Hydroponic, Diva, Cucumbers, Bitter

jobilFebruary 21, 2008

Using NFT and keeping TDS 2000-5000, trying to keep pH 6-6.8. cucumbers are slow, most blossoms not making, and cucumbers are bitter on the stem end. On same line is tomatoes and they are doing fine. Nutrient temperature is usually 60-68F. I am very new any help really appreciated.

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safwat

Your pH and TDS are only optimum for Tomatoes, but the Cucumbers need pH 5.5 and TDS 1190-1750. I recommend to plant the Cucumbers in separate line or trough and give them the proper pH and TDS.
Good luck in your growing.

    Bookmark   February 21, 2008 at 11:18PM
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charlielittle(7)

That's good to know safwat! Is there a list out there somewhere that shows all the proper levels for various fruits and veggies grown with hydroponics? I'd love to know as much as possible without trial and error!

    Bookmark   February 22, 2008 at 6:46AM
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renais(nm)

Howard Resh has some good articles on hydroponic vegetable growing on his web site, www.howardresh.com. There are lots of recipes out there on the web. I find the nutrient recommendations of hydrogardens in Colorado Springs to be quite good for my use. If Diva is bitter, it is usually because it is growing with a good bit of stress; you might try lowering the tds, and also looking at an alternative growing method; nft can be hard on cucumbers if there are excursions from their optimal nutrient levels.
Renais

    Bookmark   February 22, 2008 at 7:17AM
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greystoke(South Africa(11))

charlielittle wrote:
Is there a list out there somewhere that shows all the proper levels for various fruits and veggies grown with hydroponics?

Try this link

    Bookmark   February 22, 2008 at 9:35AM
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safwat

Hi Charlielittle,
Here is a list of pH/PPM/CF for Various Vegetables.
Note that PPS=TDS, and if you divide CF values by 10 you get EC/mS-1. Please go to the following website:
www.gthydro.com/vegetables.html

    Bookmark   February 22, 2008 at 5:11PM
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plantboy_grower(9)

Here is what I'd like to know:

Vegetables Ph category cF PPM
Tomatoes 6.0-6.5 H 20-50 1400-3500

The cF and the PPM seem to have such a large range. How do you choose?

    Bookmark   February 23, 2008 at 12:01AM
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charlielittle(7)

Low side for starter plants and increase with plant growth and maturity. Takes experience I guess to know exact amounts for particular plant growth stages.

    Bookmark   February 23, 2008 at 6:03AM
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plantboy_grower(9)

Wow my truncheon meter only goes up to 36 CF - 50 is off the chart :)

    Bookmark   February 25, 2008 at 11:00PM
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willardb3

I will note, from the linked table, that capsicums show a nutrient requirement of 1260-1540 ppm. I have been growing chiles (capsicum) in hydro for years and the recommended nutrient is high by a factor of 3 or 4.

Chiles with this much nutrient show burn in 2 or 3 days.

    Bookmark   February 26, 2008 at 1:34PM
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plantboy_grower(9)

Thanks for the info Willard. I wonder though if the ph and/or nutrient brand plays into it as well, regarding the PPM.

    Bookmark   February 26, 2008 at 10:54PM
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muslickz(Zone 9 CenFL)

Here's a link to a chart on Vegetable PH and PPM.

-Mus

Here is a link that might be useful:

    Bookmark   March 4, 2013 at 7:52PM
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ratherbboating(6)

Cukes are a warm weather crop. I noticed that you said temp of solution was 60-68. Unless you are growing some cool weather type, I would guess the temp is too low.

    Bookmark   March 6, 2013 at 1:57PM
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