Results 1 to 9 of 9

Thread: Burn spots on leaves.

  1. #1

    Join Date
    Mar 2020
    Posts
    5
    Thanks
    4
    Thanked 22 Times in 5 Posts

    Unhappy Burn spots on leaves.

    There is something going on with my plants i don't know how to fix.
    This is my first time doing this and im a bit loss.

    First data:
    Soil is inert sphagnum peat and perlite (50%/50%)
    Im Remo nutrients ferts complete line
    I also use RO water for everything.

    I was using 1ml/L of grow, micro, velokelp, magnifical.
    EC fluctuates 900~700 i dilute for some plants since they didn't germinate all at the same time.

    PH i was focusing on 6.5 before and not going to 6.8 because i thought it was a Ca deficiency.

    So Wed i noticed one of my plants had a burn stop and it was generally yellow between the veins.
    I researched and apparently its is Mg deficiency maybe Ca.

    Runoff PH was on on 6~6.2 and that made me think there was a problem for Ca.
    I did a flush with buffered water until i had 6.5~6.4.
    I feed them 1 day and then 2 days RO water.

    Then i feed gave buffered water and foliar feeding of 1mg/L magnifical wed and thursday.
    ( i waited the lights go out and misted them stem and below leaves ).

    Thursday i also feed them Just magnifical 1ml/L

    No brown spots appeared, growth looked healthy and i feed them normally today with a bit more magnifical 1.25ml/L

    I tend to mist them throughout the day, with ro water, and i dont know if that could be burning them.

    RH goes from 40% to 70% depends on hour.
    Temp goes from low 22 to max 29 C ( 71, 84 F )

    I feed them with a 200ML cup each pot is approx 1 gallon ( 3 litres ).
    Thats enough to have a about 1 finger on the tray below them.

    I'm a bit lost on what to do.

    These are the images.
    I have an album on imgur but i cant post links
    /a/VO34CSH


    Any help is appreciated.

  2. The Following 4 Users Say Thank You to Maconhista For This Useful Post:

    British green (05-05-20), Greengrass (01-05-20), hotshot (01-05-20), Mac (02-05-20)

  3. #2

    Join Date
    Apr 2017
    Posts
    8,064
    Thanks
    21,686
    Thanked 20,682 Times in 4,915 Posts

    Default

    Your gonna need pic's of the plant mate, try and get lights off so people can see

    From behind the bushes


    "Patience is bitter, but its fruit is sweet."

  4. The Following 5 Users Say Thank You to Easy-T For This Useful Post:

    British green (05-05-20), Greengrass (01-05-20), hotshot (01-05-20), Mac (02-05-20), Maconhista (01-05-20)

  5. #3

    Join Date
    Mar 2020
    Posts
    5
    Thanks
    4
    Thanked 22 Times in 5 Posts

    Default

    There is half a imgur album link there.
    It's just that i dont have 10 posts yet to proper edit the link.

    imgur.com/a/VO34CSH

  6. The Following 4 Users Say Thank You to Maconhista For This Useful Post:

    British green (05-05-20), Greengrass (05-05-20), hotshot (01-05-20), Mac (02-05-20)

  7. #4

    Join Date
    Apr 2014
    Location
    USA
    Posts
    4,097
    Thanks
    5,606
    Thanked 8,715 Times in 3,176 Posts

    Default

    I would feed them just like coco every time you water. I would also drop the pH down to about 5.8 to 6.3 and let it wander a bit. I would make sure to water to run off every single time at least 10%. With a completely inert media it's important to get good run off every time and to feed every time. Then you have absolutely no need to flush.

    Sent from my SM-G975U using Tapatalk

  8. The Following 5 Users Say Thank You to jingo For This Useful Post:

    British green (05-05-20), Greengrass (05-05-20), hotshot (01-05-20), Mac (02-05-20), Maconhista (01-05-20)

  9. #5

    Join Date
    Mar 2020
    Posts
    5
    Thanks
    4
    Thanked 22 Times in 5 Posts

    Default

    So use hydroponics PH while feeding them every day?

    What do you mean about water to run off at least 10%?


    Like feed until the little dish below them have at least 10% of pot size? 3 litters would be 300 ml the dish simply cant take so much water.

  10. The Following 5 Users Say Thank You to Maconhista For This Useful Post:

    British green (05-05-20), Greengrass (05-05-20), hotshot (01-05-20), jingo (01-05-20), Mac (02-05-20)

  11. #6

    Join Date
    Apr 2014
    Location
    USA
    Posts
    4,097
    Thanks
    5,606
    Thanked 8,715 Times in 3,176 Posts

    Default

    Yep 10% run off means at least 10% of your pot size goes out the bottom and a lot of guys put their plants up on blocks and have big trays underneath that catch the water and then they vacuum up the water stuff like that.

    The runoff keeps any nutrients from building up in your medium, once you get build up then you start getting all kinds of strange deficiencies. I can't remember if I was bothering to measure EC or total dissolved solids when I was doing Remo, I don't think I was.... I don't think it was entirely necessary with the organic nutrients.

    Sent from my SM-G975U using Tapatalk

  12. The Following 6 Users Say Thank You to jingo For This Useful Post:

    British green (05-05-20), Greengrass (05-05-20), hotshot (01-05-20), Mac (02-05-20), Maconhista (01-05-20), M_C (01-05-20)

  13. #7

    Join Date
    Apr 2014
    Location
    USA
    Posts
    4,097
    Thanks
    5,606
    Thanked 8,715 Times in 3,176 Posts

    Default

    Of course, you only water as often as it takes to keep the pot from getting too light or too dry.

    Your plants also appear to spend plenty of time with higher pH, so I wouldn't bother misting the stems or the leaves. Or perhaps, you need to get more air movement more fans blowing across them. the wide leaves are common when the air movement is low or the relative humidity is high. Either way a little bit more fan action or lower humidity wouldn't hurt.

    Sent from my SM-G975U using Tapatalk

  14. The Following 5 Users Say Thank You to jingo For This Useful Post:

    British green (05-05-20), Greengrass (05-05-20), hotshot (01-05-20), Mac (02-05-20), Maconhista (01-05-20)

  15. #8

    Join Date
    Mar 2020
    Posts
    5
    Thanks
    4
    Thanked 22 Times in 5 Posts

    Default

    I have a small fan right above them.
    They rustle very lightly.

    They spend lots of time at 40% humidity 50%.
    It goes to 38% 37% sometimes.

    I mist to get to high 60% for like half a hours every 3 hours or so.

  16. The Following 5 Users Say Thank You to Maconhista For This Useful Post:

    British green (05-05-20), Greengrass (05-05-20), hotshot (02-05-20), jingo (01-05-20), Mac (02-05-20)

  17. #9

    Join Date
    Mar 2020
    Posts
    5
    Thanks
    4
    Thanked 22 Times in 5 Posts

    Default

    Ok so following the advice the burn spots stopped appearing.

    Using hydroponics ph now and feeding them everyday.

    Thanks everyone.

  18. The Following 4 Users Say Thank You to Maconhista For This Useful Post:

    British green (05-05-20), Greengrass (05-05-20), hotshot (05-05-20), jingo (05-05-20)

Tags for this Thread

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  


THCtalk.com Disclaimer - You must be over 18 years old to view/use this site .THCtalk.com does not encourage growing Cannabis or possessing Cannabis. Learning how to grow Cannabis instructions should be for educational purposes only. All Information contained in this web site is for: Historical reference, Scientific reference and Educational purposes only. Visitors to this website are advised against breaking the law as It is illegal to smoke, grow, or possess cannabis in the UK and some US States