white tip and brown spots within yellowing

bljeep90

Member
i think its either too much chlorine, been using tap water lately. or it could be a zinc problem.

I would like to have a professional opinion though.

first pic shows brown spots and yellowing

2nd pic shows the white tip.

Setup:
-4 27w 5000k cfls
-1 23w 2700k cfl
-rockwool medium
-using schultz 10-15-10 at 1/8 strength every other watering
-pre mixed solution is at 6 pH
 

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Sealion

Active Member
Don't water as often make the roots stretch. Start using distilled or r/o'ed water. You don't need to be applying base nutes yet. Try using a root stimulator or beneficial bacteria. PH 5.2-5.8 is preferable.
 

statik

Well-Known Member
You are in rockwool try lowering your ph a bit. I think 5.5 - 5.8 is ideal for rockwool. Double check that though. How old are these?

EDIT: ^^ What Sealion said..yeah..that. lol
 

maxpesh

Active Member
have a look at this page http://www.marijuana-seeds.net/Thanks-ThankYou.htm Also the others are correct the Ph must be at 5.8 for rockwool or coco or hydro and aero. Once a week feed with the Ph at 5.5 so the plant can take in a bit of Manganese. If the Ph in rockwool goes over 6 then the plants will not recieve any Calcium ,Manganese Iron or Boron
 

statik

Well-Known Member
i just flushed it with a ton of 5.5 pH distilled water. about 2 gallons worth
Two gallons may have been a bit much, but ok. Let them suckers dry out now.

Next time before you start (new seeds/clones), soak your rock wool in 5.5 water for a while. It will help condition them and you will have less ph swing.

Remember reading that somewhere.
 

bljeep90

Member
yeah i soaked it in 5.5pH for a day before planting but i havnt been usin ph'ed water whenever i watered it
 
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