🌿 Oxalis vulcanicola ‘Yellow Splash’ Care Sheet
Common Name: Yellow Splash Oxalis
Botanical Name: Oxalis vulcanicola ‘Yellow Splash’
Plant Type: Perennial groundcover or ornamental filler
Growth Habit: Low-growing, spreading, mounding
Hardiness Zones: USDA 9–11 (can be overwintered indoors in colder zones)
 
☀️ Light
Bright indirect light to full sun.
In morning or filtered sun, variegation becomes more vibrant.
Too little light = duller green leaves, less yellow contrast.
 
🌡️ Temperature
Thrives between 18°C to 30°C.
Not frost-hardy – protect from cold snaps below 5°C.
Can be grown outdoors in warm climates or brought indoors for winter.
 
💧 Watering
Keep soil evenly moist but not soggy.
Allow the top 1–2 cm of soil to dry out slightly between waterings.
Reduce watering slightly in cooler months.
 
🪴 Soil
Prefers well-draining, slightly acidic to neutral soil.
A mix of potting soil with perlite or coarse sand works well.
 
🌬️ Humidity & Air Circulation
Tolerates average humidity.
Avoid overly damp, stagnant air to prevent rot.
 
🌸 Flowers
Produces small, bright yellow flowers in warm weather.
Blooms look striking against the green-and-yellow foliage.
 
✂️ Maintenance
Pinch back stems to encourage bushiness.
Trim leggy growth or spent flowers to maintain shape.
Can be lightly fertilized monthly in spring and summer with a balanced liquid feed.
 
🌱 Propagation
Easy to propagate by division or stem cuttings.
Also spreads naturally from underground rhizomes in ideal conditions.
 
🪰 Pests & Problems
Generally pest-free but watch for:
Aphids, mealybugs (especially indoors)
Root rot from overwatering
Good air flow and careful watering prevent most issues.
 
🌿 Ideal For:
Open terrariums
Edging in warm-climate gardens
Brightening containers or mixed planters
Hanging baskets or terrariums with ample light
Indoor plant feature near a sunny window