Why Cape Sundew Flowers Fail to Open: Light, Pot Size, or Water Quality?

Why Cape Sundew Flowers Fail to Open: Light, Pot Size, or Water Quality?

Lynda's D. capensis sent up multiple spikes late summer/fall, but buds died before opening. Plant healthy, dewy, catching bugs. Grown on north-facing deck with good morning/afternoon sun, in sphagnum, RO well water. SW Washington, ~1000 ft elevation. Brought in late (post-Halloween frost). Winter: cool house, weak fluorescent light.

Troubleshooting Checklist

• Repot in fresh soil, larger pot if crowded—boosts root oxygenation.
• Verify full sun location: "Can you grow a tomato there?" If not, not bright enough.
• Always keep shallow water tray.
• Test RO output TDS—mineral buildup affects sundews more than pitcher plants.
• Share summer photos for site assessment.

Key Takeaway

Failed D. capensis blooms often mean insufficient light, root crowding, or mineral creep in RO water. Repot, verify sun, test TDS.