Based on the provided information, the simple answer is no.
While some types of ash, like wood ash from natural sources, can sometimes be used in gardens in moderation to add nutrients and adjust soil pH, charcoal ashes are generally not recommended for plants.
Why Charcoal Ash is Not Recommended for Plants
According to information from August 7, 2007, specifically addressing the use of charcoal ashes, it is advised to "please do not use ashes from your charcoal." The reasoning provided is that although it might seem like a natural thing to do, the chemicals used to make charcoal briquettes are "not healthy for plants."
Charcoal briquettes, unlike pure wood charcoal or ash from untreated wood, often contain various additives and binding agents to help them hold their shape and burn consistently. These additives can include:
- Binders: Such as starch, lime, or borax.
- Fillers: Materials that add bulk.
- Ignition aids: Chemicals that help the briquettes light easily.
- Other potential chemicals depending on the specific manufacturing process.
When these briquettes burn, the residues of these chemicals are left in the ash. Introducing these residues into your soil can potentially harm plant roots, disrupt soil chemistry, or introduce undesirable substances into your garden environment.
Best Practices for Garden Ash
If you are considering using ash in your garden, it's crucial to know the source. Ash from untreated, natural wood (like fireplace ash from logs) is very different from charcoal briquette ash. Even then, wood ash should be used sparingly and cautiously, as it is very alkaline and can drastically change soil pH.
- Avoid: Ashes from charcoal briquettes, treated wood (like lumber), painted or stained wood, particleboard, or trash fires.
- Consider (with caution): Ash from burning only clean, untreated wood. Always test your soil first and apply wood ash sparingly if needed, focusing on plants that benefit from higher pH or potassium.
In conclusion, sticking to the advice from the provided reference, it's best to avoid using charcoal ashes in your garden entirely to protect the health of your plants and soil.
