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Elizabeth Park                         Hartford, Connecticut

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The Rose Doctor's Hospital Acute Care Center.

This is intended to be an interactive, responsive area to answer both common rose growing questions, with the Connecticut and Northeast climate in mind, as well as answering submitted questions.  Of course rose growing questions that are specific to you as an individual (instead of a generic question) are probably best handled by contacting a Consulting Rosarian (CR). For those, click on the
Call a CR!  seen at the top of each page on this website.  If you have a question that you believe would benefit others, send it to: webmaster@ctrose.org (and it will be forwarded to Dr. Rose).
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Dr. Rose,
Dr. Rose! I'm getting bizarrely small blooms on my roses (these are 3-4 year old bushes). Where the blooms should be 4"-5" across, they're about an inch to an inch and a half. Or instead of getting a nice tea rose form, I'm getting single or double petals. I'm spraying for bugs, fertilizing, deadheading, and I adjusted the soil according to the soil test I had done... The foliage looks fine. What the heck is going on? I've noticed these weensie flowers on Memorial Day, Opening Night, Chihuly and Sentimental, while others seem to be unaffected. Also, I'm not getting many blooms during the summer, after a spectacular first bloom in early June. Is this normal? Is there anything else I can do to encourage summer blooming?
Thank you -
Linda
 

It sounds like you have a classic case of over-fertilization, specifically, way too much Nitrogen.  This will tend to cause all the symptoms you mentioned, and can cause small blooms (often distorted), but large green leaves.  In addition, the next extreme is that stems become bean-stalks, but with small and deformed new leaflets at the tops of the stems.  And at that stage you may see "vegetative centers" in blooms.  These are blooms that have a green growth in the center of the bloom- usually seen on blooms with many petals in the open bloom stage (like Austin English roses).  Your only two recourses are to wait, and dilute.  Time will solve the problem- but if you used granular fertilizer it may take several weeks.  Removing granular that is still on the soil surface is time-consuming, but helpful. If the problem was caused by liquid fertilizer, that is more transient and may be assisted by Lots of plain watering.

I'd take a soil sample and take/send to the Agricultural Experiment Station (New Haven or Windsor), to confirm.  You should not have to fertilize again this summer.

 

Dr. Rose! Dr. Rose!:
Q: I have read that newly-planted bare root roses should be covered with soil for the first couple of weeks.   WHY?

A:  This is usually very important.  And most CR's will preach it strongly, especially when the weather is Hot after the new rose is planted.  And in some cases (Northeast in late March 2007, when the weather is abnormally DRY [9% humidity in Hartford, I understand}.  The underlying reason is that new bare root roses have no established feeder-root system.  Those big roots you see are like arteries and veins, but they are useless without capillaries (those tiny, fragile feeder-roots).  The plant cannot properly take up either nutrients or adequate water until they grow in and become nestled in the soil properly (that is why you water newly planted roses so thoroughly- to get the soil next to the roots, instead of air).  Since there is little water going up the stems from the roots,  and since there is still some escape of water from the stem to the atmosphere (aggravated by hot, dry conditions), you want to keep damp soil (or a paper bag) around the stems for a while.  When the stems produce leaflets, this is a sign that some feeder roots are established... you can remove the covering (but still best to keep direct sun and hot/dry conditions at bay for a bit longer.  This is an important planting step.  Those who have planted roses very successfully when ignoring this step have been lucky, not skillful.

Dr. Rose! Dr. Rose!:
Q: I have read about the Bayer Advanced Garden Product called All-in One, 3-in-1, 2-in-1, and others.  I'm confused.  Are these products as complete as they say?  Which does what?

Ans:  Yes, the Bayer line of products has quite confusing labels.  This is even worse when you go to the Garden Store to purchase and some of the products are not on the shelves for direct comparison.  The store literature is not always available, as well.  Many rose societies have reported very good results with these products.  In general they are more 'modern' (aka Advanced) than some of the legacy products by Ortho/Scotts.  You should go to the Bayer website for a detailed comparison.  Specifically: http://www.bayeradvanced.com/productFamily/rose-and-flower-care.html.

