kill a weed or tree growing under deck

Question

How to kill a weed or tree that is growing under deck. Coming through deck boards and have pets and small children.
Tried gas, kerosene, weed killer. Keeps coming back like you never touched it. Been trying to kill for years.

Answer 1

Here is a few links that may offer safer options for you.

https://www.gardeningknowhow.com/special/organic/using-salt-to-kill-weeds.htm
https://www.gardeningknowhow.com/special/organic/homemade-pet-friendly-weed-killer.htm
https://www.gardeningknowhow.com/special/organic/using-sugar-to-kill-weeds.htm