Overwatering and bulb rot
Wet soil plus yellow, mushy leaves points squarely at overwatering — the fastest way to lose a Purple Shamrock.
Diagnosis
Overwatering and bulb rot
What's happening
Oxalis triangularis grows from clusters of small, fleshy bulbs that need air around them. When the mix stays soggy, those bulbs and their roots can't take up oxygen, so they soften and rot. The plant responds by yellowing and collapsing its oldest stems first, often with a soft, translucent look right at the base.
How to fix it
Stop watering at once and let the mix dry well down. Tip the plant out and check the bulbs — firm and pale is healthy, so cut away any soft, brown, mushy bulbs and roots with clean scissors. Repot the salvageable bulbs into fresh, airy, fast-draining mix in a pot with drainage holes, and water only when the top inch or two feels dry. Purple Shamrock is far happier slightly dry than wet.
What fixes it
- A soil moisture meter — A moisture meter removes the guesswork — only water when it reads dry an inch or two down, so the bulbs never sit wet.
If that doesn't fix it
This is general guidance based on common symptoms; individual plants vary.
Read the full Purple Shamrock care guide →
Reviewed June 2026 · how we check this