Answer: Ivy should root readily if you cut short pieces with at least one node (leaf scar). This leaf scar is where new root will be produced. You can either sink the cutting into moist potting soil with the node beneath the soil, or lay the cuttings on top of moistened potting soil and bury it half-way (with the node touching the soil on the bottom but exposed to the air on top. The key is to keep the soil moist but not soggy wet. You can also root tip cuttings with at least one node. The plastic bag method is simply a homemade greenhouse which helps hold moisture and keeps the cutting from drying out. You'll want to leave the top open so excess moisture can escape. Hope this information helps!
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