Updated: July 1, 2023

The Purple Oxalis plant, also known as Oxalis triangularis or False Shamrock, is a beautiful and unique houseplant that adds a pop of color to any indoor space. With its vibrant purple leaves and delicate white flowers, it’s no wonder why this plant has become so popular among plant enthusiasts.

To keep your Purple Oxalis plant healthy and thriving, proper fertilization is essential. Fertilizers provide essential nutrients that the plant needs to grow and flourish. In this guide, we will walk you through the basics of fertilizing your Purple Oxalis plant.

Understanding the Nutritional Needs of Purple Oxalis

Before diving into the specifics of fertilizing your Purple Oxalis plant, it’s important to understand its nutritional needs. Like all plants, Purple Oxalis requires three primary macronutrients: nitrogen (N), phosphorus (P), and potassium (K). These macronutrients play a crucial role in the overall growth and development of the plant.

Nitrogen is responsible for promoting leafy growth, phosphorus aids in root development and flower production, while potassium helps with overall plant health and disease resistance. In addition to these macronutrients, Purple Oxalis also benefits from micronutrients such as iron, manganese, and zinc.

Choosing the Right Fertilizer

When it comes to fertilizing your Purple Oxalis plant, choosing the right fertilizer is key. A balanced liquid fertilizer with equal parts nitrogen, phosphorus, and potassium (such as a 10-10-10 or 14-14-14 formula) is ideal for promoting overall growth and maintaining a healthy plant.

It’s important to note that excessive amounts of nitrogen can lead to excessive leaf growth at the expense of flower production. Therefore, it’s best to use a balanced fertilizer with a lower nitrogen content. Additionally, using a water-soluble fertilizer allows for easy absorption by the plant’s roots.

Fertilizing Schedule

Purple Oxalis plants benefit from regular fertilization during their active growing season, which typically spans from spring to early fall. During this time, you can fertilize your plant every two to four weeks. However, it’s important to adjust the frequency based on the specific fertilizer you are using and the instructions provided by the manufacturer.

During the dormant season, which occurs during late fall and winter, reduce the frequency of fertilization to once every two months. This allows the plant to rest and prepare for its next growth cycle.

Fertilizer Application

When applying fertilizer to your Purple Oxalis plant, it’s important to follow proper application techniques. Always dilute the fertilizer according to the instructions provided on the packaging. Applying concentrated fertilizer directly to the plant can lead to burning of the roots and damage to the foliage.

To apply liquid fertilizer, thoroughly water your plant before application. This ensures that the soil is moist and allows for even distribution of nutrients. Then, mix the diluted fertilizer solution according to the instructions and pour it into the soil around the base of the plant.

Avoid getting fertilizer on the leaves or flowers, as this can cause damage. If any fertilizer does come into contact with the foliage, rinse it off immediately with water.

Signs of Over-Fertilization or Nutrient Deficiency

It’s important to monitor your Purple Oxalis plant for signs of over-fertilization or nutrient deficiency. Over-fertilization can lead to burned leaf edges, wilting, or stunted growth. If you notice these signs, reduce the amount or frequency of fertilizer application.

On the other hand, nutrient deficiencies can manifest in different ways. For example, a nitrogen deficiency may cause yellowing of leaves, while a phosphorus deficiency may result in poor flower production. If you suspect a nutrient deficiency, adjust your fertilization routine accordingly or consider using a specialized fertilizer formulated to address the specific deficiency.

Additional Tips for Healthy Growth

In addition to proper fertilization, there are a few other tips to keep your Purple Oxalis plant healthy and thriving:

  1. Light: Purple Oxalis plants prefer bright, indirect light. Place them near a north or east-facing window to provide them with the right amount of light.

  2. Watering: Keep the soil evenly moist but avoid overwatering, as it can lead to root rot. Allow the top inch of soil to dry out before watering again.

  3. Humidity: Purple Oxalis plants thrive in moderate humidity levels. Consider placing a tray filled with water near the plant or using a humidifier to maintain adequate moisture.

  4. Temperature: These plants prefer temperatures between 60°F and 75°F (15°C – 24°C). Avoid exposing them to extreme temperature changes or drafts.

By following these guidelines and providing your Purple Oxalis plant with the right nutrients, you can ensure its health and beauty for years to come. Happy fertilizing!