Rose Hybridizers Association Forum

That's troubling :/ often a small percentage are resistant to these sort of things.

So what does this mean? That no commercial cultivar is safe?

I'm possibly too new to offer much with roses specifically (a decade or so with various other plants) but really it comes down to whatever the breeder is willing to accept and then skewing the population as a result. Sure when dealing with species or a few generations from you will need to be a litt...

In many other plants it's about protecting sexual parts, the insects that pollinate them aren't out at night, frost damage (due to temp drop at night), rain, etc.

It's probably connected to that in some way.

SSC is very disease prone and so far I have struggled to get around this. It had very bad mildew shortly after I got it (potted) but this disappeared once put in the ground where the supply of water was more reliable. This gave way to black spot and both my plants completely defoliated. Just an upd...

Harvest seeds end of Feb/beginning of March, sown within a week in small flats (or in reality, ferrero rocher chocolate clear plastic containers, easy to maintain moisture, they sit behind glass so mileage may vary if in direct UV) with maybe an inch of potting medium, they germinate and develop a f...

I don't, all germination happens during autumn and winter for me, it's the first day of winter here and many of the seeds I planted the early autumn (march) have tiny little flower buds. Hurray Australia! I never had much success with stratifying of any species (alstromeria, tulips, iris reticulata,...

The thing I get a lot from E4Y is drastic fading of the blotch in the sun. Jim has done a lot of work on this front and is making excellent progress on developing sin-fast blotches but it sure won't come from E4Y. Just on this, given your current preference to 4YEO, HMF seems to show it fades terri...

So I've been devouring the forum for information. I'm highly interested in the sweet briar and have learnt that: 1. has a configuration of R rubiginosa 4+1 2. foliage scent is passed maternally (given the 4+1 that's fair enough) now given the 4+1 kind of points out that pollen essentially behaves as...

I am a little bit, just seedlings a few weeks old with banksiae and a couple with rugosa at this point. Sweet Spot Calypso is very available here (Sydney, Australia) as the big hardware chain (bunnings) stock it. Only concern with Sweet Spot Calypso is mildew, it was really really covered in it when...

The second seedling O18 P20 is a (Baronne ed Rothschild X Mme C Testou) X Sympathie X (Mimas X R. virginiana). It is also displaying bluish foliage colouring with good vigour. I really like the foliage colour of that one but see no other mention of it in the forum search. Any other pics or details ...