Chalky (Calcareous) Soil
Contains free calcium carbonate; often shallow and stony; drains well but is alkaline and can lock micronutrients.
🧱 Texture, Drainage & Fertility
Texture: varies; can be loamy to stony
Drainage: good
Fertility: low to moderate
Organic Matter: low
Tendencies: iron/zinc/manganese deficiency, thin topsoil
🧪 pH
Typical pH Range: >7.2 (alkaline)
✅ Best Suited For
- Lavender, rosemary, thyme
- Olives, figs (with feeding)
- Many Mediterranean ornamentals
⚠️ Not Ideal For
- Acid‑loving plants (blueberry, azalea)
🛠️ Amendments & Improvements
- Add large amounts of compost and mulch to build topsoil
- Use chelated micronutrients where deficiencies show
- Acidify planting pockets for particular plants
🪴 Recommended Container Mix
40% compost, 40% coco coir, 20% perlite; use slightly acidic irrigation or add sulfur for acid‑preferring plants.
🔍 Diagnostics
Hand Test: May feel gritty; effervesces weakly with vinegar if carbonate present.
Jar Test: Varies; white specks of carbonate possible.
🐛 Common Issues & Fixes
- Chlorosis (yellow leaves with green veins): Apply chelated iron and organic matter; avoid over‑liming.
💡 Care Tips
- Plant tolerant species or use containers with custom mix
- Mulch constantly to develop darker, richer topsoil
🌦️ Malaysia Notes
Less common in many Malaysian lowlands; if present, rely on containers or heavy organic amendment for sensitive crops.
Note
Use these profiles as practical guides. Local site conditions vary—observe water infiltration, plant responses, and adjust amendments accordingly.