Return to the Hydroponics Forum | Post a Follow-Up

My Hydroponic Lettuce

Posted by davemichigan z 5/6 (SE Michigan) (My Page) on
Wed, Mar 19, 08 at 16:44

Hi, last winter I started my simple hydroponic experiment. So far only one lettuce and one spinach survived. It is a simple floating method.

The lettuce is growing fine, edible, but you can see that the main stem is growing long, and since I don't use any support, the plant cannot support itself, so the leaves fall sideway.


Why do you think the stem grow long like that? Is it because I didn't give it enough light (this is indoor)?

Follow-Up Postings:

RE: My Hydroponic Lettuce

Not enough light makes them grow tall and fall over (it's sometimes called 'leggy'), much like your photo shows. Excessive heat (above 80 degrees) will cause it too, but only for lettuce and cole crops, as far as I know. For everything else, it seems to be not enough blue spectrum light that makes them grow tall and weak.

RE: My Hydroponic Lettuce

Iliketoast, thanks. I think that is the case (that it doesn't get enough sunlight). I didn't know that legginess would happen/apply to grown plants. I thought it happened with seedlings only.

But does it affect the plant itself? Aside from the weird look, it still tastes good to me, but I don't have others to compare.

RE: My Hydroponic Lettuce

When it comes to lettuce no it doesnt affect the plant - other then it growing slower than if it had optimal light. If you were growing cukes or tomatoes it would affect the plant because you likely wouldnt get fruit (insufficient light)...

Plants in the garden often are light starved too. Think of A huge tomato plant growing on the south side of some smaller plants...those smaller plants are fighting for light too.

Here is a link that might be useful: The Prudent Gardener

RE: My Hydroponic Lettuce

What is your light setup and how far from the plants?

What is the room temp?

Flouros are good with lettuce as you can place it close to the plants without overheating. Flood them with light at least 12/12, or 14/10 and watch the results. They should grow very dense.

Maybe add some mylar to the sides to get additional photon collection?

Here is a link that might be useful: My Hydroponic Journal and Videos

 o Post a Follow-Up

Please Note: Only registered members are able to post messages to this forum.

    If you are a member, please log in.

    If you aren't yet a member, join now!

Return to the Hydroponics Forum

Information about Posting

  • You must be logged in to post a message. Once you are logged in, a posting window will appear at the bottom of the messages. If you are not a member, please register for an account.
  • Please review our Rules of Play before posting.
  • Posting is a two-step process. Once you have composed your message, you will be taken to the preview page. You will then have a chance to review your post, make changes and upload photos.
  • After posting your message, you may need to refresh the forum page in order to see it.
  • Before posting copyrighted material, please read about Copyright and Fair Use.
  • We have a strict no-advertising policy!
  • If you would like to practice posting or uploading photos, please visit our Test forum.
  • If you need assistance, please Contact Us and we will be happy to help.

Learn more about in-text links on this page here