I've grown this beauty in Dallas, Tx and Atlanta, Ga. She is a true classic! She is no way near perfect, but her blossoms are close too it.
Lady X gets quite tall. 6-7ft and as the heat and humidity increase, the blackspot can be a problem on the lower third of the bush.
If you, spray regularly....it is pretty easy to keep under control.
Lady X is one of my top 5 ALL Time favorite roses...
Plus, she always produces nearly thornless long stems and full size/perfectly formed flowers.

Grown in Mississippi around 20 years ago, my mom and I purchased a Lady-X rose from a local Greers grocery store. My mom wasn't a fan of washed out, pale lavender color, but I thought it was pretty in a delicate way. As noted by others, the petals were thin and had a tendency to burn on the edges. The plant was not a pretty plant, as ours always grew unevenly. However, Lady-X would produce some of the most beautiful, high-centered blooms. In the spring and fall especially, the bush could be counted on for some classically beautiful roses in a unique color.

I enjoyed the comments in 'Sterling Silver' so much that I thought I might have to re-look at the identification of one of my foundlings. I had come to the conclusion that my rose was 'Lady X' and I have put a few more references on for this rose. There are three different parentages that I have found on a quick search:
1969: Seedling x 'Simone'
1969: (‘Pigatelle’ x Tristesse) x (‘Prelude’ x ‘Simone’)
2003: (‘Pigalle’ x Tristeza’) x ‘Prélude’.

I believe the 1986 reference to “very thorny” might be incorrect as almost all other references call it “almost thornless”.

Now I need to look closely at 'Blue Nile', but that exercise will be a few weeks off now.