the soil.

Would appreciate some feedback to help!

 

[Carcass]

Your plants aren't really seedlings anymore, should be big enough to handle a bit more nutes,I'd say around 50% strength,or even a little stronger.
They look hungry to me.
Do they really dry out in 3 days in soil? I'm asking because I haven't used fabric pots yet,so maybe that's how they work?
The cracks look like that leaf may have gotten damaged awhile ago,and as the leaf grows,the crack also grows-doesn't look pest or nute related

 

[NuttyProfessor]

Agree with above post

was thinking watering too heavy also , some of the damage on leaves look like nutrient spills , bring the ph up a bit next time to around 6.8 so she can grab some magnesium , other than that you should be grand

 

[NuttyProfessor]

understanding ph is important i always go up and down on ph so my girls can get what they need


hydro left side soil right side , print this chart out

 

[Drivejunky95]

Yea, brown spots at outer parts of leaves is calcium. Magnesium can show lighter colors on the edges of the leaves. Introducing and/or upping cal/mag amount in the mix will help.