I bought a bunch of pretty white spray roses at the market. A few days later, they developed brown spots on most stems. The spots are very soft, almost feel like rotten. These are due to water dripping on the petals at some point, I’m assuming that it happened when the whole seller put them in water at the market. This is why when one handles roses, they should always make sure to never drip water on the petals.
Once the damage has been done, the only way to fix the issue is to carefully remove the affected petals. It took me a long time to go through every rose in the bunch but here is how they look like after the treatment.