Anything wrong with my lettuce (picture include)

simonfMarch 27, 2008

These are my lettuce about 30 days old. I grow this indoor with a 23w fluorescent light (16 hour/day). The nutrient is about 900-1000ppm.

The stem look abit weak and some unable to support the heavy leaf. Is this normal for lettuce?

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grizzman

I'm by no means a lettuce expert as I haven't grown it, but from just looking at the pictures, they appear kind of spindly. This is normally an indication of not enough light.
How close to the plants do you set your fluorescents?
Is the fixture in the last picture your only light source?
If so, I would definitely say you need more light.

    Bookmark   March 27, 2008 at 10:41AM
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greystoke(South Africa(11))

I like your set-up. Very professional, and I like your "admin"-writing on the alu-foil. Neat, but I think that I agree with grizzman otherwise.

    Bookmark   March 27, 2008 at 12:15PM
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willardb3

Not enough light and they are getting leggy.

Takes about 30 watts/square foot.

    Bookmark   March 27, 2008 at 1:34PM
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simonf

Yes that the only light source for the plant. The light is about 1-2 feet. Maybe I will add another one.

    Bookmark   March 28, 2008 at 12:48AM
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grizzman

yes and keep them closer to the plants.
for your setup, you could use 18" fluorescent tubes, either 2 or 4, and keep them 2"-3" off the plants.

    Bookmark   March 28, 2008 at 7:08AM
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iliketoast

Also, consider buying a fluorescent light designed for plant growth. Standard 23W bulbs look fine to people, but plants can't use a good bit of the light they emit.

    Bookmark   March 28, 2008 at 9:53PM
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simonf

Are those light used for aquarium plant suitable for hydroponic?

    Bookmark   March 30, 2008 at 10:27PM
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