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Old 22-03-2003, 06:56 PM
zxcvbob
 
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Default Too much fertilizer makes vegetables poisonous?

mdk-bill wrote:

Tony wrote:

I read somewhere that too much fertilizer can accumulate in leafy
vegetables to the point of being toxic for human consumption, does anyone
know where I can find out more about this, especially as it relates to
hydroponics? I read this in a book on green houses, it said something
about problems with nitrogen not being used up by the leafy vegetables in
certain times of the year and thus accumulating in the edible parts of the
vegetable.

-Tony


Nitrogen is poisonous? In the quantities a plant can pick it up? Hmmmm

I suspect that whatever you were reading might have been classified as
garden F.U.D.

Bill



It was probably extrapolated information from certain grasses (like
sorghum and johnson grass) developing toxic levels of nitrates; toxic to
cattle and horses, which are herbivores.

It is certainly plausable that green leafy vegetables could pick up
toxic amounts of nitrates -- if your diet consists of nothing but those
greens every day.

Even if it's true (and I suspect it's partially true), I have more
important things to worry about.

Best regards,
Bob