Moonwolf52

Here's my problem. Some of the leaves are getting yellow spots. The leaves themselves are still pliable and not brittle. The plants are in the 5th week of 12/12. Any assiatnce would be appreciate.

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knna

It seems overfeeding to me. Do a complete flush now, and next time use lower nutes concentrations, and still less during summer.

Next time, open the thread at "The Nursery", and fill the questionary. It allows to better diagnosis. This case seems clear to me, but many times, you need to say what medium, nutes, light, ph, etc you are using in order to identify the problem.

Good luck recovering those plants

knna

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alteredego

I agree with knna, it does look to be over fertilizing but the more info you supply us with, the easier it is to help diagnose the problem.

Nursery Questionaire

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alteredego

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"I believe that imagination is stronger than knowledge -- myth is more potent than history -- dreams are more powerful than facts -- hope always triumphs over experience -- laughter is the cure for grief -- love is stronger than death."

MrGreen

It looks like a calcium deficiency to me, which is sometimes due to low pH.


Look about 1/3 of the page down- International Cannagraphic Magazine Forums - The Complete guide to Sick Plants,pH, and Pest troubles!

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bluebloodletter

I can't imagine how overfeeding would cause that....

Though you should probably fill out a questionnaire.

Freakshow68

You can copy and paste the nursery questionnaire from here.

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You cannot help the poor by destroying the rich.
You cannot strengthen the weak by weakening the strong.
You cannot bring about prosperity by discouraging thrift.
You cannot lift the wage earner up by pulling the wage payer down.
You cannot further the brotherhood of man by inciting class hatred.
You cannot build character and courage by taking away people's initiative
and independence.
You cannot help people permanently by doing for them, what they
could and should do for themselves. - William J. H. Boetcker

Moonwolf52

OK, here is the questionaire filled out.

Hydro Growers:
1. Are you growing from seed or clones? Seed
2. How old are your plants? 5th week of flowering
3. How tall are your plants? 29 inches
4. What type of hydro system are you using? ebb & flow
5. What brand/type of nutrients are you using? Fox Farm Grow Big, Big Bllom, Tiger Bloom, Open Sesame, Cha Ching, Botanicare Cal-Mag and SensiZym
6. Do you have a PPM/EC meter? yes
7. What is the PPM/EC of your tap water? 1130 PPM
8. What is the PPM/EC of your nutrient solution? 3630 PPM
9. What is the temperature of your nutrient solution? 78 degrees F.
10. Does your PPM/EC show a rise or fall when you do your daily PPM check? rise
11. Does your pH show a rise or fall when you do your daily check? rise
12. Do you foliar feed or spray your plants with anything? no
13. What kind of lights do you use and how many watts combined?
400 W HPS
14. How close are your lights to the plants? 10 inches
15. What size is your grow space in square feet? 24" x 24"
16. What is the temperature and humidity in your grow space?
80 degrees F, humidity unknown
17. Have you noticed any insect activity in your grow space? No
18. How much experience do you have growing? 6 years in hydro

Hopefully you can figure out what is wrong. Thanks in advance.

knna

I really wonder how you had been capable of growing hydro with that figures.

Do you use that tap water as it? Or do you dilute it (RO, distilled).

3630 ppm is far, very far over accepted ranges. With 100w/sq ft and summer, that nutes concentration is definitivelly too high. Please, add the conversion factor used when reporting TDS: 3630 ppm@0,5 is 7,26 mS/cm, but 3630ppm@0,7 is 5,18 mS/cm (anyway, too high).

You are adding Botanicare CalMg to a 1130ppm water. Why?

Id love if you give more details on how you have managed that water in the past. If you have grown before with that figures and no problems, i admire you, and i recognize i dont know nothing about how hydro works.

knna

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Moonwolf52

I appreciate any info you can give me.

Freakshow68

The ppm of your tap is that high. Holy Crap! I though mine was bad at 370. You need to either go to walmart and buy "Drinking Water" or get a reverse osmosis filter.

__________________
You cannot help the poor by destroying the rich.
You cannot strengthen the weak by weakening the strong.
You cannot bring about prosperity by discouraging thrift.
You cannot lift the wage earner up by pulling the wage payer down.
You cannot further the brotherhood of man by inciting class hatred.
You cannot build character and courage by taking away people's initiative
and independence.
You cannot help people permanently by doing for them, what they
could and should do for themselves. - William J. H. Boetcker