New Grower autoflower leaf tips yellowing

[giz1990]

hi i am new to this my autos are 3 weeks old today and new leaves at the top of the plant have started yellowing at the tips also the same has happening with the lower leaves they are biobizz all mix soil soil and are 3 weeks old growing under 250w cfl closet grow they look healthy as far as i can tell do they bneed feeding or isit nute burn any help much appreciated thanks heres some pics aswell

 

[Hipster2U]

check your soil pH first.

 

[Coldharbour]

I've had similar problems with biobizz allmix soil - although i was feeding them tap water which was chlorinated (that didnt help).
I'll be using biobizz light mix next time round.

I would recommend asking for help in the new growers forum - they're extremely helpful in there and will notice your post much faster.

Good luck

 

[Muddy]

It looks like a little nute burn to me. Have you feed them anything yet?

 

[giz1990]

leaf tips on my autos going yellow help!!!

hi my autos are 3 weeks 2 days old im using biobizz all mix soil closet grow 250w cfl red spectrum with reflector since about 5 days ago i noticed that the new leaf tips at the top of the plant are yellow and i just noticed yesterday that the lower older leaves tips are starting to do the same they was fine up untill now i think that the plant might have used up all the nutes in the soil and is hungry or there's to much for them so i have flushed the soil to rid of any toxins and just got some biobizz bloom to add next watering any tips will be great here is some pics

 

[Coldharbour]

Hello again mate

Muddy and others replied to you yesterday on your original thread

https://www.autoflower.org/f16/autoflower-leaf-tips-yellowing-6767.html#post126644

Would advise to post in the new growers forum for fast answers.

Good luck

 

[Red eyed c]

At 3 weeks old the plants will probably require grow nutes.one thing that been discussed on the forum is that people have found that feeding grow nutes through to week 5-6,or until vertical growth stop works better.the plant requires the nitrogen

 

[giz1990]

how would i check my soil ph the run off water is it and no no feed yet just what was in the soil i flushed them last night to rid of any toxins now i just bought bio bloom and grow hopefully to use next watering see if flushing has improved the leaves first im using tap water as-well what would the best water be or should i use tap water but boil it first or leave it stand for 24hours cheers guys

 

[astronomy420a]

if your tap water has chlorine in it let it stand 24 hrs. to dissapate the chlorine, in open top containers

 

[giz1990]

well they have just shown they're sex both female and i just picked up biogrow and bloom should i use them both or just the 1 thanks mate