Essential Ingredients and Tools

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Creating this weed killer requires minimal components. Using the correct ingredients and proportions is key to balancing efficacy and safety.

1. Choice of Rubbing Alcohol

Standard isopropyl alcohol (IPA) from the pharmacy is perfect. A concentration of 70% is often recommended for DIY mixes as it is slightly less volatile than 91% and contains more water, which can aid in dehydration. However, 91% can be used for a more potent mix, especially on resilient, waxy-leaved weeds.

2. The Role of Water

Water is used to dilute the alcohol. For most applications, a 1:1 or 2:1 ratio of water to alcohol is effective. Using pure alcohol is wasteful, evaporates too quickly for good leaf coverage, and is a significant fire hazard. Dilution makes the solution safer to handle and helps it coat the leaf surface more effectively.

3. Additives for Enhanced Effectiveness (Optional)

A few drops of liquid dish soap can be added as a surfactant. It helps break the surface tension of the water-alcohol mixture, allowing it to spread and stick to the waxy weed leaves more evenly, improving contact and overall efficacy.

4. Necessary Equipment

You will need a spray bottle (a clean, empty one-gallon garden sprayer for large areas or a standard trigger spray bottle for spot treatment), measuring cup, funnel, and protective gear (gloves, goggles). Always label the spray bottle clearly as "Weed Killer - Isopropyl Alcohol."

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