You may also notice slowed growth or young plants dying altogether.

Let the solution steep overnight.

Strain and Place in Spray Bottle

Strain out the leaves using cheesecloth or a fine strainer.

Aphid and larvae on a rosebud

The Spruce

Add an additional cup of water and pour it into a spray bottle.

Be sure to label the bottle.

Garlic Oil Spray

Organic gardeners have long relied on garlic as part of their pest-fighting arsenal.

Materials and tools to make a homemade aphid spray

The Spruce / Jayme Burrows

Chop and Steep Garlic

Finely chop three to four cloves of garlic.

Place in a small bowl, and add two teaspoons of mineral oil.

Let this mixture sit for 24 hours.

Tomato leaves soaking in yellow and white bowl for aphid spray

The Spruce / Jayme Burrows

Strain and Place in Container

Pour two cups of water into a glass or plastic bottle.

Use a strainer to remove the garlic pieces and add the remaining liquid to the water.

Add one teaspoon of dishwashing liquid such as Dawn.

Wet tomato leaves strained through cheese cloth in a cup of water

The Spruce / Jayme Burrows

This mixture can be stored and diluted as needed.

Add to a spray bottle before using.

Before using this spray on the entire plant, test it by spraying an inconspicuous part of the plant.

Tomato leaf and water mixture sprayed on to aphid-infested plants

The Spruce / Jayme Burrows

If there is leaf damage, dilute the mixture with more water and try the test again.

It is best to keep as many beneficial insects around as possible.

This spray should only be used if you have not seen any beneficial bugs in your garden.

Garlic chopped finely in small white bowl

The Spruce / Jayme Burrows

Otherwise, you should use the tomato leaf recipe, which will not harm beneficial bugs.

Other Natural Methods

Pomilio, A.B.

Reflective Mulches Foil Insects.

Chopped garlic being strained over glass container for aphid spray

The Spruce / Jayme Burrows

University of California, Agriculture and Natural Resources.

Garlic aphid spray applied to shrub branches

The Spruce / Jayme Burrows