In reading other comments, perhaps I am too cautious with my linen. I do wash it on regular (I have a front load washer, so it's like delicate cycle for a top loader as far as wear on clothes) with woolite or other delicate wash. When I started having linen garb, I read up on the internet and was told by the ever-reliable oracle that linen fibers are not as strong as cotton's when wet, so a super-agitating top loader might cause undue wear. Also to use a soap like woolite rather than a detergent as it's better for the fiber; I cannot cite my source. I use warm for whites and cold for colors because of potential for bleeds, but it is not usually a problem *except with RED*. I wash reds separately if possible, as some bleed like mad.

Internet also said that heat drying will over time weaken linen, but I believe we're talking hundreds of dryings, not dozens. I line dry my stuff if feasable, because I have few dresses I wear often. It sounds like you are the opposite, so go for it with the dryer on medium or low.