Diagnosing Chronic Cape Sundew Stunting: Light, Not Minerals

The Real Culprit: Insufficient Light

Despite good water (distilled), soil (Black Gold peat, Whitney Farms perlite/sand), and isolation from butterwort trays, your D. capensis shows chlorotic, pale, stunted growth—classic low-light symptoms. Butterworts tolerate shade; sundews don’t.

Lighting Fix

• 13W plant-spectrum tubes are too dim (low lumen output).
• Upgrade to 24-inch, two-tube fixtures with cool-white bulbs (highest lumen available).
• Position plants within 3 inches of tubes.
• 14-hour timer.

Water Management During Recovery

Keep tray water lower (~1 inch) to reduce fungal risk while plant recovers.

Outdoor Transition

Moving outside (full sun) helps but expect leaf burn on shade-grown leaves—trim them. Butterworts must stay indoors (can’t handle full sun).

Soil Brands

Black Gold peat and Whitney Farms perlite/sand are fine. Avoid Miracle-Gro bagged peat (contains fertilizer).