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what might be the problem??

Discussion in 'Hydroponic Growing' started by repanias, Jan 12, 2013.

  1. hello i startet growing in an aerogarden , witch i though that i wouldn't find any major problems but i was wrong i guess .

    i hope u can see from the pics the problem.. yellowing leaves brown ends and plant is dieing .. any suggestions are welcome :)

    Attached Files:

  2. PH level... im guessing or feeding to much..

  3. i was thinking about over feeding it cz i added 2 tablets as the instructions said .. but it might have been talking about 7 plants instead of 1..

    about the ph is it being low or too high that its cozing yellow leaves ?
  4. btw its a vanilla kush if that helps
  5. whatever happened with this?
  6. well it died ..i belive its was dues to overfeeding.. i gave it 2 tblets( the onces that come with the airogarden). now i have in a cinderella 99 and a seed i found from some local skunk like weed , growing ok so far with no nutrients at all. ( i cahanged the water be4 planting them
    you have any suggestions for difrent nutrients and dosage ?
  7., the Lucas formula ;)
  8. man people sure love the fuck outta this Lucas Formula! :) Seem like its just saying "hey theres enough Nitrogen in your Bloom, duh!" hahahaha
  9. General Hydroponics Flora Series Feeding Strategy - Lucas Formula

    G-M-B (Grow-Micro-Bloom)
    0-5-10 - For Vegetative cycle (18/6)
    0-8-16 - For Flowering cycle (12/12)

    The numbers above indicate the number of milliliters (ml) of Flora Grow, Micro or Bloom formulas that I use in one gallon (US Liquid) of nutrients.

    You will notice I dont use any of the Flora “Grow” formula, do not need to, the Flora "Micro" provides plenty of Nitrogen.

    There are two ways to work with this formula:

    1. Top off the reservoir daily using a pH corrected water solution as required to maintain full reservoir level. After adding back an amount of water equal to the amount of your reservoir capacity you should change the reservoir and put in fresh solution.

    2. Top off the reservoir daily using a pH corrected 100% strength nutrient solution as required to maintain full reservoir level. Continue to use this nutrient solution without dumping the tank unless the PPM rises above acceptable levels.

    Between vegetative and flowering cycles you should dump your nutrients, then flush (possibly with Clearex) to remove salt buildups, then change to the other feeding program. Always shake your GH nutrient bottles before using them!

    For young plants, just transplanted into the hydro setup, give them 50% strength nutrient mix to prevent overfeeding them while their young. Gradually bring up the mix to full strength as they grow over the next few weeks or so.

    The lucas formula is normally intended for use with RO or near 0 PPM water.

    NOTE: The Lucas formula eliminates the need for Epsom salts to correct (Magnesium) Mg deficiencies in most normal feeding programs recommended by manufacturers. Cannabis needs a lot of Magnesium to thrive.

    The Flora Micro is providing the Nitrogen and the Magnesium in the proper balance, thus there is no need for the Grow formula and little or no room under the maximum acceptable ppm limit of 1600 @ 0.7 conversion.

    Calculated EC/TDS levels:

    EC microsiemen:
    0-4-8: 946 µS
    0-5-10: 1184 µS
    0-8-16: 1894 µS

    TDS @ 0.5 conversion:
    0-4-8 = 473 ppm
    0-5-10 = 592 ppm
    0-8-16 = 947 ppm

    TDS @ 0.7 conversion:
    0-4-8 = 663 ppm
    0-5-10 = 829 ppm
    0-8-16 = 1326 ppm

    Addback Calculator - (For Advanced Users)

    Say you were running the 0-8-16 formula, at 0.7 conversion with a 22 gallon res. When you first fill it up, your ppm will be around 1330.

    Now you have been growing for a week, and some of the water has been taken up by the plants, some has evaporated, and now your res is at 947 ppm. You need to get your ppm from 947 to 1330. Here is the equation:

    ((target - current) / target) * 8 ml per gallon * res gallons = Flora Micro (ml) double this figure to get Flora Bloom (ml)


    ((1330 - 947) / 1330) * 8 * 22
    (383 / 1330) * 8 * 22
    0.3 * 8 * 22 = 53 ml Flora Micro

    53 ml Flora Micro, double that and you get 106 ml Flora Bloom. So 53 ml Flora Micro and 106 ml Flora Bloom to add back to your 22 gallon res to get you from 947 to 1330.

    Using Hard Water GH Micro

    I had been experimenting with using the Hard water Micro as a substitute for the normal Flora Micro, this to account for my hard 350 PPM water and the lack of a large enough RO filter at the time. It has worked well for me. I just kept my reservoir below 1150 PPM @ .5 conversion and its all good.

    One tip - do not pH down this stuff, the hard water micro will drop pH gradually over the next 24 hours, for example I mix up a batch, it is at like 6.2, the next day, its at 5.6-5.8 after running in the system for a while. If I pH downed that to 5.7 before putting it in the system, it ended up as low as 4.8-5.2 by the next day.

    My conclusion, the hard water micro was buffering the alkaline crud in my water, it just doesnot do it ASAP fast like the phosphoric acid.
  10. is this what u guys are talking about ?
  11. well i know its a long shot but since this doesn't make any sense to me :p is it possible u could explain to me the important parts when u have time ?

  12. just keep studying. Itll make sense.

    typically when you see 3 numbers with the dashes, it mean N-P-K ratios. The way that the Lucas Formula works is by taking 3 Part Nutes and giving them a 3 number equivalent Grow-Micro-Bloom. Each of them (G-M-B) have their own N-P-K ratios but you would be following a ratio of each of the Grow Micro and Bloom. I think thats where theres the most confusion. Heres another useful link

    What is Lucas Formula, and how do I use it?
  13. thank u very much for your help! i will do my homework and keep you posted on how my first grow is doing! :)
  14. so my new plants seem to be doing ok but it looks a little pale fron the inside of the leaves . is it that it needs nutrients ? (i didn't gave it any since i plant them cz im scared of burning them )
  15. P6280009.JPG



    the first picture is the one im worried about..
  16. light green is from lack of nitrogen. Time to nute. Start light
  17. i couldn't find any liquid nutrients so i will use 20-20-20 vegetable nutrients(its for soil but i dont thing its much different than the tablet that come with the aerogarden)..does half a teaspoon for start sounds right ?
  18. not sure about that. probably just best to get something for hydroponic

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