Dividing Bulb Plants: Complete Guide by Bulb Type

Why Divide Bulbs?

Bulb division produces new plants for expansion, sharing, or relocation. Overcrowded bulbs bloom sparsely—division restores vigor. Sparse blooms from previously floriferous plantings signal division time.

Five Bulb Types & Division Methods

True Bulbs (e.g., lilies): Separate smaller basal bulblets from mother bulb. Remove outer scales from basal plate, dip ends in rooting hormone, plant immediately.
Corms: Not true bulbs. Renew via new corm + cormels atop old corm. Separate healthy new corms and cormels from original.
Tubers: Increase size and growing points. Cut large tubers into sections, each with at least one growing point.
Rhizomes: Growth points at sides. Break apart at natural divisions, ensuring each section has a growth point.
Tuberous Roots: Multiple growing points. Daylilies form distinct plants—pull apart (fall/summer during growth). Dahlias harder: cut clumps so each root has growth bud (early spring pre-planting).

Knowledge Application

Identify your bulb type (guides or purchase info). Proper division reduces overcrowding, restores vibrant blooming. Invest time learning—expertise comes from study.