Ash is frequently used as a fertilizer for gardens, offering a natural, economical, and ecological solution. However, not all plants benefit from wood ash. In this article, we’ll reveal which plants should avoid this fertilizer and how to use it properly.
The Role of Ash in Gardening
Ash acts as a natural organic fertilizer, improving soil structure by reducing acidity and enhancing the activity of beneficial microorganisms. While it can be advantageous, it’s important to note that it’s not suitable for all plants.
Where and Why to Use Wood Ash?
Wood ash is rich in minerals and can positively affect soil quality by deterring harmful species like aphids and slugs. It also helps keep unwanted insects at bay, making it a popular choice among gardeners.
Benefits of Ash in Compost
Wood ash contains essential components like potassium, calcium, magnesium, and phosphorus, which promote healthy plant growth. Adding small quantities to your compost can enhance its nutrient content.
How to Use Fireplace Ashes as Fertilizer
When using ash as fertilizer, it’s crucial to apply it sparingly. Excessive use can disrupt soil balance and hinder plants’ absorption of vital minerals. Aim for a maximum of 100 grams of ash per square meter per year. For effective application, you can mix this with 10 liters of water and water your plants in the spring.
Which Plants Dislike Ash?
Since wood ash reduces soil acidity, plants that thrive in acidic conditions do not respond well to it. Some plants to avoid fertilizing with ash include:
- Azaleas
- Hydrangeas
- Heather
- Zinnias
- Roses
- Conifers (like junipers, spruces, and firs)
Vegetable Garden Plants to Avoid
Certain fruits and vegetables also do not thrive with ash:
- Radishes: Prefer moderately acidic soils (pH 6-7.5); alkaline soil can lead to yellowing.
- Sorrel: Thrives in slightly acidic conditions and needs moisture.
- Watermelon: Requires pH 6-7.5; lack of moisture can hinder growth.
- Cornflowers and houseplants (like violets and orchids) flourish in acidic soils and can suffer from ash.
Other Vegetables and Fruits to Keep Ash Away From:
- Potatoes
- Sweet corn
- Peppers
- Eggplants
- Rhubarb
- Parsley
- Sweet potatoes
Fruits like apples, pears, birches, red maples, blueberries, and raspberries also dislike wood ash.
To maintain a healthy garden, avoid using wood ash on the plants and crops mentioned above. This will help ensure their optimal growth and vitality!
