The farm angle is correct, but our water table surface is less than 8' down and our well is 165' down. When you spray with some of these poisons and 'roundup' is at the top of the list..... that stuff goes into the leaves and down through to the roots. However, while the plant is dead, the poison still seeps out and can go down into the earth, thus contaminating soil, directly. Now, when water, from rain, watering flowers or anything comes into the picture, it still drains down and the soil can only filter out so much of pollutants, chemicals and whatever else is in your soil. So why..... add poison on purpose to the system ??
The flame-thrower works, but only for the moment. It kills everything on top of the soil, but never really reaches the roots and the stuff comes back stronger in a week or two and it starts all over.
There are some really good weed killers that are totally safe, but it gets expensive and time consuming. Nope, much easier to just whack those little b@st@rds off each week and control it that way.
If you really wanna do it right..... vinegar, salt and dish soap will kill 'em for good and anything else that might get the solution on it. Vinegar alone will do it, but you need the salt to KEEP 'em dead and the soap makes it all stick to the plants. Good combination for the situation you have pictured where nothing else can get harmed.
