For 15-year-old dracaenas (corn plants) reaching 12 feet, cutting back and propagating is straightforward. Three reliable methods work for the severed stems:
Cut stems into sections, let ends callus briefly, then insert into moist peat-based mix. Keep warm and slightly moist for about a month.
Cut stems into 3–4 inch sections, each with at least one node. Lay horizontally on moist mix, half-buried. New shoots emerge from nodes. Purdue guide has details.
Root the top while still attached. Wound the stem, pack with damp sphagnum moss, wrap in plastic. Once roots form, cut below and pot. Texas A&M instructions.
All three methods work; choose based on how many new plants you want and your patience level.
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