Flowers appear in late spring to early summer. Most varieties are cold hardy in zones 6 and above. In colder climates, dig up the bulbs to use as indoor plants. The purple varieties of oxalis are not invasive.

Why is my oxalis not flowering?

If your Oxalis triangularis starts to look a little rough, despite nothing changing in its care, it may simply be entering its dormancy period on its own. It is not dying, so you should not worry! Think of it as a chance to rejuvenate your plant. The dormancy period is normal so you'll just have to get used to it.

How do I make my oxalis bloom?

When to Plant

Oxalis go dormant in the summer rather than the winter and prefer being planted in the spring, as this lines up with their regular blooming period. Many species flower sometime between spring and summer with possible repeat blooms in the fall.