I am a bbq lover and all the times I find myself throwing ash , I was googling on 'How to recycle bbq ash and found it can be a killer for weed. on the website it says
BBQ ash can be repurposed as a fertiliser or weed suppressant, by simply adding it to soil. This adds potassium carbonate, which is a helpful nutrient to many plants. Ash can stop weeds growing by increasing the pH level of the soil.
If this is true what is quoted above and how should I use the ash as it might fly and be more harmful as I m trying to grow grass as well.