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I have set up a hydroponic system indoors and planted 6 chilli plants in one bucket. It's a DWC system where I fill the bucket with water and mix the nutrient solution and submerge the plant roots in it. I have also set up an air pump with dual outlets to aerate the solution. On top, I have grow light strips.

The problem is, out of the 6 plants, one started to wilt. I planted them two days ago. Here are some photos of the setup:

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Any idea why this is happening?

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  • show us the root systems of the healthy plants, and then check carefully for damage to the stem of the sick plant.
    – Graham Chiu
    Commented Jan 23, 2018 at 8:26
  • @GrahamChiu Thanks. I just posted a photo showing the root system of the wilted plant with a healthy one.
    – M Watt
    Commented Jan 23, 2018 at 8:36
  • You're using stones? I only use hydroton which is a light weight expanded clay product. Suggest you remove that plant from the pot and you'll see stem damage most likely.
    – Graham Chiu
    Commented Jan 23, 2018 at 9:38
  • @GrahamChiu Yes I agree. The problem is I could not found hydroton in my country.
    – M Watt
    Commented Jan 23, 2018 at 9:52
  • @GrahamChiu Just took the plant out. There seems to be some issue at the base of the plant. Is it a disease or cause by the stones?
    – M Watt
    Commented Jan 23, 2018 at 10:49

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The differences in plant sizes shown for only 2 days in your hydroponics setup suggests that the plants were different at the time they were transplanted into the pots. The sudden tapering of the stem to the roots suggests that there has been damage to the stem of the affected plant. It doesn't look rotten so it may just be trauma but the roots you show are brown rather than white so I would worry that you've got a pythium infection in your setup. It could be the lighting you use so I'd check them outside in daylight.

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  • Is it because I originally planted them in soil? Just washed the roots and planted them in this system two days ago.
    – M Watt
    Commented Jan 24, 2018 at 7:10
  • A lot of people who have small hydroponic setups will do that but often the plants are bigger with larger root structures. Transplanting at such a small size risks root damage from the heavy rocks you're using. But the other plants look okay.
    – Graham Chiu
    Commented Jan 24, 2018 at 7:13
  • Great thanks! I will keep an eye on the roots.
    – M Watt
    Commented Jan 29, 2018 at 1:16

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