yellow stems on Huernia
Quick answer
If your Huernia has yellow stems, the most likely cause is: On Huernia primulina, exposure to cold winter windowsill conditions causes the succulent stems to yellow first and then blacken, especially when the plant is shut behind curtains at night and chill pools against the glass, which Pilbeam's troubleshooting panel flags as the typical cool-season failure mode of this stapeliad.
Start here:
- 1. Move the plant to a warmer place, above 40°F (4°C), so the stems are not held against a cold single-pane window overnight.
- 2. Water fortnightly in summer, weekly in hottest weather, then tail off in autumn and keep dry in winter if the room sits under 55°F (13°C), so roots are not cold and wet while the stems are already chilled.
Why Huernia gets yellow stems
Huernia
On Huernia primulina, exposure to cold winter windowsill conditions causes the succulent stems to yellow first and then blacken, especially when the plant is shut behind curtains at night and chill pools against the glass, which Pilbeam's troubleshooting panel flags as the typical cool-season failure mode of this stapeliad.
How to reverse yellow stems on Huernia
- 1
Move the plant to a warmer place, above 40°F (4°C), so the stems are not held against a cold single-pane window overnight.
- 2
Water fortnightly in summer, weekly in hottest weather, then tail off in autumn and keep dry in winter if the room sits under 55°F (13°C), so roots are not cold and wet while the stems are already chilled.
Keep yellow stems off this Huernia
Keep Huernia in a brightly lit, airy spot where winter temperatures hold at or above 50°F (10°C) — Pilbeam notes 'Minimum 40°F (4°C) but 50°F (10°C) is better' — and withhold water through winter so cold-damaged stems never sit in damp compost.