Some overview and personal pointers/thoughts on these products:
    The liquid concentrate, Disease Control for Roses, Flowers & Shrubs, mixes with water and is a systemic spray for the leaves.  It has received high marks from rosarians who have used it.
    2-in-1 Systemic Rose and Flower Care is a granular product that is sprinkled on the ground around the bush. It fertilizes and systemically treats for insects, and mites.  It does NOT treat for diseases. Some rosarians say that at the recommended dose the fertilization rate is too low to be used alone, especially in the south where the plants stay large longer.  In addition, it treats for insects in advance of infestation (although systemically, not being sprayed).  Most recommend dealing with bugs only when needed.  You still need another product (see above) for disease.   
    3-in-1 Insect, Disease and Mites-  note this is not a continuation beyond 2-in-1, it is DIFFERENT.  It is a spray (concentrate to mix with water of ready to use in spray bottles for small gardens).  It does Not fertilize, as does 2-in-1.  This may be what you need to treat for aphids, then caterpillars, then Japanese beetles all the while treating for disease.  You apply fertilizer separately, but this is often preferred by rosarians (where a small mixed flower bed may be looking for an easier solution, without any spraying (2-in-1 and live with disease on perennials).
    ALL-in-ONE  is fertilizer (but maybe not enough, alone), disease and insect killer.  All systemic.  It is a liquid concentrate that is mixed with water and applied to the base of the plant (no spraying).  Works some, and is very easy, but the tradeoff is that it is not AS effective as the specialized products, in some rosarian's opinions).  HOWEVER, not everyone wants to live in the garden with complex schedules of treatments and sprays. And!  many of the modern rose shrubs, floribundas (and to an extent other newer roses) are more disease resistant than in the past (due to smart hybridizers) and a more moderate plant treatment regime can be successful!  Many new rosarians in the South are leaning to less demanding roses and less work to all for more fun!!!  Probably this is true in New England as well. 

This will help clarify your quest for the Perfect Rose treatment, as available from Bayer.  My discussion is brief, be sure to go to the Bayer website for more details.

Everything said above is based on a 'relatively' small garden- say less than 25 plants.  If you have a large garden, the Bayer products can be very expensive.  If you have more than 50 roses or so, then very concentrated products such as Compass and Banner Maxx (disease) and Merit (TM) (insect control) make much more financial sense.  My buddy, Robbie Tucker, does the math nicely about once per year in his Infomercial advertisement in The American Rose magazine.  The products I just listed come in rather large containers, and so they can make a double-lifetime supply for a small garden- thus are economical for big gardens.

 

Dr. Rose!  Dr. Rose!:
  We are members of the CT Rose Society although as yet we have not been able to attend any meetings.

We are new to CT and moved a number of roses (about 15) in larger planters up from Florida in the spring of this year. They recovered from the trip and did well over the summer. We plan to leave these roses in their planters and would like to over-winter them in our garage. It's a large unheated garage which faces north and it has an insulated garage door. Somewhere I read that others had done this for roses in planters and it worked out okay if the planters are watered once a month. We plan to put them into the garage about mid-November and take them out about mid-April when we would resume our regular feeding and anti-fugal treatments. 

Ans:  Good Job!!  those that stayed in the south don't have quite the problem that y'all who moved North do- nasty winters.  Your plan is sound, assuming that the pots you are using are really large.  The goal is not to prevent freezing, it is to significantly reduce the freeze/thaw cycles (in frequency, but particularly magnitude)  and to prevent dehydration caused by wind.  The unheated garage does both. From a medical point of view, the temperature swings and dehydration are similar to the nasty effects of frostbite on humans.  With people, however, the situation is much more complicated with blood circulation.  For roses, the internal cells build up the equivalent of antifreeze slooowly as winter sets in, so as to prepare the plant for the winter struggle.  Wildly cycling temperatures give mixed signals to the plant.  Result: not good.
Do provide some water periodically, but this is just to reduce dehydration, not promote growth.  No need to water a block of ice-bound roots.  And no overly warm water, please.  And don't be in a hurry to bring the pots out in March for the first warm days in 'spring'. 

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Dr. Rose! Dr. Rose!:
When do I spray for Japanese beetles, and with what?

Ans: Spray the roses for insect pests when the pests are seen in the garden.  For Japanese Beetles this is the very beginning of July in Connecticut. This is “treating the symptom” medicine, rather than preventive (inoculation) since treating the symptom is the way the insecticides generally work. JB’s need a much more robust medication than do soft-bodied aphids, for example.  A product that contains Merit is likely the best wager.  Another product is called “Eight” (commercialized as ‘better than Sevin’).  The Ortho products seem to be much less effective.  Picking them off by hand IS effective, if you have the time.
For those that have a clear distaste for these critters, and are of the ilk to plan well ahead, look into robust grub worm control [granules- containing Merit (best)] that will kill the beetles in the grub stage for next year (and help the grass from grub eating as well).  Get some sacks of the granules, read the instructions on the label carefully, and apply during the summer months.
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Dr. Rose! Dr. Rose!:
How much fertilizer should I use on my roses???

A- The quick answer is about a cup of 10-10-10 for each bush monthly in the beginnings of May, June, July and August.   But…

This  kind of like “every human should take a multivitamin every day”.   And does not take into account what size human.  Infants take the same as adults?   Of course not.  So the generic advice is for big, adult bushes (HT and big Fl).  Mini’s would get about half of this ‘on average’.

