When is the best time to apply vinegar to weeds?

The best time to apply vinegar to weeds is when the weather conditions are just right to maximize its effectiveness. Here are some tips to help you get the best results:

1. Apply on a Hot, Sunny Day

Warm temperatures help the vinegar work more effectively by drying out the weed quickly. The heat accelerates the vinegar’s action, causing it to penetrate the plant cells and damage the plant faster.
Ideally, you should apply vinegar during the afternoon, when the sun is at its peak and the temperature is high. This helps the vinegar to be absorbed and have the maximum effect.

2. Apply When Weeds Are Actively Growing

Young, actively growing weeds are more vulnerable to vinegar. They are easier to kill when they are in their early stages of growth.
Avoid applying vinegar during very dry or drought conditions as weeds may already be stressed and less able to absorb the vinegar.

3. Apply When There's No Rain Expected

For vinegar to have the best effect, apply it when there is no rain expected for 24 to 48 hours. This ensures the vinegar has enough time to dry out and kill the weeds before getting washed away by rain.

4. Avoid Windy Days

Since vinegar is non-selective, meaning it can harm any plant it touches, it’s best to apply vinegar on a windless day. This helps avoid spraying nearby plants or desirable vegetation that you don’t want to harm.

5. Apply Early in the Growing Season

The earlier in the season you treat weeds, the better. Spring and early summer are ideal times because weeds are still small and haven't had a chance to develop deep root systems. At this stage, vinegar can prevent them from establishing themselves in your garden.

6. Repeat Applications if Necessary

For perennial weeds or mature weeds, it may take multiple applications. Be prepared to apply vinegar every 7-10 days until the weeds are dead or significantly weakened.