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25 AUG
Public
After the success of last year’s (2020) hip from the cross with Officinalis, I have used the pollen of 20 different varieties or species roses on Celestial in an attempt to see if I could find if any other, or indeed what other, crosses might succeed using this rose as a seed parent. The crosses were as follows, the = being the dates on which the cross/crosses were made:

Officinalis (x2) = 14/6/21, 5/7/21

Bourbon Queen (flowers left intact, so slight chance of open pollination) (x2) = 14/6/21, 18/6/21

Complicata (x2) = 16/6/21

Lady Hillingdon = 16/6/21

La Belle Sultane = 16/6/21

Quatre Saison = 16/6/21

R. Canina Laxa (Coriifolia Froebellii) = 16/6/21

Agatha (Gallica) = 16/6/21

Coupe d’Hebe (x2) = 17/6/21

Duke of Edinburgh = 17/6/21

Portland Rose = 17/6/21

R. Moyesii Geranium (x2) = 18/6/21

R. Californica Plena = 18/6/21

Dunwich Rose = 19/6/21

Bourbon Queen (flower had petals removed and emasculated) (x2) = 19/6/21

R. Rugosa (99.9% sure it is R. Rugosa Rubra) (x3) = 20/6/21, 24/6/21

Old Blush = 20/6/21

Celestial (selfed) = 22/6/21

Adelaide d’Orleans = 23/6/21

R. Arvensis (x2) = 26/6/21, 27/6/21

Archiduc Joseph = 27/6/21

As you can see, other than purely modern roses, which I have not used ( as I don’t usually include in my breeding programme, if I can call it that!), I have used roses from a wide selection of families and types, genetics and septets. I wasn’t sure what the outcome would be – was last year a fluke, a one off? Would only some work? Would nothing work?! Well, the results so far have been quite interesting.

Although I have yet to open the hips to see what seed have formed, how many, and how fertile, that will be a follow-up part to this at a later date. However, purely from hip formation and ripening so far (on a rose that is only once recorded in the references as bearing hips, and usually is described as having none – mine has never previously had hips until the last two years), 9 hips have succeeded from these crosses (and there may even be a 10th, O.P. one coming too). They have enlarged and ripened at a very fast rate – barely 2 months from the cross taking place, a lot faster than many of my other crosses that were made at the same time on other plants.

There does appear, at least in part, to be an interesting pattern. All the Gallica crosses I used worked to at least some degree, with Agatha, Complicata, La Belle Sultane and Officinalis all producing at least one hip each. The other crosses to work are from a diverse group of unexpected fathers, namely R.Rugosa Rubra (2 out of 3), R. Moyesii Geranium (1 of 2), Bourbon Queen (1 of the 2 flowers I didn’t destroy, so possibly O.P., although not likely), and Coupe d’Hebe (1 of 2).

One of the things that is interesting is that the crosses that succeeded are almost exclusively from the earlier ones made.

I will include photos of the hips in the photos tab, so please take a look if you are interested – I will label the parentage accordingly.
21 MAR
Public
Some notes on seed to hip ratios and germination rates of selected Old Roses when used as the seed parent, in 2020 pollinations.

Number of fertile seeds taken from total number of hips, per cross.
By seed parent variety, in alphabetical order.

