How to Plant Spring-Flowering Bulbs for Maximum Impact

Plant hardy bulbs in fall before soil freezes—early enough for roots to establish before deep cold. In mild climates, planting can continue until Thanksgiving or Christmas; late-planted bulbs root in spring and bloom later, then normalize next year. Water after planting to stimulate roots.

Depth rule: plant so the bulb’s bottom rests at 2½ times its diameter. In sandy or well-drained soil, go 1–2 inches deeper for longevity and rodent deterrence.

Related: Planting Depth Chart | Best Bulbs for Spring Slide Show

For best effect, plant in large drifts, not single file. Use a garden spade (not a bulb planter) to dig wide holes or curving trenches; set bulbs side by side in groups no smaller than a dinner plate.

Layering: Plant different bulbs at different depths in the same hole for simultaneous or sequential bloom. Example: 6-inch hole, Dutch hyacinths at bottom, cover lightly, then grape hyacinths at 5 inches. They bloom together; grape hyacinth foliage appears in fall, marking the spot.

Interplanting: Mix bulbs with perennials. As bulb foliage fades, perennials grow up, hiding yellowing leaves. Works in formal and informal gardens.