How does eucalyptus wood’s tannin content affect soil pH in outdoor flower pots?

Eucalyptus wood is known for its high tannin content, which can significantly impact soil pH when used in outdoor flower pots. Tannins are natural compounds that leach into the soil over time, often lowering the pH and making the soil more acidic. This acidity can benefit acid-loving plants like azaleas or blueberries but may harm plants that prefer neutral or alkaline conditions.

To manage this effect, gardeners can monitor soil pH regularly and amend it with lime or other alkaline materials if necessary. Alternatively, using a liner or sealant for eucalyptus wood pots can reduce tannin leaching. Understanding these dynamics helps ensure healthy plant growth and optimal soil conditions in your garden.