Lance-Leaf Marguerite Argyranthemum foeniculaceum

This daisy-like bushy plant is grown as an evergreen herbaceous perennial in its native habitat, which includes North Africa and the Canary Islands, primarily on dry cliffs in rock crevices.  In other locations, it can be grown as an annual. 

It has both male and female organs and is pollinated by insects.  It is suitable for both dry and moist locations, however, it will decline when high humidity is present.  This drought-tolerant plant cannot grow in shade, full sun is ideal.  Ensure to provide a sheltered location with some protection from the afternoon sun in hotter climates.  

The blooms grow above the leaves, forming a carpet of white.  Removal of dead flowers may extend the blooming period.  This plant can be reshaped by pruning after all flowering has completed.

In some locations worldwide, the plant has been declared as an environmental weed, escaping gardens and creating competition to other native plants.  

Insects, Diseases and Other Plant Problems:  Will not grow in shade.  Aphids and leaf-mining sawflies are common insects.

Poor drainage may lead to fungal problems.

The Clemson Cooperative Extension Home & Garden Information Center has a factsheet on common pests and diseases.