Hydro Jars?

Squash/Zuchinni in quart jars

Squash/Zuchinni in quart jars

When growing a plant in a clear glass jar hydroponically, does the glass jar need to be covered by something to keep the light from reaching the roots of the plant? As roots are normally underground, I didn't know if the roots growing in darkness was a requirement. I've made a few hydro systems, but never a clear one...

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Hydro Jars?

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Jan 12, 2010
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by: Larry

Using clear jars for hydroponics should be fine. The actual light on the roots should not hurt the roots unless it heats up the water around the roots to dangerous temperatures.

Sunlight will also encourage the growth of algae which turns your water into a thick green pea soup texture. Although dramatic, algae is harmless.

And bacteria and fungus will grow much faster in water exposed to sunlight. You want and need certain types of bacteria around the plant roots but other types can be deadly to your plants.

So roots dangling in nutrient solution exposed to light will work and the only things to watch for are the effects of the light on the nutrient solution.

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