keithp2012 said:No seedlings came up for me after two years waiting. 😕
Likely just a case of the cultivars not being compatible or possibly one or the other not being fertile, without knowing what the roses are it's hard to say. Just remember that the genetic history of roses is made up of a lot of different species with different breeding requirements and while hybrids have been made with all/most it doesn't mean that it was easy to do or that things readily crossed...these difficulties can and have been passed down and can surface when the two roses being crossed don't share much genetic history as the genes relating to fertility are likely different and don't mesh well.
Having said that, I'm possibly one of the lazier people with rose breeding. I do nothing special other than collect hips the last week or summer, extract the seeds during the following week (any longer and hips start rotting for me, it's usually very warm in the 90°F and up range here at that time of year, it's not pleasant to handle...) and then sow all the seed out. Autumn rains will start (it's lucky if a week without a fair bit of rain goes by...I suspect this plays a big part in any inhibitor chemicals being removed quickly). Then 3 to 5 weeks after sowing, right around when the min temp drops to around 60°F, I'll have around a 1/4 to 1/3 germination of what was sown. No cold stratification, no scratching of the outer seed layer. Point is while a lot of roses seem to take a magical effort to breed, many modern cultivars (most of my roses stem from Tom Carruth, Ralph S. Moore or Reimer Kordes...so things basically everyone in the world has access to) are far simpler than what is often stated.
