Mystery Plant Identified: It's Likely an Oxalis (Shamrock)

Your description—spade-shaped leaves, light green with darker edges, vining habit, and pieces that regenerate when stuck in soil—points strongly to Oxalis, commonly called shamrock or wood sorrel. With many varieties (green, purple, variegated), a quick image search for "Oxalis houseplant" should confirm the ID.

Oxalis Care Basics

• Light: Bright indirect to a few hours of gentle morning sun. Avoid harsh afternoon rays.
• Water: Keep soil lightly moist during active growth; let top inch dry between waterings. Reduce in dormancy (see below).
• Dormancy: Many Oxalis go dormant periodically—leaves yellow and die back. This is normal. Stop watering, store pot in cool, dark place for 1–3 months, then resume care to trigger regrowth.
• Propagation: Exactly as you observed—broken stems root easily in moist soil or water.
• Toxicity: Oxalic acid makes them mildly toxic to pets if eaten in quantity.

If It's Not Oxalis

Note how your plant differs (leaf shape, color pattern, flower description) or email a clear photo to a plant expert for precise ID and tailored care.