pest: Blood red leaf powder?

[oreandra]

My Heimia plant has blood red powder on the underside of the leaves. Some of the leaves are blushed color w/o powder. It has been dropping new growth and after vigorously growing for a month has started looking rough. The only changes I have made are a little fertilizer. They get watered 1-2 times a week. I mist now and then as well.

Please let me know if you know what this is or what to do about it. I will hand wash the leaves with tea tree soap.