weed tea is good for plants as well
Basically get all the weeds that were on your earth shove them in say a 2lt milk container fill with water squeese to remove some air and cap. Leave for a days or weeks in the sun, stab the cap and spray on your plants. Plants love it, your hands, boots and trousers on the otherhand hate the smell.
Alternate version add a aeration stone and keeps the mix warm. This results in a different brew and can be feed to the leaves direct if you want.