Plum Crazy Oxalis (Oxalis triangularis)

Plum Crazy Oxalis (Oxalis triangularis), also known as Purple Shamrock or False Shamrock, is a stunning ornamental plant known for its deep purple, triangular leaves and delicate white or pale pink flowers. It’s a relatively easy plant to care for and can be grown both indoors and outdoors in the right climate. Here’s a care guide for your Plum Crazy Oxalis:

1. Light Requirements:

Bright, indirect light is ideal for Plum Crazy Oxalis.
While it can tolerate some direct sunlight, too much exposure may cause the purple color to fade.
In low light conditions, the plant may become leggy and not bloom as much.

2. Watering:

Keep the soil slightly moist, but do not let it stay soggy.
Water when the top inch of soil feels dry to the touch.
Ensure the pot has good drainage to avoid waterlogging the roots.
During its dormant period (usually in the winter), reduce watering significantly. The plant may go through a natural rest phase, and it will not need as much water.

3. Humidity:

Oxalis plants prefer moderate humidity.
While they do fine in average household humidity, they will thrive with higher humidity, especially during the growing season.
To increase humidity, you can mist the plant occasionally, use a humidity tray, or place a humidifier nearby.

4. Temperature:

Ideal temperatures range between 60°F to 75°F (15°C to 24°C).
It’s sensitive to cold temperatures, so avoid placing it in areas with drafts or temperatures below 50°F (10°C).
During the winter months, it may go dormant, where its growth slows and the plant might appear to “die back.”

5. Soil:

Use well-draining soil that retains some moisture but doesn’t become waterlogged.
A standard houseplant potting mix works fine, but you can improve drainage by mixing in some perlite or sand.
Make sure your pot has adequate drainage holes to prevent root rot.

6. Fertilizing:

Fertilize with a balanced liquid fertilizer once a month during the growing season (spring and summer).
Reduce or stop fertilizing in the fall and winter when the plant is dormant.
Over-fertilizing can cause the plant to grow too quickly and lose its vibrant color, so always follow the recommended dosage.

7. Pruning:

Prune away any yellowing or dead leaves to keep the plant looking neat.
If the plant becomes leggy, you can trim back the stems to encourage a bushier appearance.
Cutting back the plant at the end of its dormant period (if needed) can also help stimulate new growth in the spring.

8. Repotting:

Repot your Plum Crazy Oxalis every 1-2 years or when it outgrows its pot.
When repotting, choose a pot that is 1-2 inches larger in diameter than the current pot.
Repot during its active growing season (spring or early summer) for the best results.

9. Pests and Diseases:

Oxalis is generally pest-resistant, but it can occasionally be affected by aphids, mealybugs, or spider mites.
If pests are noticed, treat the plant with insecticidal soap or neem oil.
Ensure the plant has good airflow to help prevent fungal issues, such as powdery mildew.

10. Dormancy:

Oxalis plants go through a dormant period where they may lose some or all of their leaves. This is a normal part of their growth cycle.
During dormancy, reduce watering significantly, and the plant will rest and rejuvenate.
In early spring, new shoots will start to appear, signaling the start of the growing season.

11. Growth and Size:

Plum Crazy Oxalis typically grows to about 12-18 inches (30-45 cm) tall and wide, but its size can vary depending on growing conditions.
The purple triangular leaves and delicate flowers make it a great ornamental plant for both indoors and outdoors (in zones 6-10).

12. Propagation:

Bulb division is the most common method of propagation for Oxalis.
During the dormant period, you can gently remove the bulbs from the soil and divide them.
Replant each bulb in its own pot with fresh soil.
You can also propagate through leaf cuttings, but this method can be more challenging.

13. Winter Care:

If your Plum Crazy Oxalis is grown outdoors and you live in a region where it gets cold, you may need to bring the plant indoors during the winter.
Indoors, it will go into dormancy, and you may notice the leaves die back. Just reduce watering, and the plant should bounce back in the spring.

Plum Crazy Oxalis is a gorgeous and relatively low-maintenance plant with its rich purple leaves and delicate blooms. It’s a great choice for adding a splash of color to your home or garden, and with the right care, it will reward you with vibrant foliage and charming flowers year after year.