Germinated in spring 2023 - winters 2024 to 2026
Merveille x Fedtschenkoniana
Never ever protected for winter. Rigid growth structure for long canes giving “fountain form”.
Not as stellar as last winter - this winter 2 to ~ 3 foot canes had more than a bit of tip damage. These cane length sections had 6” to 1 ft plus of cold temp. damage. These thin (small diameter ) sections lost. However at called end of damage at least one budding point survives at leaf cane node.
18” to 12 “ from crown ground all good.
Merveille x John Cabot
First time reporting on winter performance. No protection intervention.
Flexible canes as a growth form - opposite of John Cabot whose canes are stiff - closer to Merveille in structure.
Heavy snow pushes canes down quickly and remain down. Likely cause of good performance.
None to 10-20% cane length damage.
Red- green buds through out some of the canes’ lengths.
Tip damage, including nearly whole cane lengths but latter due to big foot wrong landing spot in fall.
Performance nice surprise because John Cabot canes usually don’t have good survival of more than 50% in my garden but rebound quickly to bloom - why selected. Must be the cornucopia gene ( forget technical name - no l didn’t due to effort and forum library check believe recurrent is blamed on KSN-copia) .
According to Google AI … nobody knows.
“In rose genetics, the KSN-copia insertion is the primary molecular marker for “true” remontancy (continuous reblooming). The John Cabot rose, however, is not a continuous rebloomer; it typically produces a massive flush in June and July, followed only by sporadic or occasional repeat blooms later in the season”
Those blooming traits l agree with, except mine bloom later, early August and l assume due to cane damage. At last count l have 6 to 8 bushes scattered throughout the south gardens for 15-20 years.
Merveille x Porsliini Kaunota
Excellent performance by my standards for a thin wiry seedling that had lower leaf suceptibilty to PM. Upper leaves clean. Tallest main cane 2” to 3” tip damage on 16 “ long cane.
Rest of lower canes green budding occurring.
Additional
No pictures of any as most would say !! what looks dead to me !! Nah just kidding. Its too hard to take as small area fenced in from outside vermin.
Environment of plot - south side protected from North and East winds. As mention no interventionist protection.
Don’t remember any -30C nights this winter past 7 days ago. Except in early winter dropped to -25C. However this is the winter that won’t leave this April.
There are a few “Mystery to me Crosses” due to lost tags. Guessing either more JC and/or Fedtschenkoniana crossed examples.
Though one is very thorny and has bolt up right cane carrying powdery mildew remains on it. Must have more species in it or vagrant germinated OP l chucked in. Nearly full hardy (90%+) and budded out for spring. Some ling needle like prickles - be watching this year.
It also appears in another test area two of my “small wirey” mosses crosses made it - but too small to pass judgement on survival chances though l got buds.
They were Caroyale x Madame de la Roche Lambert and Laxa x Madame de la Roche Lambert. Planted outside after germinating last spring. Pollen donor moss in bed and appears ro be healthy.
Skinner’s “Mossman” also in bed.
All in all 2022 and 2024 were excellent crossing seasons. Excited also because in theory getting another seed parent to replace the star one.