No-power hydro - Kratdy method

jonfrum(6)November 6, 2012

I just learned about this method to grow hydroponics with no power - no pumps. Pretty neat. Best for small plants like lettuce.

Here is a link that might be useful: MHP Gardener shows Kratky method

Thank you for reporting this comment. Undo
grizzman

If you search this forum, you'll find where it has been discussed how much nutrient you need per plant to grow lettuce in that manner.
I like that the youtube video also linked to the original research paper.

    Bookmark   November 6, 2012 at 7:32PM
Thank you for reporting this comment. Undo
cole_robbie(6)

Notice in the video, he said that it was winter when he was doing the trial. I think the no-aeration method would only work in cold weather, or at least his results would be not nearly so similar if he had tried the experiment in summer. Aeration becomes more important as reservoir temperature goes up. That's one of the many difficulties of trying to use off-grid hydro to feed starving people in a hot place like Africa. The hot weather requires aeration, which requires energy, and if they had energy, they wouldn't be starving in the first place.

    Bookmark   November 7, 2012 at 1:10PM
Thank you for reporting this comment. Undo
grizzman

If you want an off grid hydro system, I would just use a flood n drain system. make sure the medium will hold enough moisture that only one or two waterings are needed daily and simply use muscle power to flood the trays.
I'm pretty sure the thread I suggested the OP look up involved someone in Thailand using an unaerated raft. If memory serves me, no aeration is pretty standard in that kind of system, but I think it requires lettuce. Something about there roots being better adapted to it.

    Bookmark   November 8, 2012 at 8:14AM
Thank you for reporting this comment. Undo
jonfrum(6)

The video was posted Nov. 5, and was probably shot the previous week. The location is Virgina, so it's not 'winter' growing season. Kratky himself worked at the University of Hawaii. The point of the system is that aeration comes not from the nutrient solution, but from the roots left hanging in the humid air as the solution level goes down.

    Bookmark   November 13, 2012 at 4:34PM
Sign Up to comment
More Discussions
Is a Tower Garden really worth $500?
I am considering buying a Tower Garden (towergarden.com)....
rick_merlander
New hydro/soil hybrid garden. Multiple veggies, what should I feed?
Ok so I have a good handle on a pure hydro garden and...
Joe Mckee
Questions on passive hydro
Hello guys, I currently own a big sansevieria and want...
turbare
organic hydroponic ferilizer
I am looking for a good source for organic hydroponic...
little sur farm
What can I do to learn more about planting or farming????
Hi all! I'm a beginner at hydroponics gardening......
skttls
Sponsored Products
Frasier Chair - Key Largo Grass Green
Joybird Furniture
Pour House Slug Trap
| Dot & Bo
Safavieh Area Rug: Porcello Black/Multi 7' x 7' Round
Home Depot
Dane Ceiling Fan by Craftmade
$160.20 | Lumens
Minka Lavery | Slipstream XXL Ceiling Fan
$799.95 | YLighting
Ion Floor Lamp Chrome
ModernistLighting.com
Ivory Charlston Rug
$329.99 | zulily
Tiffany-style Arroyo Floor Lamp
Overstock.com
People viewed this after searching for:
© 2015 Houzz Inc. Houzz® The new way to design your home™