The Hori hori knife lives up to its reputation. Since purchasing, it’s become my go-to tool. It’s terrific for digging planting holes in difficult (and easy) soil, for weeding, for planting.
I recently used it to saw through and dig up a big iris clump. Because of its manoeuvrability, I ended up with 75 great pieces of iris with good fresh rhizome attached. The serrated edge helped with cutting through.
Thoroughly recommend!