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Time between flushes, etc.?

Posted by Sara-Ann z6b OK (My Page) on
Sun, Aug 31, 14 at 6:27

So you will know from the start, I am asking about hybrid teas, floribundas and grandifloras. In some years will it take less time between flushes, will some roses repeat more quickly? Isn't the average time between cycles between 5 and 6 weeks? The reason I am wondering about this, is I took a lot of pictures of my roses last year, they are all downloaded into my computer, each day that I downloaded has a folder. I started doing this in late June, because that is when I got my cheap little Canon. I could tell from the pictures and the dates that some roses bloomed about every four weeks. Is this something that can fluctuate, depending on weather? This year, so far I have had three distinct flushes, one in early May, one in late June/early July and one that just finished that began around mid-August. I was hoping for a couple more, but I don't know about that, I'll be happy with what I get. I've grown roses long enough (with some off years) that I should know, but this year seems slow to me.

There is also something else I've wondered about. I notice occasionally someone will state that a particular variety is never without blooms. I've even read that in some rose descriptions. Do they mean that literally or do they mean it repeats very quickly?

This post was edited by Sara-Ann on Sun, Aug 31, 14 at 18:31


Follow-Up Postings:

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RE: Time between flushes, etc.?

Modern bush roses repeat in 40-50 days, depending on the variety. The number of petals is one of the factors. The main environmental variable would be, if roses run out of water at the end of the previous flush, that will slow the repeat. Repeat also slows down in late fall because the temperature retards biochemical processes.

"Continuous bloom" means that, after the first flush, the plant produces scattered flowers rather than well-defined flushes. It does/t necessarily produce more blooms. No rose can be in heavy bloom all the time--only annuals or plastic plants can do that.


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RE: Time between flushes, etc.?

  • Posted by vasue 7A Charlottesville (My Page) on
    Sun, Aug 31, 14 at 12:18

Been rather a slow cycle year for bloom here this year, too. Suspect a result of the on-again off-again Spring (after unusual extended Winter cold) that delayed soil warming till nearly mid-June - a full six weeks later than the norm. Wonder if that crimped helpful soil organisms' growth, which in turn affected the roses & other plantlife?

Two roses that previously pumped out flowers continuously - by which I mean new buds beginning & others swelling at the same time blooms are opening, each stage simultaneously ocurring in great quantity - haven't managed to do so this year but instead produced three traditional flushes with lower number of blooms. Floribunda Easy Does It and shrub/climber Golden Celebration are the two that displayed actual continuous bloom in prior years. Roses that rapidly cycled previously - 3 to 4 weeks from petal fall to new blooms opening - have taken a week or two longer. Even weeds that typically grow quickly & luxuriantly here have been relatively restrained this year.


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RE: Time between flushes, etc.?

Thank you Michael and Vasue.


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RE: Time between flushes, etc.?

I am not sure if I am second or third, continuous, occasional, sporadic, or any other flush! A few of them need to be flushed.


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RE: Time between flushes, etc.?

This made me think because I have a few that seem to always have blooms, mainly my Nacodoches and pink Don Juan. I have noticed that my Nacodoches blooms in flushes but there are so many buds that it just seems like it is never without a bloom and it also seems to have a fast rebloom. That's the only one I can comment on right now because all my other roses are babies and seem to be resting due to the heat and not blooming right now.


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RE: Time between flushes, etc.?

  • Posted by seil z6b MI (My Page) on
    Sun, Aug 31, 14 at 19:17

Michael is right about the time it usually takes for them to recycle but weather conditions will also affect that time as well. I've found that when it's cooler, like it has been this summer here, they take a little longer. In warmer years they repeated quicker for me. But if it's too hot that may slow them down as well. Also the amount of sunlight they get will make a difference. In cloudy, gray and rainy years they take longer to repeat. When it's more clear and sunny they repeat faster.

What you might think about doing is keeping a log of bloom times for each of your roses for a couple of years. Then you can see approximately how each one behaves. I did this early on for exhibiting purposes and it was very interesting. In the long run I don't think it made a lot of differences in my showing but it was fun!


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RE: Time between flushes, etc.?

I have noticed that my Scentimental is my fastest repeat. Pope John Paul II repeats fast. Probably even the location in your own yard affects the repeat cycle.


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RE: Time between flushes, etc.?

Countess Sonja and sceptered isle are never without blooms. Wish CS
had a fragrance.


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RE: Time between flushes, etc.?

Susan, I hope you don't mind that I turned your photograph of Countess Sonja right side up. Your rose is beautiful, whichever way you look.


