Soil pH requirements:
green with Burgundy
6-12 in. (15-30 cm)
12-15 in. (30-38 cm)
USDA Zone 8a: to 10b
Sun to Partial Shade
Late Spring/Early Fall
6.1 to 7.8
|Oxalis tetraphylla (often still traded under its syn. O. deppei) is a bulbous plant from Mexico. A common name is “Iron Cross”, after a famous cultivar; it is also known as “lucky clover”, and in a wild or feral state as four-leaf sorrel or, least ambiguously, four-leaved pink-sorrel.
It has leaves divided into four and has been called “lucky leaf” and even “four-leaf clover”, but it is not a true clover. Related to the common wood-sorrel (Oxalis acetosella), it is commonly used as an ornamental plant. It is also edible, the flowers and leaves having a sharp lemon flavor. However, since the oxalic acid in the plant can interfere with the absorption of certain nutrients in the body, especially calcium, too much can be harmful.
Hardiness: Zones 8–9. If planted in early spring it will grow and flower throughout spring and summer. Some bulbs can survive a cold winter but in areas with frost they should be kept in a cool dry place over winter and replanted in the spring.
|Information on this page is from Missouri Botanical Gardens,
Dave’s Garden, All things Plants or Texas Superstar
This page last updated or reviewed 210723