Dividing Hardy Gladiolus Clumps in Zone 5: Fall Transplanting vs. Winter Storage

Why Concrete Heat Allows Overwintering

Pool foundation radiates enough heat to keep soil above freezing at corm depth.

Every 3–4 years, dig clumps. Separate corms. Discard old, soft, or diseased ones.

Keep pea-sized cormels and larger cormlets. They'll bloom in 1–2 years.

Plant near foundations or mulch heavily with straw for winter insulation.

Perennials: Repotting Mature Sarracenia 'Dana's Delight': Wait Until Spring to Divide; Starting Hostas from Bare Roots: Patience Pays Off; Ixora in Coastal SC (Hilton Head): Will It Return?; Reviving 20-Year-Old Coneflowers in St. Louis; When to Divide Toad Lilies (Tricyrtis) in Zone 6; Dividing Creeping Phlox and Fiddle Leaf Ferns: Best Times for Zone 4 Gardens; End-of-Season Care for Portulaca (Moss Rose); Dividing Unknown Perennials: Dig Whole, Split After Bloom; Dividing Hostas: When and How; Preventing Gladiolus Stems from Flopping Over

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