Dispose of wood ash: where does it belong? - FFT Ecology News

Dispose of wood ash: where does it belong?

A lot of ash is often left over when heating with the fireplace. However, you do not have to dispose of these in the residual waste. Because it can be particularly useful for your garden.

overview
Which ash is suitable for fertilization?
How do I use ashes as fertilizer?
Dispose of wood ash
Can fireplace ash be put on the compost?

Once the cozy warmth has subsided, ash and soot are often left behind. But the expensive fuel that has now been burned is far too good to simply dispose of. There is still a lot of energy in it, which your garden will be happy about.
Ash is a good fertilizer
Ash is not a waste product. Despite the burning process, it contains many minerals and nutrients. Depending on the type of wood, it is rich in

Calcium,
Potassium,

Lime,
phosphate
Magnesium as well
To demand
and is therefore very suitable for fertilization. The calcium content in particular is very high at 30 to 45 percent.
Since wood ash is basic, you can even use it to neutralize acidic soils. It is best suited for clay or loamy soil.

Which ash is suitable for fertilization?Not all ashes from the chimney are suitable for fertilizing the garden. You should not use the residues from burnt coal or briquettes. Because when it is burned, the non-combustible and non-volatile substances in the coal remain in the ashes. Heavy metals such as cadmium, chromium and lead as well as pollutants accumulate in the ash and reach high concentrations. You shouldn’t use the leftover charcoal either. It can contain residues of fats and acrylamide.
AttentionThere is a lot of calcium in wood ash in the form of quicklime. If overdosed, it can cause leaf burns and damage the flora on sandy soils.
Ashes from untreated wood or black and white printed newspaper in small quantities are mainly suitable as fertilizer. Residues from burned, varnished wood or colored newspaper is also contaminated with pollutants. This can harm the plants. Rhododendrons in particular are severely damaged by fertilizing with wood ash.
InfoTrees also absorb pollutants when they grow in the forest, which then remain in the ashes when they are burned. The residues in the fireplace are therefore not entirely harmless, even if you use untreated wood.

How do I use ashes as fertilizer?
Ash can be used for garden maintenance immediately after it has cooled down. If you use them as fertilizer, you shouldn’t use more than 100 milliliters per square meter annually. This amount is enough to supply the soil with sufficient nutrients. If you put more ash on your bed, you run the risk of over-fertilization. The result: the plants become sick, susceptible to fungi and pests and perish. In addition, if you use too much fertilizer, you run the risk of exposure to health hazards. Because if you consume your home-grown fruit or vegetables that have been fertilized with the leftovers, the ash can heavily pollute them with heavy metals.
AttentionBefore fertilizing with ash, check to see what nutrients your soil is lacking. Burned wood contains a lot of potassium. Only when a potassium deficiency is detected should you fertilize with ashes.

Dispose of wood ash: Please in the residual waste!
If you want to properly dispose of the remains from your fireplace, put the ashes in the general waste. In this way you can prevent the environmentally harmful substances from getting into the ground or water.
To avoid dust nuisance when throwing it away, put the ashes in a garbage bag. The ashes should have cooled down completely. Otherwise there is a risk that the garbage bag will melt or even the entire garbage can will catch fire.
AttentionFireplace ash must not be disposed of in the organic waste bin or in organic waste.

Can fireplace ashes be put on the compost?
Here, too, the following applies: Only put the combustion residues from your chimney on the compost if they do not contain any harmful substances. Otherwise these can get into your plants and thus into your vegetables and fruit through the fertilization with the compost. In addition, you shouldn’t put too much wood ash on top of the compost. Since it is basic, it can destroy the microorganisms that work there.
Compost: You should only add a small amount of wood ash to the compost. Otherwise, you can harm the microorganisms that work there. (Source: schulzie / Getty Images)
Then cover the wood ash with a layer of green waste. This will prevent the dust from spreading in the area.