Oxalis ‘Iron Cross’ (Bulbs)

Four-Leaf Sorrel

Family

Oxalidaceae

Origin

South America

Description

Oxalis is a slow-developing perennial known for its distinctive shamrock-like leaves and five-petaled flowers that resemble cups or bowls, opening exclusively in sunlight. It typically reaches a height of 6 to 10 inches (15 to 25 cm) and spreads equally wide.

Oxalis ‘Iron Cross’ features unique four-lobed leaves that resemble a four-leaf clover. Each leaflet displays a bright green color with a deep maroon to purplish-brown center, creating a distinctive cross pattern that gives the plant its name. The leaves have a gentle cup shape and a soft, velvety feel. This variety produces delicate pink to magenta five-petaled flowers that rise just above the foliage on slender stems. Flowering typically occurs in warm seasons, from late spring through summer.

 

Oxalis Iron Cross bulbs produce pink flowers along with distinctive four-leaf foliage featuring red markings. They flower from December to March in plains and from January to April in hills. Plant bulbs between October and November in both plains and hills.

Environment

Oxalis ‘Iron Cross’ grows best with several hours of sunlight daily, ideally receiving afternoon shade. Plants placed in shaded areas tend to thrive more effectively. While the leaves may wilt slightly under afternoon sun, they usually recover as temperatures cool later in the day. Although tolerant of sunlight, leaf withering and drop can occur during midsummer. The plant prefers cooler spring conditions for optimal growth.

Well-draining, slightly acidic soil is essential; adding coffee grounds nearby can enhance soil acidity. Incorporating ample organic matter or compost before planting bulbs supports healthy development. Oxalis requires consistently moist but well-drained soil and should not be kept in overly wet conditions to prevent bulb rot. Avoid underwatering, especially during summer.

Regular fertilization with a balanced plant food at half strength throughout the growing season is recommended.

In India, the sowing and flowering periods for Oxalis vary by region.

Plains (North, West, Central, East, South India):

• • Sowing Season: September to November

  • Flowering Season: October to February

Hilly and Mountain Regions (Himachal, Uttarakhand, Northeast Hills)

• • Sowing Season: April to June

  • Flowering Season: May to September

Landscape Use

Oxalis are good for naturalizing, for growing in a rock garden, trough, or raised bed, or as houseplants. Some species are very invasive.