22,151 Garden Web Discussions | Roses
A common problem with rugosa roses in the North is Rose Stem Girdler. They kill whole canes by tunneling under the bark in a swollen area. Look for these canes in mid to late summer, cut below the swollen area, and bag or burn it. Otherwise the larvae survive winter and become adults that lay more eggs the following season.
Yes, I think you have to be a member on HMF to us the private messaging. I would encourage you to join because it's well worth it.
Dave really needs to get his roses out there. I looked at all his plants listed at HMF and they were all beautiful! Lots of them are stripes and have great form!
Oh my goodness!!! How can that rose NOT be out in commerce!!! It's exquisite!!!
I also decided (just now) to go look at his other roses (never thought about it until I read above). They're GORGEOUS!!!!!!! I can't believe he's not selling his roses. If those roses can't get into commerce, then nothing can.
Carol
I found these photographs of the Huntington on Hoov's blog: Huntington April 13, 2015. You have to scroll down until you get to the April 13, 2015 post. Thanks to Lynn and Hoov, I'm starting to appreciate those distance shots. They are quite something.
Do you think it could be First Class (Class Act)?
If it's been in the same pot for 10 years then I think it probably needs to be root pruned and new soil. Even in zone 5 with a short season that's a long time in the same pot. I'm sure it's root bound and the soil is probably completely depleted. Even with fertilizing you need to refresh the soil now and again.
I can't find the memory stick the scans are on (I moved), and the ARS annuals are boxed in the garage, but in the seventies or eighties, there were at least two articles in the American Rose Annuals about the use of ground pine bark cleaning root knot nematodes from the soil. It was used both as an amendment, mixed in the soil as well as a mulch. Previously infected soils and plants were found to be "cleaned" of the infestation simply due to the cleansing action of the pine bark. You might consider using it if it's locally available in your area. You might also search this forum for the scans as I am sure I have posted them within the past two years when the nematode question was raised previously. Good luck.
Oh yeah, i forgot about the french marigolds. They are ridiculously easy to grow from seed (and fast to bloom) so if you can't find them at your local nursery seeds will be the way to go. Also the pine thing Roseseek mentions. Thats why I said to mulch heavily with pine based mulch in the first reply. I should have clarified that pine mulch repels them.
you might give it a try. I also drain the water out of the self-watering pots because my roses weren't big enough when I re-potted them to have their roots reach that far and I didn't want to rot the roots with soil that is too moist. If you plant something in a pot that is too big where there is a lot of soil around the roots, it is possible to keep the soil too moist for the amount of roots and then you will end up with root rot. Not good. Suggest you test your soil before watering - stick a finger in the soil - if soil sticks to your finger, it's moist enough. If it's dry, you'll be able to tell.
Do you seal your pruning cuts. If not look for a round hole any where the rose was pruned. If you find a hole, something put there larvae in there. Even leaf cutter bees will lay larvae in cut stems.They eat their way down where they over winter. When you see a hole in spring before you prune for the season. Cut till you see no hole. Then cut the cane in half just above that and you can see the tiny black developing bee larvae. Of course there are many types of bore insects that can affect roses.
Should that cane start to wilt the sooner you cut the better as if something is in their it will continue to munch it's way down. If only the flower or bud is wilting than something laid eggs in it. Take them off and discard in garbage. You would not want the eggs to develop.
Usually he type of borer that causes wilting tips is not the type that drills nursery chambers in cut cane ends. The latter is the Small Carpenter Bee. I tolerate these without any major problems. One borer that drills way down the cane after starting near the tip is the Raspberry Stem Sawfly, but I don't notice them before July.
See the excellent Baldo Villegas page for his discussion of borers.