What is this plant asking for?

[shovelhead]

I have 2 plants in a small cabinet,150HPS,Miracle Gro Organic soil/perlite,fed with Fox Farms Tiger bloom and Big Bud. The plant on the left is possibly a grapefruit,the one on the right is supposed to be White lightning. The White lightning is starting to brown/yellow the top leaves and you can see it working its way down. The grapefruit is unaffected. They are about 37 days into flower,I have not grown either strain indoors before so I'm not sure how long they need to finish. I'm assuming at least 2 more weeks. These plants were severely infected by spider mites during veg,no sign of the little bastards now.





This last pic was from the invasion,thanks to you all they've come a long way.

 

[Core]

what is your soils ph at.....i think its ph issue.....that or Mg truobles

EDIT:this is a guess ...i wanted you 2 know...

 

[Guest]

def looks like a PH problem. What is your PH?

 

[sproutco]

Calcium trouble.

 

[sproutco]

 

[kindroyale]

the coloration is a byproduct of the spider mites. that's what happens... i had a mite prob not long ago, and all of mine looked identical to those, but my strains were blueberry and trainwreck...

if the mites are dead, don't worry about the leaves... most of them will die, just concentrate on new growth.

 

[Grat3fulh3ad]

Looks as though it may be a Mg problem, to me...
Factors that can cause Mg issues...
Low soil Mg content
Low ph
High available Mn (manganese)
High available K (potassium)
High available Ca (Calcium)

Do the tiger bloom or big bud contain any Mg?
The yellowing is most likely not the result of the spider mites.
The Speckles are, but not the yellowing.

 

[sproutco]

Do the tiger bloom or big bud contain any Mg?
.

Both do. Both don't contain calcium though.

 

[sproutco]

There may also be zinc trouble from using too much phosphorus.

How much of each fert per gallon are you using? What's your recipe?

 

[Guest]

yeah I dont see it being mites turning it yellow either...top it does look like a Mag problem but the last pics look like PH....

 

[sproutco]

Mag def happens on bottom leaves.

 

[Guest]

Im gonna say its a mix of ph and a mag def. Whats you ph?

 

[shovelhead]

.

.

Sorry to say I don't know the ph,have not invested in tester yet. I didn't mean to confuse anyone but the last picture is from early Sept.,during the spider mite invasion,I wanted you all to see how bad they were before. I got rid of the mites and let them veg/recover until Dec. 1,after which the lights were switched to 12/12. They've been doing ok since,but I have to rule out that the leaves are discolored because of the mites,this just started. Assuming the ph is ok,[I know I shouldn't,but],and it is a mag def.,a little epsom salt in water? Tiger Bloom and Big Bloom[sorry not Big Bud like I said before] both contain magnesium according to the labels.
Or am I over worrying,just ride it out until harvest,which I don't think is too far away.

 

[TNTBudSticker]

Check PH

Or get some distilled water

Check for mites..if not..then its PH

not PH ?

It must been when you started to use flowering ferts too soon..let the plant flowering itself rather than forcefeed it into flower...that what happens to the leaves during the latter growth phrase of flowering...just cause its 12/12 doesnt mean use flowering ferts.... maybe use the flowering ferts after the 3rd week in flowering or use less of it BUT mix it with some nitrogen veg ferts too.