Do they flower at the same time? Probably the wrong place to ask
1 Like
I donāt have first hand experience with both, but double-flowered variants of most species tend to flower slightly later than their single-flowered counterparts as a general rule. Iām guessing that someone here is growing or has grown both at the same time. Itās difficult to find sources for the single-flowered f. lutescens here in the U.S. right now; the more widely available, double-flowered f. lutea is approaching full bloom in my garden as we speak.
1 Like
In all areas of California in which I have observed Banksiaes, they all flower at the same time. In my coastal climate, the doubles, Lutescens and Fortuniana are all in flower now. Our climate trigger ārebloomā in all of them and when one flowers, the others do, too. I also grow General Vallejoās Yellow Banksiae, which is flowering with them. "General Vallejo's Yellow Banksiae" Rose
Basyeās Amphidiploid 86-3, the Banksiae X Laevigata hybrid, flowers right along with them. https://www.helpmefind.com/rose/l.php?l=2.58660
2 Likes
They all flower at the same time here too in South Carolina.
-Jonathan
4 Likes
Something I have kept meaning to add about Banksiaeā¦ Iāve long read it can require up to two years to germinate, however Iāve raised three OP seedlings from Lutescens which germinated in only four months. And, this double is one of the four month OP seedlings from Lutescensā seed. So, is the double really a sport or are they naturally occurring seedlings? My experience indicates double flowers are a natural occurrence possible from Banksiae. Purezza is also flowering with the others.
4 Likes
Beautiful, thanks for the responses everyone!
1 Like
Surely the mutation has had to reach the germinative-layers, if seed from the single form can produce double-flowered forms? Maybe the single-form (as collected originally) was a reverse-sport of the double? Although that seems like an unnecessary extra step, thinking it through. Lol
1 Like
Supposedly, lutea selfed resulted in this. 'Rosa banksiae lutea simplex' Rose Then, this one. 'Rosa banksiae alba simplex' Rose Though I have never found hips containing anything on any double form of any Banksiae I have ever āmolestedā. And, Iāve āmolestedā my share looking for them! Iāve not grown the single white, though Iād love to. Iāve had Lutescens for nearly twenty years and continue playing with it annually.
1 Like
They arenāt growing in identical conditions, but my R. banksiae f. lutea is going full tilt, while āPurezzaā has just cracked open its first flowers here in Maryland. My āSnowflakeā is evidently still too young to flower, but interestingly, it has a few small prickles at the thinnest ends of a cane from last year; I thought that it was thornless, but maybe thatās not entirely the case.
I had meant to check on the plants of R. banksiae var. banksiae (the double white, thornless) and R. banksiae var. normalis (single, white, and thorny) at work today but ran out of time. The latter was collected from the wild, so if any is going to show some differences in bloom time within the species, that one should.
1 Like
Those Tom Thumb genes in Purezza appear to demand higher heat to flower than traditional Banksiae and Fortuniana do. I can get them going simultaneously by growing Purezza against a fence which reflects and radiates enough heat to get it going. I have friends, also in a ābeach climateā like here, who traditionally experienced ārepeatā from the Banksiaes while Purezza flowered just once, when they had enough heat, but when that heat subsided, Purezza stopped. Further inland, where the heat arrives like being turned on via a switch and continues for many months, Purezza flowered like a weed as long as it was hot.
1 Like
That tracks. My f. lutea got āconfusedā for the first time this winter and started flowering a little in January or Februaryāit wasnāt even particularly warm at the timeāand then stopped after being frozen into submission until just recently, when it began its usual sequence. I donāt think that my āPurezzaā has ever flowered after the main flush. Summer heat isnāt a problem here, but itās a very different kind of heat (humid with warm to hot nights), and doesnāt always arrive in full force until after these are finished flowering. Of course, I was expecting it to be a bit smaller, too, but it looks like it could become about as big as any R. banksiae now that itās really taking off. I do wonder if it will ever develop the incredible shredding, reddish bark and massive trunk that is one of R. banksiaeās best and least mentioned features.
1 Like
