How to kill aphids Throw the peel of lemons into 300ml of boiling water and leave to simmer for half an hour or so. Meanwhile, pour the lemon juice into a spray can or a watering can with a rose and spray the affected leaves and stems on your plants. Aphids hate citrus, and will either die or disappear, leaving your plants to recover beautifully.
Baking soda neutralizes the ph in the soil and nothing will grow there. use baking soda around all of the edges of flower beds to keep the grass and weeds from growing into beds. Just sprinkle it onto the soil so that it covers it lightly. Do this twice a year - spring and fall. Awesome!