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RE: Time between flushes, etc.?

A big factor in the repeat would be your style of removing spent blooms. I often do not cut my canes, but rather snap off the spent blooms. I think that this would encourage more of a continuous bloom rather than to wait until the rose has finished blooming then cut it back.

I often snap off the spent blooms when I have needed to cut back drastically in the spring. In this case there is no need to cut the stem, just the spent bloom -- and that would give a more continuous bloom effect.

Sammy


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RE: Time between flushes, etc.?

Thank you everyone for your suggestions. Boncrow - Seems like I saw a picture of your Pink Don Juan - It is a beautiful rose. Seil - I like your idea of keeping a bloom log. Susan - Your Countess Sonja is a beautiful rose. How long have you had it? I don't think it's available now. Kentucky_rose - Glad to know your PJPII is a good bloomer. I planted one this year and I love the blooms, they're gorgeous. Sammy - Thanks for your suggestion.


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RE: Time between flushes, etc.?

Oh no.... No more countess Sonja? She explodes in the spring and never stops!


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RE: Time between flushes, etc.?

  • Posted by vasue 7A Charlottesville (My Page) on
    Mon, Sep 1, 14 at 15:51

Sammy, believe you're right about snapping the blooms encouraging greater continuity. That's my style, but most enjoy roses in the garden rather than taking them for vases. Considering a cutting garden with roses so they could come inside with me without feeling I'm robbing the garden, lol. Buy roses for Winter vases, just seldom cut my own...

Susan, your Countess is breathtaking! HMF lists her as "mild fragrance". Is that code for "none"?

This post was edited by vasue on Mon, Sep 1, 14 at 15:53


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RE: Time between flushes, etc.?

Here's a good list of factors involved, some already mentioned by other posters ;- )

Cold nights and cooler weather in generel slows growth. Around 61 to 68 degrees Farenheit you get closer to optimal growth and flower bud production. If night temperatures drops under 50, growth slows down a lot. Too hot slows things down too, above 86 on some varieties; depends a lot upon how much water roots have access too and how well established roots are.

Drought will slow things down

Fertilizer and well kept soils give much better growth than neglected. Compost and amendments help a lot.

As plants grow older regrowth slows down too, both on ownroot and budded roses. You should at least get 7 years of any rose yoiu plant as long as winter or other horrors haven't damaged them. Old roses can put on a good display of flowers so there's no reason to repace them unless you produce cut-flowers for sale.

A hard winter and spring can slow a rose down considerably, and noticeably well into summer, but it will regain both strength and speed with better weather.

...and of course a major attack of mites, aphids, larvae, beatles, sheep, horses, lawn mower or neighbourhood children doesn't help either.

A hard pruning will slow a plant down much more than a light pruning. If it get's to keep some leaves and stems regrowth comes quicker. After winter it doesn't matter that much, since the plant already is dormant, winter dieback and all that, but even then a light pruning can give a plant 3-4 weeks head start on hard pruned ones.


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RE: Time between flushes, etc.?

  • Posted by seil z6b MI (My Page) on
    Mon, Sep 1, 14 at 19:04

I have to agree with that last one, Tao. When I quit just automatically pruning my roses down to a foot in the spring and started only taking off the winter kill instead I got my first flush a good 2 weeks earlier. I just kept thinking, why am I cutting off good green cane just to cut it off? So I stopped. The roses do get larger over all over the course of the season because of it but I don't think that's a bad thing either.


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RE: Time between flushes, etc.?

Actually, that comment Seil made makes sense but kind of confuses me also.

Are you saying to just cut Dead, Damaged and Diseased in spring, and then doing harder after bloom pruning?

I was reading that for several more stingy bloom roses, like Mr. Lincoln, that harder pruning was required so the plant would put up more basal canes and thus more flowers.


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RE: Time between flushes, etc.?

Hey Just_One_Nerve_Left,

We have had Mr Lincoln since 2010 and I'm still trying to figure him out...lol (Own root)

All I can say is experiment and see what works best for you and your roses then go with it...


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RE: Time between flushes, etc.?

  • Posted by seil z6b MI (My Page) on
    Thu, Sep 4, 14 at 19:10

I really never hard prune anything any more unless it's damaged and has to come out. When I dead head during the season I just snap the blooms off right below the hip. My roses get TALL by the end of the season but i like them that way. I think the roses are happier when just left to grow as they please instead of me trying to tell them how I want them to grow. And all that cane is stored energy for the plant. In bad winters I do lose it but in good ones they came back much quicker because of all that extra food stored. I tend to think we fuss and prune WAY more than we have to, lol!


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