The flood waters may have washed away crops, but they have left that land contaminated.

From green to gone, one of the biggest causalities in last week's flooding is agriculture.

Across the state, millions of dollars in crops are now destroyed or unsafe to eat.

Purdue Agriculture Extension Office Educator Stacye Johnson said, “If you had garden produce, plants above ground, below ground, whether they had fruit set on them or not you need remove and destroy the plants.”

That's because, from fields to gardens, flood water has contaminated the produce.

Johnson said, “You don't know what was in the water. There could have been raw sewage in the water, or other contaminates.”

Agriculture experts say don't try to clean the crops or use any sanitizing sprays.

Johnson said, “There is nothing that you can clean it with that will guarantee 100% that you're not going to be consuming bacteria.”

Experts say bacteria, like e-coli can stay in flooded out fields like this one for 120 days or more, making it dangerous to replant.”

Johnson said, “Replanting after, you would have to wait a minimum of 120 days… You need to treat the soil in your garden as if you just applied raw manure to it.”

Selling contaminated crops isn't only unsafe, it's illegal.

Johnson said, “It's considered adulterated by the Food and Drug Administration.”

So, experts say unless you have a plot of land completely untouched by flood water, you may want to forgo planting a garden this year.

Agriculture experts in Knox County estimate 20% of the county's agriculture land has been affected by the floods.

They advise gardeners or farmers to plant a cover crop, such as clover, over the affected area this season.