sensi star tree grow in coco (yellowing leaves)

[black_thumb]

iv got 2 sensi star fem going on 8 weeks veg. one of them is showing alot of big fan leaves yellowing while the other has no yellowing and both are getting the same feeding out of the same res of 1300 ppm of maxi bloom and cal-mag.
7 grams mb and 5 ml of cal-mag per gallon of tap.

should i add more mb? i want to keep my feeding simple.

 

[vStagger Leev]

I'd say hit em with some good ol fashin N. that's my 2 cents...Good luck! I love sensi star!! Stagger

 

[Snow Crash]

My Sensi Star is a Nitrogen and Phosphorus Hog. Actually, she's a Hog all the way around.

When she's scrogged out the lower leaves that get less light have a tendency to die off like that on my own plants. I don't think it's really anything to worry about until it starts hitting leaves that are getting direct light. A little more food probably won't hurt her much. I can push my own pheno at 1.6ec through most of life without any issues. She chews up that Nitrogen though and if she doesn't get enough you'll probably find out in the harvest weight.

 

[black_thumb]

snow it seems that the leaves receiving the lest amount of light are yellowing the worst and now my other plants are getting this same effect.

 

[vStagger Leev]

Feed them NITROGEN!!!

 

[black_thumb]

iv upped my feeding to 10 ml cal-mag and 8 grams mb per gallon of water. i hope this will make the fix.

 

[IwannatokeNbone]

actually looks like it could be either cal mag, not both but one of them, prob the mag, your girls actually looked N'd up to me, coco can be coco'ee.

 

[vStagger Leev]

guess i've never seen cal=mag look like tha before, but you could be right! Stagger

 

[black_thumb]

should i stop using the mb and use canna coco a & b?

 

[beanja]

whats your PH?

 

[Snow Crash]

should i stop using the mb and use canna coco a & b?

That's what I'd do. At least until flowering.

 

[black_thumb]

ph is 5.8-6.0

 

[Raedwulf]

What's your tap water like, black thumb (soft/hard/very hard)?

I have very hard tap water - because, I think, Hampshire has mostly limestone bedrock - and I think excessive calcium levels can lock out magnesium.

(Just a thought).

Hopefully the other (more knowledgeable than me) people here can help you out with this. Good luck.

 

[black_thumb]

my tap is only around 100 ppm i have to add cal-mag if i don't my leaves start turning brown.
the yellowing is still on going so im gonna do a flush with sum drip clean other than that i dont know what else to do at this point.

 

[Raedwulf]

Hi black thumb, this one's been on my mind, so been doing a spot of research, and it seems that maxibloom has an NPK of nitrogen 5, phosphorous (p)15, potassium (k)14.

That's a very low ratio of Nitrogen for vegetative growth (excellent for flowering though).

If I were you, I'd switch to a higher nitrogen fertiliser. Check out this guide in the infirmary

https://www.icmag.com/ic/showthread.php?t=11688

(scroll down to the Nitrogen section) - it may be very helpful to you.

Hoping this helps you buddy.