Archiduc Joseph x Coupe d’Hebe
1 hip = 6 seeds

Archiduc Joseph x Quatre Saison
1 hip = 9 seeds

Archiduc Joseph x Safrano
1 hip = 17 seeds

Celestial x R. Gallica Officinalis
1 hip = 5 seeds

Coupe d’Hebe x Coupe d’Hebe
4 hips = 44 seeds

Coupe d’Hebe x Duke of Edinburgh
1 hip = 3 seeds

Coupe d’Hebe x Mme Caroline Testout
1 hip = 31 seeds

Coupe d’Hebe x R. Californica Plena
1 hip = 12 seeds

Duke of Edinburgh x Comte de Chambord
1 hip = 5 seeds

Duke of Edinburgh x Duke of Edinburgh
1 hip = 4 seeds

Duke of Edinburgh x Sir Joseph Paxton
1 hip = 3 seeds

R. Gallica Officinalis x Sir Joseph Paxton
1 hip = 4 seeds

George IV x Duchess of Portland (Portland Rose)
2 hips = 16 seeds

George IV x Sir Jospeh Paxton
1 hip = 16 seeds

Old Blush x Comte de Chambord
1 hip = 9 seeds

Old Blush x Duchess of Portland (Portlad Rose)
2 hips = 1 seed

Old Blush x R. Gallica Officinalis
5 hips = 38 seeds

Old Blush x Quatre Saison
1 hip = 9 seeds

Sir Joseph Paxton x Blue For You
1 hip = 11 seeds

Sir Joseph Paxton x Duchess of Portland (Portland Rose)
1 hip = 8 seeds

Sir Jospeh Paxton x Duchess of Portland (Portland Rose)? - a cross that may actually be self pollinated, as it was not quite as clear cut at the time.
1 hip = 6 seeds

Sir Joseph Paxton x R. Gallica Officinalis
1 hip = 16 seeds

Sir Joseph Paxton x Quatre Saison
2 hips = 14 seeds

Sir Joseph Paxton x “Shuttifield Pink” (an unknown Scots rose that I have named after my plants’ place of origin)
1 hip = 14 seeds

Sir Joseph Paxton x Sir Joseph Paxton
3 hips = 63 seeds

Star of Waltham x R. Gallica Officinalis
1 hip = 9 seeds

Star of Waltham x Safrano
1 hip = 11 seeds

Germination rates of seeds that were stratified for a period of at least 2.5 months in the fridge. N.B.Some seeds germinated while still in the fridge (at which point the tub containing them was removed from the fridge but kept in a cool conservatory), while other tub were removed from the fridge after they had stratified for over 3 months, but then germinated soon after being placed in a warm, sunlit porch. Some tubs are yet to have any seed germinate. Seeds from each tub have only been planted as and when they germinate, not en masse. As you will note, there have been some very good germination rates so far.

Figures accurate as of 21st March 2021.

In order of germination, based on the first seed to germinate in each pot and by the date on which said seed were first planted. Germination rate rounded to nearest .5%

Coupe d’Hebe x Coupe d’Hebe
15 seeds (put in fridge on 29/10/20, first planted on 27/1/21), 7 germinated so far= 46.5%

George IV x Sir Joseph Paxton
8 seeds (put in fridge 29/10/20, first planted 27/1/21), 6 germinated so far= 75%

Sir Joseph Paxton x Quatre Saison
8 seeds (put in fridge 29/10/20, first planted 27/1/21), 3 germinated so far= 37.5%

Sir Joseph Paxton x Duchess of Portland (Portland Rose)
4 seeds (put in fridge 13/11/20, first planted 27/1/21), 2 germinated so far= 50%

Coupe d’Hebe x R. Californica Plena
6 seeds (put in fridge 13/11/20, first planted 27/1/21), 2 germinated so far = 33%

Sir Joseph Paxton x Sir Joseph Paxton
45 seeds (put in fridge 29/10/20, first planted 27/1/21) 23 germinated so far= 51%

Sir Joseph Paxton x R. Gallica Officinalis
8 seeds (put in fridge 13/11/20, first planted 3/2/21), 5 germinated so far = 62.5%

Sir Joseph Paxton x “Shuttifield Pink”
14 seeds (put in fridge 12/11/20, removed from the fridge 8/3/21, first planted 14/3/21), 2 germinated so far = 14%

Celestial x R. Gallica Officinalis
4 seeds (put in fridge12/11/20, removed from the fridge 8/3/21, first planted 17/3/21), 2 germinated so far = 50%

Compared to seeds that have been overwintered in pots of soil outside, these have germinated at a massively higher rate – 52 and counting, compared to 2 confirmed and 3 possible seedlings outdoors.
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