@celcius_kkw Roses like pH 6-6.5 because it is the range where most nutrients are most easily accessible. They are not true acid lovers or lime haters like rhododendrons or similar plants, it's just that the 6-6.5 range is the best for most plants, making it easiest for them to grow. The Laxa rootstock is used because it can tolerate a wider range of conditions, including alkaline soil.
Species roses can like different conditions depending on their origin. Rugosas are originally beach roses, growing on beach coasts and sand dunes, in similarly challenging conditions as our spinossisimas (although spinossisimas are well adapted to growing on limestone). I read from several sources that they prefer more acidic soil (display chlorosis more quickly than most roses) but hard to say if this is really true. I guess it can be different for the hybrids, some being more lime-tolerant and some less. It shouldn't matter much if they are grafted.
Well spotted @Tack. Looking forward to smelling it once it's opened. Glad to see your Boscobel looking so good. I don't think it enjoys my climate.......and those spiders are everywhere at the moment. I can't take 2 steps without walking into one but I do check now when going for a sniff
@edhelka Sempervirens grows abundantly around here in hedgerows, tumbling down hot, sunny cliffs and in the shade of my evergreen oaks so must also be adapted to alkaline soil and demonstrably tolerates a wide range of situations. A pretty, tough and evergreen rose. As you say, PH doesn’t matter so much for a grafted rose, but may be relevant if you grow from cuttings. Perhaps I might have had more success growing a sempervirens hybrid like Felicite Perpetue rather than the rugosas, but my rose knowledge was pretty limited back then. Now I do my research before I buy 😊
Mountainous Northern Catalunya, Spain. Hot summers, cold winters.
@Tack, really good news to hear you’re scotching my theory, must just be me 😆
Another lavender/pale mauve rose with a good fragrance I considered was La Rose du Petit Prince, an HT from Delbard. I had enough HTs on order though so chose Love Song instead. @newbie77 I think it was you looking for a lavender rose?
Mountainous Northern Catalunya, Spain. Hot summers, cold winters.
This query is probably directed to @Marlorena or @celcius_kkw, but if anyone else can advise feel free...and it is that my pots arrived today for using in the Autumn to pot up some of my roses for a 2-3 year period, but because of a slight oversight on my part, I've realised they are only 26cm deep...20ltr pots, but relatively shallow. Will these be deep enough for the purpose they are intended for.
@peteS ..yes,.. as I demonstrated earlier, you can repot fresh each season, or keep it going with some top dressing... good for up to 2 years but not 3 unless repotted.. they are the same size I use.. 36cm x 26cm.. 20 ltr..
@Marlorena...that's good news...2 years should be ample time to see if I like the new ones and for the strugglers to be given more room and get better established.
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Another lavender/pale mauve rose with a good fragrance I considered was La Rose du Petit Prince, an HT from Delbard. I had enough HTs on order though so chose Love Song instead. @newbie77 I think it was you looking for a lavender rose?
..yes,.. as I demonstrated earlier, you can repot fresh each season, or keep it going with some top dressing... good for up to 2 years but not 3 unless repotted.. they are the same size I use.. 36cm x 26cm.. 20 ltr..