Problems with lower leaves dying off..

[Markass]

for the past couple of weeks my plants have had about 4 or 5 lower leaves turn yellow and die off...I was at first thinking nutrient problem, but my leaves aren't really showing unhealthy signs, it's just that a couple of leaves die from here to there. Is this normal? I've included a few pictures, quality isn't too great, but maybe you can tell me if this is a bad problem or not? It's not seeming to affect the rest of the plants, it's only happening to some of the lower leaves, and new growth is fine; preflowers are showing on one plant :)

I know that's a lot, but bottom line, is this a problem that's serious, or is this something that happens?

[BlueBear]

What week are they in? If in flower it is fine, if in veg beef up the nitrogen it is most likely a deficiency.
Adieu

[Markass]

I'd say around five or six...No flower yet, still vegging. I did read a bit and was thinking maybe nitrogen def...It's been nearly a week since last nutrient(miracle grow 15-30-15...But I indeed do have purple stems on three or so of the older nodes. The newest one stems are turning nice and green. But yeah, do you think it's worth a try giving them a bit of nutes and seeing if any improvement comes from it?

[BlueBear]

Yes, I think that it is worth it. That MG has time release properties that don't allow all of the nutes out until they hit a particular temp.
Adieu

[invision]

that MG is for flowering you need high N like 10-0-0 you have a high P which is the center number it will not do what you want it too get some high N and it will solve your problem

[BlueBear]

You can get a 6-3-8 or something like that too, I learned that some veg nutes aren't always highest in N, but I like to have a high N property just so I don't have a nitro prob myself, but yah what Envision said as well should do you.
Adieu

[BlueBear]

See if the local garden store has a bottle of Alaska fish ferts for veg. I wouldn't use the flower IMO, high traces of arsenic, yuck. Don't trip many organic ferts have the same thing, just different amounts.
Adieu

[Markass]

Thanks for the advice guys, and I'm watching it hoping for some signs of improvement on the deficiency..Still continuing growth.

I was kinda wondering what one is to look at when determining when to go to 12/12...Is there a certain height or anything?

[Markass]

Here's some new pictures..quality isn't wonderful, but you can see them.