Spotty Leaves! Please Help! - Cannabis Cultivation

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chinabean
Stranger

Registered: 06/01/09
Posts: 6
Last seen: 15 years, 7 months

Spotty Leaves! Please Help!

#244387 - 06/29/09 09:01 PM (15 years, 8 months ago)

1. Are you growing from seed or clones? SEED
2. How old are your plants? ABOUT 2 WEEKS INTO VEG
3. How tall are your plants? 6"
4. What size containers are they planted in? 3.5GAL
5. What is your soil mix? MIRACLE GROW MOISTURE CONTROL
6. How often do you water and what type of water do you use? FAUCET WATER EVERY DAY WHEN THE TOP OF THE SOIL LOOKS DRY
7. What is the pH of your water? SET TO 6.0
8. What kind of fertilizer do you use and what is its NPK ratio? TERRA VEGA, RHIZOTONIC AND CANNAZYM ALL BY CANNA.
9. Do you foliar feed or spray your plants with anything? I FOLIAR WATER EVERY DAY IN THE MORNING AND AT NIGHT. I ADD A FEW DROPS OF SUPERTHRIVE TO THE FOLIAR FEED MIX.
10. What kind of lights do you use and how many watts combined? 400W MH LIGHT IN A 20 CUBIC FOOT CLOSET.
11. How close are your lights to the plants? 6 INCHES, BUT HAVE 3 FANS BLOWING DIRECTLY ONTO THE SINGLE PLANT FROM DIFFERENT DIRECTIONS.
12. What size is your grow space in square feet? 2.25FT X 3FT
13. What is the temperature and humidity in your grow space? 80 DEGREES AND ABOUT 50% HUMIDITY.
14. What is the pH of the soil? 7
15. Have you noticed any insect activity in your grow space? NOT THAT I'VE SEEN
16. How much experience do you have growing? FIRST GROW, BUT IM NOT A RETARD.

So my question is, what are these spots I'm seeing on my plants? From what I've read I think the most likely cause is a magnesium deficiency. It seems to spreading to other leaves, but not at dramatic as the one obvious fan leaf. I've prepared a spray bottle with about 3T of CalMag and Superthrive, and just applied it before taking the photo. Also, I topped the plant 4 days ago because of height restrictions.

If you have any advise or if it's not a Mg def. please let me know. Thanks!

Edited by chinabean (06/29/09 09:04 PM)

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