I have 6 auto purple cush that are just about in veg stage. They are in a 4x4 tent. I have a 320w light. I have it a 4ft above the canopy. The ppfd is 300 at the canopy, which seems to be about right from what inhave read. Are the plant going to stretch too much at that height ?
Light height
- Thread starter Seadaemon
- Start date
I've read that's about right too - but some strains just go nuts anyway so I don't take too much notice
Nutes + light I give as much as possible until I see the slightest sign of damage, wind it down a bit from there
Delps8
Well-Known Member
Plants stretch when they're not receiving enough light. The height of the light (the "hang height") doesn't make a difference to the plant.
One of the signs of a plant that's getting good light is that it doesn't stretch. Plants that are well fed tend to be short and have a lot of branches and leaves. When plants get a lot of light they can generate a lot of glucose and can develop their "infrastructure". This allows them to create a more flowers which will tend to continue the species.
Plants that don't get much light are tall and slender, have fewer leaves that are larger, and have a larger internodal space.
300µmol is a good light level for seedlings and early veg. The more light you give cannabis, the larger the yield, assuming that your plant can use the light that you're giving them.
Cannabis will thrive at very high light levels. The values in this table are from my current grow.
These are the PPFD values as of a few minutes ago:
Crop yield increases in an almost linear manner as light levels increase so, if you're interested maximizing yield, the only way to achieve that is to give them a lot of light. There's no evidence of a reduction in cannabanoids when yield increases, interestingly.
One of the signs of a plant that's getting good light is that it doesn't stretch. Plants that are well fed tend to be short and have a lot of branches and leaves. When plants get a lot of light they can generate a lot of glucose and can develop their "infrastructure". This allows them to create a more flowers which will tend to continue the species.
Plants that don't get much light are tall and slender, have fewer leaves that are larger, and have a larger internodal space.
300µmol is a good light level for seedlings and early veg. The more light you give cannabis, the larger the yield, assuming that your plant can use the light that you're giving them.
Cannabis will thrive at very high light levels. The values in this table are from my current grow.
These are the PPFD values as of a few minutes ago:
Crop yield increases in an almost linear manner as light levels increase so, if you're interested maximizing yield, the only way to achieve that is to give them a lot of light. There's no evidence of a reduction in cannabanoids when yield increases, interestingly.
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