Little Rambler has an average pollen diameter of 27.2µm with a standard divination of 1.8µm which is well within the diploid range. A total of 43 pollen grains were measured for this rose with the individual grains measuring between 24.3µm and 31.4µm. So I think we can be quite confident that this rose is a diploid.

I read that there are roses that bloom in warm climat all year . Do roses need winter rest? Is there a rose that would bloom inside the house in winter time? Which one?
Thanks a lot