Oxalis Versicolor

Question

How deep to plant the seeds and the spacing?

Answer 1

Seeds can be direct sown in the garden in late summer or autumn.
A shallow planting depth and cover with soil. Space 3 to 16 inches apart.

Rhizomes are a good way to plant Oxalis.

https://www.gardeningknowhow.com/houseplants/shamrock/growing-shamrock-plants.htm