puusahoja

Puusahoja refers to the practice of using wood ash, a byproduct of burning wood, as a natural fertilizer or soil amendment. Wood ash contains essential nutrients such as potassium, calcium, and trace minerals like magnesium and phosphorus, which can benefit plant growth when applied correctly. It is particularly useful for slightly acidic soils, as it helps raise pH levels, though overuse can lead to soil alkalinity, which may harm certain plants.

The application of wood ash is commonly associated with organic gardening and sustainable farming practices. It can be spread directly onto garden beds, mixed into compost, or used as a mulch. However, caution is advised when using ash from treated or painted wood, as these may contain harmful chemicals. Only untreated, natural wood ash should be used for agricultural purposes.

In addition to its role as a fertilizer, wood ash can also be used for pest control. The high pH and mineral content can deter certain slugs, snails, and insects. Some gardeners also use it to improve soil structure and water retention in sandy soils.

While wood ash offers several benefits, it should be applied sparingly and in moderation. Excessive use can disrupt soil chemistry, making nutrients less available to plants. Testing soil pH levels before and after application is recommended to ensure balanced soil conditions. Proper storage of wood ash is also important, as it can absorb moisture and form a paste-like substance when exposed to rain.