plant probloma help please.

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rob1258

New Member
hi

i am growing a big bang auto and am having some trouble withy plant as it is starting to go yelloq and growing slow.

its under a 250w hps lamp
groqing in a peat type soil
watering with normal water every other day when the soil drys out. i am not feedinh any nutes.
 

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Dankfactory

Dankfactory

Well-Known Member
Need some more parameters than just what you've provided.. What brand of soil.How close is your lamp. What's the temp in your environment. Are you pHing and checking pH of your water. If you're using tap, do you have a water softener( if using tap , it's only advisable to use hard water tap, as its high in Ca and Mg).Few other pertinent params, but I'd start there.
 
nameno

nameno

Well-Known Member
It's an auto,the way I understand it is the plant decides when it will flower? Is this not correct? Sure looks like nute burn to me.
 
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rob1258

New Member
nameno said:
It's an auto,the way I understand it is the plant decides when it will flower? Is this not correct? Sure looks like nute burn to me.[/QUOTE

that is exactly what i thourght. but how can i be nute burn i do not use any nutes and how do i cure that iif it is?
thanks
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Dankfactory

Dankfactory

Well-Known Member
rob1258 said:
nameno said:
It's an auto,the way I understand it is the plant decides when it will flower? Is this not correct? Sure looks like nute burn to me.[/QUOTE

that is exactly what i thourght. but how can i be nute burn i do not use any nutes and how do i cure that iif it is?
thanks
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It isn't nute burn. Before the plant displays burnt tips/edges, the N absorption skyrockets.You would have dark, waxy leaves with burnt edges.
If your pH is off it can lock the plant out however, inhibiting nutrient uptake.
The soil you're using also looks a little suspect from the pics. What brand, and what's the pH of your feed water for starters?
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rob1258

New Member
thanks for the reply dankfactory its a cheap soil and peat mix i bourght and i took ph run off from plants and it was aroind 7.5 so i added bit of vinigar to my water till i got the water to 5.0
 
Dankfactory

Dankfactory

Well-Known Member
rob1258 said:
thanks for the reply dankfactory its a cheap soil and peat mix i bourght and i took ph run off from plants and it was aroind 7.5 so i added bit of vinigar to my water till i got the water to 5.0
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7.5 is too high, 6.5-6.8 is ideal,5 is too low for dirt. I wouldn't try feeding until they bounce back from the alkaline water. You should notice them start to be able to utilize the avail nutrients within the soil after a couple of waterings( about a week.)They're prob just locked out. In the future I'd switch to a better soil, always pH, and ditch the Autos altogether. The same quick flower turn around can be manipulated by simply flipping them 12/12 early, and the bud quality from reg seeds will be superior to Autos.
 
Dankfactory

Dankfactory

Well-Known Member
rob1258 said:
Thanks for the advice. so is that what is yellowing my plant.
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Since your waters coming in at 7.5 , its more than enough to cause lockout and is the likely culprit. Once your pH creeps into that range the plant stops absorbing nutrients, causing all kinds of issues/ deficiencies. Some strains are more sensitive to pH than others. Dropping it down to 5 isn't doing yourself any favors either. It'll take a bit to recover. Just water as normal with plain water ph'd to 6.5. It looks like there's still hope for recovery.
 
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