Oxalis latifolia: Wood Sorrel
Oxalis latifolia: Wood Sorrel
Oxalis latifolia (Broadleaf Wood Sorrel) — a charming but sometimes invasive plant known for its clover-like leaves and pink to purple flowers. The leaves fold up at night or in cloudy weather — a behavior known as nyctinasty — making it a fascinating plant to observe!
Overview
- Common name: Broadleaf Wood Sorrel, Pink-sorrel
- Scientific name: Oxalis latifolia
- Family: Oxalidaceae
- Type: Herbaceous perennial
- Native to: Central and South America
- Growth habit: Forms mats or clumps via underground bulbs and stolons
Light Requirements
- Ideal: Partial shade to full sun
- In cooler climates, it thrives in full sun.
- In hot regions, it prefers filtered sunlight or morning sun with afternoon shade.
Soil Conditions:
- Type: Well-draining, loamy or sandy soil
- pH: Slightly acidic to neutral (around 6.0–7.0)
- Tip: Add organic matter like compost to improve soil structure and fertility.
Watering
- Keep soil evenly moist, especially during active growth (spring–summer).
- Avoid waterlogging — bulbs may rot in soggy soil.
- Once established, O. latifolia tolerates some drought.
Fertilizing
- Generally, not heavy feeders.
- Apply a balanced, diluted fertilizer (10-10-10) every 4–6 weeks during the growing season if growth is slow.
- Stop fertilizing in winter when the plant goes dormant.
Pruning & Maintenance
- Remove spent flowers and yellowing leaves to promote new growth.
- Thin crowded patches to maintain airflow and reduce disease.
- If grown in pots, divide and replant bulbs every 2–3 years.
Propagation
- By bulbs: The easiest method — separate and replant bulb clusters in spring.
- By division: Split clumps during dormancy or early growth.
- By seed: Possible, but slower and less reliable.
Invasiveness Warning
- Oxalis latifolia spreads aggressively through bulbs and stolons.
To control spread:
- Grow in containers or raised beds.
- Regularly dig out stray bulbs and roots.
- Use a root barrier in garden beds.
- Avoid discarding bulbs in compost.
Pests & Diseases
- Generally resistant, but may occasionally suffer from:
- Aphids or spider mites (control with neem oil or insecticidal soap).
- Root rot from overwatering.
- Powdery mildew may appear in humid, crowded conditions. Improve ventilation to prevent it.
Seasonal Care
- Spring/Summer: Active growth — water regularly and feed lightly.
- Autumn: Gradually reduce watering as growth slows.
- Winter: May go dormant; allow soil to dry slightly and protect from frost in cold climates.
