I am growing blue cheese autos that seem like plants are very small. They are in their 4th week. Am I wrong thinking the size is small? Could this be from too low of light?
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Give them another week and see how they look, this is about the time they usually start taking off. All look happy and healthy!
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What light do you have them under?
I had them under 250w MH, but i just increased it to 400w when i got a cool tube set up for it.
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I’m not a light expert but it sounds like it should be enough lol 
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Sorry but is it 4 weeks from planting or 4 weeks from emergence.
The growth is exponential.
Your plant will probably double again in size in 5 days.
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Its been 3 1/2 weeks since they sprouted.
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Me neither, but I used to have a 400 MH over ten years ago. My eyes are still damaged. Tried three HPS @ 150W each and also grew well (closet grow).
If I remember correctly MH makes about 40% blue light and our plants do best around 20%, why people used HPS a lot. Reds are more photosyntheticaly active. A little waste but no problem if you can afford it.
Welcome @Bigb2 happy gardening!
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this made me chuckle
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Welcome to the neighborhood 
Your plants look happy and healthy. They will most likely surprise you in how much they grow in the nest couple weeks. Happy Growing! 
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that bud is deserving a close-up. Make me use +zoom eh! 
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