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Thread: Please help - Switched to LEDs ==> slow growth, no budding!

  1. #1

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    Default Please help - Switched to LEDs ==> slow growth, no budding!

    Hi guys,


    I’m quite desperate right now so let me skip to the point (at the bottom you’ll find tl;dr)


    Setup and performance until now
    - Seasoned indoor grower (~ 6 years)
    - Setup: 8x4 (240x120 cm) grow tent
    - Lighting: 2x 600w HID (Lumatek, Adjust-a-Wings reflectors)
    - Method: SCROG
    - Strain: Dinafems’ Moby Dick (8 plants)
    - Medium: Soil (Plagron) in classic ~10 gal (40L) pots
    - Feeding/nutrients: Canna Terra (Vega, Flores, Rhizotonic, Cannazym, PK13/14)
    - Grow cycle: From clones to 75% filled screen 18h MH cycle for about 3 weeks and 2 months of 12h flowering.
    - Performance: 1 – 1,25 g/W


    I wanted to expand operation and due to HID electricity/output ratio turned to LEDs. As preassembled LED systems are very expensive, I did my fair share of research and at the end decided to do it myself.


    This is my new setup
    - Setup: 8x4 (240x120 cm) and 6,6x4 (200x120 cm) screen (w/o growbox)
    - Lighting: 2 x MeanWell HLG-480H-48A each driving 8 x Samsung HinFlux L09 SL-B8V4N90LAWW 3000K Lm301b diode LED strips + 2 x MeanWell HLG-320H-48A each driving 5 x same LED strips. Strips are mounted on ALU profiles (heatsinks) warming up to 58 – 60 C.
    - Method: SCROG
    - Strain: Dinafems’ Moby Dick (8 + 4 plants). 4 plants are under additional 6,6x4 (200x120 cm) screen.
    - Medium: Soil (Plagron) in ~13,2 gal (50L) AIR pots.
    - Feeding/nutrients: Canna Terra (Vega, Flores, Rhizotonic, Cannazym, PK13/14)
    - Grow cycle: From clones to 75% filled screen 18h MH cycle for about 1,5 month and almost 3 weeks into flowering I got first signs of buds.
    - Performance: /


    So, main three changes are the lighting, removal of grow tent and pots. There were previous attempts to expend operation by setup additional screen and putting lights on light movers, but that setup just didn’t give enough light and performance was poor (even less than in tent, about 0,8 g/W). Everything else was the same.


    What is the problem now? Veg took twice the time it took under HIDs, but OK, these LEDs are 3000K so I was expecting slower growth. However, the main problem is that even 3 weeks into flowering I don’t see any real budding. With HIDs it usually took just a couple of days for first pistils to appear, now 3 weeks into flowering only few can be seen... Otherwise, plants are looking very healthy, no visible problems etc.


    I attached few pics for better understanding.


    Can someone please explain what am I missing, doing wrong, should be doing differently and most importantly should I keep my optimism or expect failure?


    tl;rd: Switched from HID to LEDs, rate of growth and flowering are very slow and in general just underperforming.
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  3. #2

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    What do you mean when you say that you wanted to expand the operation?
    "Accuse the other side of that which you are guilty."
    (Joseph Goebbels)

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  5. #3

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    Oh, I see....

    Strain: Dinafems’ Moby Dick (8 + 4 plants). 4 plants are under additional 6,6x4 (200x120 cm) screen.
    - Medium: Soil (Plagron) in ~13,2 gal (50L) AIR pots.
    Goodbye!

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    Quote Originally Posted by M_C View Post
    Oh, I see....



    Goodbye!




    in a green and pleasant land

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  9. Default

    You are the weakest link

    If you're reading this as a guest banned guy, always best to check a forums rules..

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    Shame as those are some proper Samsung Horticulture leds.

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  13. #7

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    Default p300 led grow light

    hi came across P300 led grow light similar to advance platinum series at much cheaper price. thought of sharing with you.

    search for p300 grow light at ebay. Priced at 200usd shipping 75usd

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    And I was about to ask if they used blurple LEDs. Never mind...
    Fight for your health.

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  19. #10

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    Quote Originally Posted by gardro View Post
    Shame as those are some proper Samsung Horticulture leds.
    I was thinking that. Was hoping for a good thread on them but never mind eh, maybe next time!

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