A BETTER answer is: depends on what the soil needs to have a balanced meal for the plants.  You can tell this Only if you have done a soil analysis.  Although Nitrogen tends to deplete and need replacing, that is not true of all soil constituents. Salts and potassium (the K in the N-K-P of fertilizer) can particularly build up over time, so you may need 10-4-10 to counteract a potentially toxic condition.  And pH, don’t get me started on pH.  Soil testing will tell if you have an issue.  And if you have been gardening for a while in CT and have not added lime, you probably DO have an issue. 

So add what your soil needs based on good data from the soil test.  And feed in proportion to the size of the plant.
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 Dr. Rose! Dr. Rose!:
 Should I add Epsom Salts to the fertilizer to encourage basal shoot development?

A-    Depends, of course.  This is providing magnesium, that seems to encourage good basal shoot development.  That magnesium is necessary in the soil is true. However, in CT, our soil is almost always naturally endowed with sufficient Mg. A bit more will not hurt. A lot more, especially if spread at the same time as granular fertilizer, could damage tender feeder roots if not watered in VERY well. 
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Dr. Rose! Dr. Rose!:
  I have heard of a new product that is some kind of natural stimulant for plants to resist disease.  What is it and where can it be provided? 

A-    Sounds like you are talking about Messenger, try this site for more information: http://www.edenbio.com/usa/   (note- hyperlink is valid, you may need to copy and paste it on your browser.

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Dr. Rose, Dr. Rose!:

Where do you prune a cluster rose? I feel guilty when I prune my floribundas about a foot down the bush to get to the first set of 5 leaves. I have to cut off a lot of healthy looking leaves to get that far down. Is it OK to just deadhead?
Griswold, CT

    A- There are several reasons to prune down to a 5-leaf cluster of leaves.  Biggest is to provide the 'average' rose the opportunity to grow a sufficiently strong stem to support the next flush of blooms.  If you just deadhead you may well end up with thin stems and 'nodding' blooms the next go round. 
    That said, for a New Rose you may want to be less aggressive than the 5-leaflet guidance to allow more leaves to produce stronger plant and roots before the onset of the first winter.  Emphasis on building a stronger plant, less emphasis on thick stems low on the plant.
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Dr. Rose! Dr. Rose!:
 What are the best roses for disease resistance?

A-    Generally speaking, shrub roses excel in disease resistance; HT’s are much less resistant. Floribundas and miniatures in the middle. Take a look at the several articles and lists in your website [Rose Culture] for lists of particularly favored roses in the northeast.
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Dr Rose,
My rose books says to plant about 3 to 4 foot on center. However, given the New England winter die back, I wonder if I can plant them closer. The Norwich and Elizabeth Park roses seem to be about 1 1/2 foot on center. I want to plant a broader, can you have too many in a bed?
                                                BW

    A-  Sounds like your book may be for much warmer climes.  3 ft. centers are nice, but usually 2 ft. will do in the NE for HTs.  Known BIG HTs will do better with 3 ft.  Floribundas and shrubs (when not intended to be a hedge) will do better at 3 ft or so.  Too many in a bed, of for a hedge is not usually a problem, BUT: you will have to pay More attention to them since there is less air circulation which aggravates disease (consider the high incidence of staph infections and pneumonia for those during a hospital stay), and there is greater competition for Water!  and nutrients.  A park like EP looks much better with concentrated plants and blooms.  They have to work somewhat harder at maintenance.
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Dr. Rose:  Can gypsum be used in lieu of lime?
 
A:
Gypsum cannot be used instead of lime. Gypsum, also known as landplaster, is calcium sulfate. It is an economical source of calcium and sulfate but cannot be used as a liming material because it does not have the capability to neutralize soil acidity. In fact, applying gypsum to an acid soil (pH less than 5.5) can have adverse effects on certain plants by displacing soil aluminum, which is toxic to plant roots. Gypsum is frequently applied to provide supplemental calcium. But, there is no substitute for lime in neutralizing soil acidity.
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Dr Rose, Dr Rose,
What are your thoughts on fall planting of Roses? Should I withhold all fertilizers in the planting hole if I do plant?
 Jewett City 

A:  Fall planting:
Good for cost effectiveness- lots of sales at local nurseries.  (Make sure you get good value, not just low price- a plant infested with Black Spot will lose ALL the leaves affected and will probably be stunted badly, or die, in the spring.
Of course, the only fall planting in New England is a potted plant to the ground.  NO bare root should even be available from a reputable dealer.  If you buy a good potted rose, consider nurturing it in the pot until it is nearly dormant (aka Thanksgiving in CT), then putting it in the hole.  Dig the hole now if you want.  You CAN plant the rose now, but it will take a 'setback' and late in the season (September), this may untimely.  In any case you will nix any last bloom for the fall.
But to focus:   NO Fertilizer (that contain Nitrogen) when planting this late in the season (Sept.).   Be sure to plant (get out of the pot that will be surrounded by COLD) before significant freezes occur (frost is OK). 
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Dr. Rose-
Occasionally I find a partially broken stem.  Can I bend it back and 'make it right'?

