Questions tagged [poisons]

For questions about poisons - both animal and plant.

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24
votes
2answers
3k views

Nothing will grow where tree was

Back in the spring we cut down a fruitless mulberry and hired someone to come grind the stump. When they were leaving they informed me that they poured a chemical into the hole where the remaining ...
24
votes
1answer
1k views

Garden Hoses: how safe are they?

After noticing that some garden hoses carry a warning, "Not to be used for drinking water", I recently switched to one labelled "non-toxic". Does this only mean that the hose is lead-free, or also ...
6
votes
1answer
3k views

Is this poison oak?

Here is a picture of a plant from a forest in Northern California. Is this poison oak? I’m guessing it’s not, though it does have leaves of three and a slightly longer middle stem. Can an expert ...
50
votes
2answers
21k views

How long before poisons like Round-up become inert?

If I spray some grass with a poison like Round-up or Kills All, how long before that spray is not dangerous to plants? So for example, if after spraying, I walk through the sprayed area and then onto ...
15
votes
1answer
387 views

What is the risk of soil contamination via leaf mulch/compost?

Soil in the city I live in is quite often contaminated with nasty things like arsenic and lead. Levels are sometimes twice or more what's considered acceptable. For this reason, people usually ...
15
votes
2answers
7k views

How long does chemically fertilized grass remain poisonous?

Here's my situation: I have a lawn that I've refused to use chemicals on because I have a dog who likes to graze. The lawn is now a mess of weeds and very thin grass. I've tried organic fertilizers ...