· SoilSense team
How to Test Soil pH at Home
Soil pH decides whether your plants can actually absorb nutrients. Even rich soil "locks out" iron and nitrogen when it's too acidic or alkaline — which shows up as yellow leaves and stalled growth. Testing takes minutes and tells you exactly what to fix.
1. Probe meter (fastest)
A 3-in-1 soil meter reads pH directionally with no chemicals. Insert the clean probe two-thirds deep into moist soil (never dry soil or water), wait about a minute, and read the dial. Take three readings across a bed and average them. This is our go-to because it also reads moisture and light. See how the pH mode works →
2. Test strips
Mix a soil sample with distilled water, dip a pH strip, and match the color. Cheap and decent for a one-off check, but messier and single-use.
3. The kitchen test (very rough)
Split a soil sample in two. Add vinegar to one — fizzing means alkaline soil. Add baking soda + water to the other — fizzing means acidic soil. No fizz either way suggests near-neutral. It's a fun indicator, not a number.
How to adjust your pH
| Goal | Add |
|---|---|
| Raise pH (less acidic) | Garden lime, wood ash |
| Lower pH (more acidic) | Elemental sulfur, peat moss |
Adjust gradually and re-test after a few weeks — pH shifts slowly. According to university extension guidance, most vegetables perform best between pH 6.0 and 7.0.