For Spoonflower Fabrics:

I advise only hand washing this fabric in cold water with incredibly gentle detergents, then drip-drying. Regular detergent, washing machines and dryers have all faded my previous samples significantly, but phosphate free washes in cold have come out fine.

The attached image shows the original fabric, compared to a hand washed sample and a machine washed sample. The machine washed sample faded considerably and the white “creases” were left by tumble drying. 
 

For Finished RAD Garments:

To keep things fresh, I prefer dry cleaning for finished garments. However, like the raw fabric, they can be washed in water. I advise hand washing in cold water with phosphate free detergent, then hang drying and ironing. This will best preserve the garment. 

DO NOT put these garments into a washing machine or dryer. While they have fully finished seams and will not fall apart, the fabric will fade because of how rough the machines are on the material.