Hi,

Shamrocks or oxalis do not like to be fertilized. That is probably why the leaves are spotting. As far as putting oxalis in direct sunlight, I don't know. They certainly don't need that much light. I have mine in a northern window and it does wonderfully.

Larry

Mine like quite a bit of light indoors...if they don't get enough, they will become leggy.....but they also like to have a dormancy period...wonder if they are needing that?

You can transplant them, this will force them into dormancy and then (in their own time) they will resurface fresh new leaves.

Mine like to reside on the north side of the house during the summer.

Mine likes light, but it has its ups and downs. I water, but not over water it, and it will go dormant then all of a sudden its like a surprise package, there it comes up again. I think they are more of a bulb type plant. I think??? I have the purple one, and the flowers are so cute. Fun plant!