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Hydroponic, Diva, Cucumbers, Bitter

Posted by jobil AZ, SW (My Page) on
Thu, Feb 21, 08 at 18:27

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.


Follow-Up Postings:

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RE: Hydroponic, Diva, Cucumbers, Bitter

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.


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RE: Hydroponic, Diva, Cucumbers, Bitter

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!


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RE: Hydroponic, Diva, Cucumbers, Bitter

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


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RE: Hydroponic, Diva, Cucumbers, Bitter

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


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RE: Hydroponic, Diva, Cucumbers, Bitter

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


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RE: Hydroponic, Diva, Cucumbers, Bitter

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?


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RE: Hydroponic, Diva, Cucumbers, Bitter

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.


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RE: Hydroponic, Diva, Cucumbers, Bitter

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


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RE: Hydroponic, Diva, Cucumbers, Bitter

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.


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RE: Hydroponic, Diva, Cucumbers, Bitter

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


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RE: Hydroponic, Diva, Cucumbers, Bitter

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

-Mus

Here is a link that might be useful: Vegetable PH and PPM Chart


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RE: Hydroponic, Diva, Cucumbers, Bitter

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.


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