My grandfather recently passed away and I was able to keep a large piece of coal (Yes, a large "lump" of coal) that he personally mined for when he was a kid. I was wondering if it would be an okay idea to display this large piece of coal in my garden as a tribute to him, but I am not sure how this could affect the flowers I already have planted. I currently have Marigolds, Petunias, and roses planted.
I am a beginning gardener so all feedback would be appreciated! Thank you!
This sounds like a great idea and important to you. Coal is carbon. I doubt if there will be a problem. I think it is a safe bet to gamble on the impurities. The most common one would be sulphur which is an element commonly added to gardens to make them more acid.
"Good decisions come from experience. Experience comes from bad decisions." ... Mark Twain