purple stems rapidly yellowing leaves

circle ting

Active Member

• Apr 8, 2013

• #1

ive been growing 2 big buddha cheese plants 1 mazar kush and a jack herrer critical auto 1 of my bid buddha cheese plants is rapidly going yellow on the top leaves it started at the bottom then recovered but then spread to the top does anyone know how to fix this problem?

 

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*BUDS

Well-Known Member

• Apr 8, 2013

• #2

Feed them veg nutes and make sure the ph is right.

 

circle ting

Active Member

• Apr 8, 2013

• #3

ive been puttin 1.5ml a litre i have only just today been told to up them to 4ml a litre so i have done so i look at the bottom of my pot and theres some white crystals near the drainage holes is this salt build up?

 

F

Fresh 2 De@th

Well-Known Member

• Apr 8, 2013

• #4

from the pics i can tell you your issues, but can't tell you why it's happening without knowing your medium and readings from your runoff.

 

circle ting

Active Member

• Apr 8, 2013

• #5

my medium is Coco canna plus professional my run off i only have ph droplets to test it and could you explain whats happening to my plant?

 

F

Fresh 2 De@th

Well-Known Member

• Apr 8, 2013

• #6

ok, the only way to could get a ph reading is to sit a clump of the coco in distilled water in 30 mins and then test it.
from your pics, you definitely have a cal/mag and phosphorous issue. without readings of at least ppms from runoff, i don't know if it's a lockout or deficiency. are you using any cal/mag with your feed regime?

 

circle ting

Active Member

• Apr 8, 2013

• #7

no i use tap water and canna coco a+b people have told me it has enough cal and mag in it but im not so sure.... any help?

 

F

Fresh 2 De@th

Well-Known Member

• Apr 8, 2013

• #8

circle ting said:

no i use tap water and canna coco a+b people have told me it has enough cal and mag in it but im not so sure.... any help?

Click to expand...

well, the best i can tell you is to give the plant exactly what it wants when it wants it. people used to tell me that i didn't need any cal/mag while using gh 3 part, but guess what, the plants told me i needed and they got it.
on another note, what are your rh and temp readings?

 

circle ting

Active Member

• Apr 8, 2013

• #9

rh? my temp is 30 degree's the drop goes to about 24 with lights off and would you reccomend me buying a bottle of cal-mag to deal with this then?

 

F

Fresh 2 De@th

Well-Known Member

• Apr 8, 2013

• #10

tbh, 30 degree's is very low, especially in veg. if anything, you should try to get your environment dialed before you try anything else at this moment in time.
basically in veg you want your temps high 60's to mid 70's and rh around 50-60. if you don't know what your relative humidity is, get a hygrometer from you local hydro store.