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Thread: Metal halide or Yankee candle

  1. #1

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    Default Metal halide or Yankee candle

    Heya BB I have these 2 lsd autos under 400w mh
    Click image for larger version. 

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    One is 10 days old other 8 days old
    Just seems slow growth under the Mh and not good for auto's

    I try and change something each run and the last time I switched from dual spectrum hps to single use bulbs for veg n flower but what I've noticed the first true leaves don't seem to develop under the Mh
    You think switching to the super hps bulb would promote growth?
    If I put a candle in grow room 10 days ago I think I couldn't have done any worse
    May have to get a dual spec bulb but that means going back a couple of years

    Atb fella

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    I think they are far too small to be under hid yet, whether it's mh or hps. They are only babies, I know they are autos but I'm sure a t5 would be much better until they establish, like with regular plants.
    They will not have anywhere near the root mass to handle to high heat and photosynthetic stress of a 400, likely closing their stomata, not transpiring at all and therefore not growing.
    Treat them to a propagation light
    Prime



    When you do things right, people wont be sure you've done anything at all.

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    Quote Originally Posted by Greengrass View Post
    Heya BB I have these 2 lsd autos under 400w mh
    Click image for larger version. 

Name:	52201984556.jpg 
Views:	22 
Size:	220.7 KB 
ID:	372829Click image for larger version. 

Name:	52201984612.jpg 
Views:	19 
Size:	121.1 KB 
ID:	372830
    One is 10 days old other 8 days old
    Just seems slow growth under the Mh and not good for auto's

    I try and change something each run and the last time I switched from dual spectrum hps to single use bulbs for veg n flower but what I've noticed the first true leaves don't seem to develop under the Mh
    You think switching to the super hps bulb would promote growth?
    If I put a candle in grow room 10 days ago I think I couldn't have done any worse
    May have to get a dual spec bulb but that means going back a couple of years

    Atb fella
    Roots have not form as of yet, give it a few more days. JMO Usually takes 12 to 14 days for roots to get fully grown.

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    Quote Originally Posted by prime View Post
    I think they are far too small to be under hid yet, whether it's mh or hps. They are only babies, I know they are autos but I'm sure a t5 would be much better until they establish, like with regular plants.
    They will not have anywhere near the root mass to handle to high heat and photosynthetic stress of a 400, likely closing their stomata, not transpiring at all and therefore not growing.
    Treat them to a propagation light
    Prime
    Day 12 Click image for larger version. 

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    I've Allways grown autos under dual spectrum hps from seed to chop and Allways had vigorous growth which is what I need with auto's
    But this my second grow (5th plant) under MH bulb and each one has stayed squatted on the mud even though the lights at 20 inches, tried lower but the plants weren't happy
    But I do like the tighter nodes in flower
    Suppose the Lord giveth and he taketh
    Atb

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