26/02/2025
Today we’re mixing a little chemistry with gardening, it’s easier (and more fun!) than you think!
For those with a science background, this might sound familiar, but don’t worry, I’ll explain it in the simplest way possible.
So, did you know you can test the pH of your soil at home using purple (red) cabbage? 🥬 Yes, your regular kitchen cabbage can help you check if your soil is acidic, neutral, or alkaline. But first, let’s break this down.
WHAT IS SOIL pH AND WHY DOES IT MATTER?
Think of pH as your soil’s “plant nutrition manager.” It’s a scale from 0–14 that tells you if your soil is acidic (like lemon juice), neutral (like water), or alkaline (like baking soda).
Plants are picky eaters! If the pH is too high or too low, they can’t absorb nutrients properly even if the soil is packed with goodness. For example:
- Blueberries love acidic soil (pH 4.5–5.5).
- Tomatoes prefer slightly acidic (6.0–6.8).
- Cabbage thrives in alkaline soil (7.0–8.0).
Testing your soil’s pH helps you give your plants their favorite “meals” and avoid unhappy, stunted growth.
WHAT IS A pH INDICATOR?
An indicator is like a color-changing detective. It reacts with acids or bases and shifts color to show the pH level. Red cabbage contains natural pigments called ANTHOCYANINS (the same stuff that makes blueberries blue!). These pigments change color depending on whether they’re mixed with something acidic, neutral, or alkaline making it a perfect DIY soil tester.
How to Test Your Soil pH at Home
1️⃣ Chop up some red(purple) cabbage leaves and boil them in water for 10 minutes.
2️⃣ Strain the liquid—you’ll get a purple-colored solution. Let it cool.
3️⃣ Take a soil sample and mix it with some distilled water.
4️⃣ Add some of the cabbage solution and stir. Now, watch for the color change!
Results & What They Mean
🎨 Pink/Red = Acidic soil (low pH, below 7)
🎨 Purple/Blue = Neutral soil (pH around 7)
🎨 Green/Yellow = Alkaline soil (high pH, above 7)
What's next you may be asking, I will be making another post on what to do.
Try this simple test and let me know your results! What color did you get? 🎨🌱
Happy testing 🧪⚗️👩🏿🔬