I acquired a few bulbs of Oxalis 'Iron cross' from a garden center a few weeks ago and sort of laughed at myself for buying what is a weed for a lot of gardeners. But I wanted to add something new to my tender bulb collection and they seemed the right size for a small pot I had laying around.
One week after planting them the first flowers started to emerge while they sat in a sunny windowsill. From my readings on this bulb I've discovered that they can tolerate moisture but like it a dry and sunny summer. On one gardening website I came across a gardener said the bulbs were winter hardy in zone 5 but instead of planting them in the ground and risk loosing them I'll keep them potted up.
The leaves have yet to emerge but the burgundy center is what attracts gardeners to this plant. It grows to about 6-12 inches tall and 12-15 inches wide. Oxalis is propagated by division but I've been experimenting with pollinating the flowers and will see how successful I am at producing seeds.