Super Problems

Ok, so my last grow was nearly ruined due to a pretty bad salt buildup so I had to get a new drip system. Well what I didn't get was a new pump, and I think that's what the problem is. The Super Skunk has been flowering for 23 days now, which is about the time I began to see problems with previous plants (I have a bubbler for mothers and the drip is used for flowering plants), and the symptoms are similiar. They include yellowing of the leaves starting from the bottome up, all of the leaves are losing their green color, the tips of the leaves are burnt and curling up slightly, and all of the leaves eventually die completely. I think that the problem is leftover salt in the old pump that I had been using. Sunday I changed the pump, ran Clearex in the reservoir for 30-40 minutes, and changed the water. I'm using Fox Farm Big Bud, and Tiger Bloom at the recommended amounts. I know that's a lot of info, just let me know if you need anymore. Pics attached. Will the plant recover and if this continues what might the problem be?

BTW pH is good, and water temps in the res. are good. 400 watt MH and 75 watt HPS are the lights being used. Grow room temps high=75 low=60, humidity between 40-50%.

Here are some better pics of the leaves, and one of the stem. Although I've had plants with stems that looked much worse than this one and not had any problems.

As the plant matures, you're going to start seeing your leaves turning yellow and looking like hell anyway; the plant is giving it's life force for the buds. It's a natural thing so don't get too worried about it. Sounds like you're on top of the problems as much as anybody could be.

what's the pH, PPM, NUtes, etc? Water? you know the drill. Do the nutes have Cal and Magnesium? Also to help fight salt build up get a leeching product like Clearex and follow directions it works well for me and my plants

I see that you said pH is fine, also full doses may be too much, I might agree with Potpimp but the brown crispies have me thinking of some other things.....

Gygax1974 said:

I see that you said pH is fine, also full doses may be too much, I might agree with Potpimp but the brown crispies have me thinking of some other things.....

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Such as? Also I did use clearex at half strength (4 oz in 8 gallons), there is no bug infestation that I can see and I've looked everywhere.

mo_sizzly said:

Such as? Also I did use clearex at half strength (4 oz in 8 gallons), there is no bug infestation that I can see and I've looked everywhere.

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Cal Mag, do you use? It looks like burn or maybe a cal def., not positive but I have had both happen to me and the brown crispy is usually the give away. If the leaf was all yellow I would agree with potpimp 100%, I might be wrong though just looking out for you, you know?

So if it's a deficiency of some sort it was probably from nutrient lockout from the salt buildup in the old pump, right? So now that I've replaced the pump and used Clearex that problem should be solved. Will the plant recover and is there anything more that I can do to improve it's condition?

Well, yellowing like that at only Day 23, which is the end of Da Stretch and the beginning of flower formation, tells me that the plant is starved for nutrient. She is draining her reserves to try to keep up. I think you've taken care of any build-up, and lockout, so give her some nutes.

HTH

I have given her the nutes, so I guess I'll see what happens. Thanks for the input.

I don't know if this is it. You can check the grow faq. for more plant problems


Magnesium (Mg)
Magnesium is a component of the chlorophyll molecule and serves as a cofactor in most enzymes.
Magnesium (Mg) deficiency:
Magnesium deficiency will exhibit a yellowing (which may turn brown) and interveinal chlorosis beginning in the older leaves. The older leaves will be the first to develop interveinal chlorosis. Starting at leaf margin or tip and progressing inward between the veins. Notice how the veins remain somewhat green though as can be seen in figure 15.
Notice how in figure 16 and 17 the leaves curl upwards like they're praying? They're praying for Mg! The tips may also twist.
This can be quickly resolved by watering with 1 tablespoon Epsom salts/gallon of water. Until you can correct nutrient lockout, try foliar feeding. That way the plants get all the nitrogen and Mg they need. The plants can be foliar feed at ½ teaspoon/quart of Epsom salts (first powdered and dissolved in some hot water). When mixing up soil, use 2 teaspoon dolomite lime per gallon of soil.
If the starting water is above 200 ppm, that is pretty hard water, that will lock out mg with all of the calcium in the water. Either add a 1/4 teaspoon per gallon of epsom salts or lime (both will effectively reduce the lockout or invest into a reverse osmosis water filter.
Mg can get locked-up by too much Ca, Cl or ammonium nitrogen. Don't overdo Mg or you'll lock up other nutrients.