Can the iron bucket used for latex paint be used to collect water for watering flowers?

If there is no latex paint left in your bucket, then there is no problem; if there is still paint film inside, it is not recommended to use such a bucket to accumulate water to water the flowers. Because there are many volatile components in some latex paints, once the paint film is damaged, it is difficult to ensure that the volatile substances will not leak out, so if you want to use it, you must handle it well.