The Drawbacks of Using Vinegar for Aphids on Roses Its acidic properties are enough to eliminate aphids and their larvae but damage your roses and other surrounding plants if you spray too frequently. Although a small amount won’t do too much damage to your flowers, it may hurt damage or kill the plant if overdone.

How do you use vinegar on roses?

Mix one tablespoon of vinegar with one cup of water. Add one and a half tablespoons of baking soda plus one tablespoon of dish soap and one tablespoon of vegetable oil (or any other cooking oil). Stir this mixture into one gallon of water, and spray it on your roses’ foliage.

Will vinegar and salt kill roses?

Spraying any vinegar on plants and flowers will eradicate them, so avoid doing that. Vinegar is not selective, and it does not differentiate between weeds and desirable plant life.