It’s invasive and I need it gone – False spirea

I only have pics of leaves now. When it blooms it has flowers similar to an asilbe. The roots run underground and the plant pops up everywhere. The garden centre I got it from said it was an astilbe; but,…

False Spirea

I live near Philadelphia, Pa. and have a False Spirea that blooms in August. When can I start to prune it and trim it back; it’s starting to get overgrown?.…