So everything has been great so far.
2 top 44 and 1 unknown sativa
~200 watts of CFL on 12/12
day 11 of flower
water every 3-4 days, till soil is bone dry
last nutes I gave were last week
unknown pH
soil mix - MG moisture control, vermiculite, peat moss, earthworm castings, sand, normal potting soil.

is this normal dying of fan leaves during flowering or a deficiency of some sort - i noticed the largest fan leaves turned yellow and spotted from one day to the next.

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I don't smoke but I grow?

looks like mites to me.. look under your leaves

yellowing looks like nitrogen def and brown spots always thought they were start of nute burn but might be mites

i got a few leaves like dat and i aint got mites

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purp man

It looks like a pH issue. You need to know the pH of both the water you are feeding your plants with and the pH of the soil which you can get some indication of either by a soil pH tester or just pH testing the run off from your pot when you water.

When youre in flower it pays not to do that. Keep up a regular watering schedule keeping the soil moist but not wet, and certainly not bone dry even for a short period of time.

I am assuming MG = Miracle Grow?

so update is:

no mites, double checked.
thanks for the advice on the watering, i won't let the soil go dry.
i use my fish tank pH tester to check the water i give the plants - its exactly 7.0.
MG is miracle grow.
I ended up watering them with a heavy dose of nutes, and the leaves responded well. no more dying leaves, so somthing was missing from their diet

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I don't smoke but I grow?

Day 23 Flowering

On a good note:
the plants have stopped growing upwards and are now filling out, with buds developing.

On a bad note:
the leaves are starting to show signs of spotting again. The spots appear from one day to the next, then the leaves start to turn yellow and die. It is happening in lower leaves, and very slowly moving up to the middle leaves. The spotting looks like necrotic spots.

Specifics:
pH of water going in is 6.0 - i give miracle grow nutes every other watering. I water once every 3 days. soil is very well drained and airy. The temps are around 75 F and the humidity has been 65% which i know is high - i have a dehumidifier in there which doesn't help much. I don't think its mold or fungus because i see no signs of anything living on the soil or stems or leaves, just spots out of the blue.

is this some type of deficiency or strange nute burn?

Attached are new pics.

The first is a leaf in midstage death - yellowing but smaller spots.


The next is a leaf in late stage death - not as yellow but larger spots.


The last one has a backlight so you can see through the leaf, showing the small spots on a healthy leaf.

Attached Images

	IMG_9647.jpg (371.5 KB, 221 views)
	IMG_9648.jpg (376.6 KB, 219 views)
	IMG_9658.jpg (81.1 KB, 217 views)

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I don't smoke but I grow?

In soil you want your pH to be 6.5 else phosporous, calcium and magnesium will become unavailable to your plant.

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Theres no business like Grow business.

so you think this is the problem?

with nutes the pH goes to 6.0
without nutes, plain tap water after sitting is 7.0

should i give them half nuted water every time, so the pH is 6.5?

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I don't smoke but I grow?

If you can get some pH up that would be better or else half strength and since your feeding every other watering, try feeding every water. If you see nute burn then back off to every other.

But first things first youre going to need to flush your pot with pH balanced water till it runs 6.5 out the bottom. If you havent done this before heres a little vid I found that has someone doing just that.
http://www.ganjaguerrilla.net/calendar.html
Download the link that says, "PH & Flushing streaming video".

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Theres no business like Grow business.