What to do if your Citronella (Pelargonium graveolens) has yellow or dry leaves
Citronella (Pelargonium graveolens) with mostly green leaves and isolated yellowing at the edges, along with some lower leaves that are dry, usually indicates mild stress from watering, light, substrate, or natural aging. Follow guidelines for watering, light, drainage, and pruning, and observe the plant for 7–14 days to confirm recovery.
Quick diagnosis
The plant is likely Citronella (Pelargonium graveolens). It shows mostly green leaves with isolated yellowing at the edges and some lower leaves dry or withered. No pests or obvious rot are observed, so the most likely cause is mild stress related to watering, light conditions, substrate problems, or simply the natural aging of basal leaves.
Most likely causes
- Irregular watering: alternating wet and dry cycles that affect older leaves first.
- Inadequate light: either insufficient light (chlorosis) or very intense direct sun (burned edges).
- Compacted substrate or poor drainage limiting root health.
- Natural aging: old basal leaves dry out and accumulate if not pruned.
What to do now (immediate actions)
Watering
- Check the top 2–3 cm of the substrate: water only when it’s dry to the touch.
- Avoid waterlogging: allow excess water to drain and don’t leave the plant sitting in a tray with standing water.
- Adjust frequency according to the season: water less in winter and more in summer or dry indoor conditions.
Light
- Place the citronella in bright, indirect light.
- If it receives direct sun, make it gentle (morning or late afternoon) and avoid strong midday sun, which can cause edge burns.
Substrate and drainage
- Ensure the pot has effective drainage holes.
- If the substrate is very compacted, lightly aerate the top layer with a stick or garden fork.
- Consider repotting in spring into a lighter mix (potting soil with perlite or sand) only if you notice root problems; don’t repot unnecessarily if there are no signs of rot.
Pruning and cleaning
- Remove dry or severely damaged basal leaves with clean scissors to improve air circulation and appearance.
- Avoid drastic pruning: remove only dead or very affected leaves.
Observation and follow-up (7–14 days)
- Watch for the emergence of healthy new growth: it’s a sign the plant is responding well.
- Check the substrate to ensure it’s not waterlogged.
- Look for new spots, signs of rot, or insects; note the plant’s location and watering routine so you can adjust if necessary.
Recovery checklist (what you should see in 1–2 weeks):
- New shoots present or no further yellowing on new growth.
- Substrate without persistent waterlogging.
- No visible spots or signs of pests.
Long-term preventive tips
- Maintain a watering routine based on the surface dryness of the substrate, not a strict calendar.
- Provide bright, indirect light with some gentle sun exposure during less intense hours.
- Refresh the substrate every 1–2 years if you notice compaction or poor drainage.
- Periodically clean away old leaves to prevent accumulation of dead material.
If after 2 weeks you don’t see improvement or soft spots and a rotting smell appear, check the roots and consider repotting into fresh substrate to inspect for root damage.