Iron Cross Oxalis
Oxalis tetraphylla
Also known as: Iron Cross Plant, Shamrock Plant, Good Luck Plant
Oxalidaceae
If your pet has eaten this plant, call ASPCA Poison Control: (888) 426-4435 — available 24/7.
Last reviewed: June 2026 · Source: ASPCA Animal Poison Control
Four-leafed clover lookalike with a distinctive dark purple cross marking at the center of each leaf cluster.
Toxicity
Source: ASPCA Animal Poison Control Center. Always consult a veterinarian if your pet ingests any plant.
Care Guide
Pot Size
Frequently Asked Questions
Is Iron Cross Oxalis toxic to cats?↓
Yes, Iron Cross Oxalis (Oxalis tetraphylla) is toxic to cats. If your cat ingests any part of this plant, contact your veterinarian or the ASPCA Animal Poison Control Center (888-426-4435) immediately.
Is Iron Cross Oxalis toxic to dogs?↓
Yes, Iron Cross Oxalis is toxic to dogs. Symptoms may include vomiting, drooling, or lethargy. Contact your vet immediately if your dog chews or eats this plant.
How often should I water Iron Cross Oxalis?↓
Water Iron Cross Oxalis every 7–10 days. Water when the top inch of soil feels dry to the touch.
How much light does Iron Cross Oxalis need?↓
Iron Cross Oxalis thrives in bright indirect light, such as near a window with filtered sunlight. It is forgiving and adapts to a range of light conditions.
What size pot does Iron Cross Oxalis need?↓
Use a pot between 4″ and 6″ in diameter. When repotting, choose a pot only 1–2″ larger than the current one — too much space retains excess moisture and can lead to root rot.