Good advice, CJR. Since my stumps are nearly flush with the ground, I think my three inch deep holes will work out. When dry, I plan to soak holes with kerosene and briquettes and light it. Assuming it burns below grade, and I think it will, I'll then clean out the hole with the leaf blower, fill with high nitrogen fertilizer and let it go. If it's below grade, so I don't hit with the mower, I'm good. If grass grows on top, that would be even better.