Washer Drains..... Soap comes out of floor Drain??
This is a sure sign the drain is clogged somewhere. You can try to have it Roto Rootered but if that doesn't work you might want to hire a plumber with a drain video camera.
If tree or shrub roots have gotten into the drain pipes, you might succeed in get them cleared out but you will have to redo the chemical treatment at least twice a year to keep new root growth from taking over again.
The disadvantages of crab apple trees. In summer, the apples are too sour to pick and eat. In winter the birds come and leave dropping all over the place.