- Should you top a tree to keep it within bounds?
- Will a mulch of Ponderosa pine needles acidify the soil?
- Should you always add compost to a planting hole?
- What about encouraging native bees with a bee house?
A lot of what gets passed from gardener to gardener sounds like good advice, but has no benefit—or can even be harmful. Which practices are supported by research? Which should we forget about?