A: No.
The chances of success are very low, and the long term value of the stem low.  Admittedly, I tend to Splint stems that have not fully snapped off, and if I know the break is fresh (i.e. I just broke it!!!!), but his is for scientific data/medical reasons, Not for either expectation or need for success.  YOUR time is probably better spent elsewhere.  The appendage will, at best, be maimed, should it survive.
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Dr. Rose!!!!
What are the best nurseries for roses in the area?

A:  You did not define "the Area".  Your best bet would be to go to the Consulting Rosarians on your website and find one near you.  Give them a personal inquiry.  And then, the criteria for Best deserves focus.  Best plants?  Best value?  Lowest cost (regardless of value)?  Closest to my home?  Best and Quality are two words used too liberally, in our mind.

Dr. Rose:
You had earlier recommended that a Soil Analysis be done.  I Have so done, and the results are generally as expected (good soil, need to bring pH up with some lime, keep fertilizing,,,), but in several rose beds the results for Potassium and Calcium were "Excessive".  The recommendation for other beds to apply 10-10-10 fertilizer in April and July.  For the beds with the 'Excessive" amounts, there is no recommendation for April- but fertilize in July '06 with 10-10-10 (10 lbs. per 1000 sq. ft.).  Would not an application of nitrogen before July be in order?  Is there a 10-0-0 that would help in the spring???

A:  Your question is and excellent one.   I generally agree with you, but don't know of the fertilizers that may be very low in Calcium  (not usually in fertilizers) and Potassium.  Check with the dealers in your area.  And: I will be out of country for a short while.  If others would answer this (if you are knowledgeable) to the web-person then perhaps we can get a quicker grip on the pulse.

Dr. Rose!!:
I use Bonide Fung-onil RTU, Multi-purpose fungicide in the spray bottle. I spray every weekend or after a rain or watering. But I still get Black Spot. I have about 15 roses, but will surely add more next year - I should be up to 20.  Is there a better product?
Thank you!
Linda

A: Fung-onil (Ready to Use) contains the same 'active ingredient' as Daconil 2787 and Bravo     (chlorothalinol).  I do not recommend that as the primary Black Spot preventive spray since I have found it much less effective than some other products, and it can damage leaves (phytotoxic) [very severely if used in higher concentration than prescribed {although not as bad an issue in the Ready to Use form}].  Double Delight is a particular bellwether and will show the effects most quickly.  For a small garden consider Bayer Advanced line of products (available in many garden centers and Lowe's).  Read up on the Internet before going to buy- there are several products for disease, insects, plus fertilizer...   More effective for disease is Banner Maxx.  It comes in pint bottles (available on the Internet from such places as www.Rosemania.com and www.PrimaryProducts.com).  Initially expensive, but will last you for years, and is cost effective (and seems to work better) in the long run.  Due to the tiny amount to be mixed with water, the mixing may be a challenge--- but you need spray only every 2 weeks, giving you time to get up for challenges such as that.
Some info on the Daconil version of chlorothalinol, as quoted from Bob Martin's website "www.roseshow.com" is below:

Daconil 2787 (29.6% chlorothalinol) - Broad spectrum fungicide for control of alternaria leaf spot, anthracnose, black spot, botrytis, powdery mildew and rust with some effect against downy mildew. Known to have phytotoxic effect on foliage. WARNING. Mix 5 teaspoons per 2 gallons.

Dr. Rose!!!
When is it time to protect my rose garden for the winter months?

A: About Thanksgiving weekend, when there have been several solid frosts, and the ground is beginning to freeze.  Look ahead to the weather- if it will not allow the outdoor work that weekend (or you are out of town) then anytime after mid November will usually be fine.  Remember: your goal is NOT to prevent freezing, it is to reduce the frequency and RATE of the freeze-thaw cycles.
 

Dr. Rose!!
As I'm poring over rose catalogs, I cannot help but notice how tidy and orderly their gardens are. Yes, I realize they're growing under ideal conditions and there's a staff of gardeners on hand, but my roses are like crazy, wild animals compared to these domestic beauties. One of mine shot up to about 7' and trimming it back was like cutting down a small sapling. Others seemed to be in a race to match it. And these are not varieties that are supposed to grow that tall (over-fertilizing aside, *ahem*). Would it be advisable to keep these critters cut back to about 4 feet, even if it's a taller variety? Will this affect the blooms? I always hate to trim back because it means cutting off some buds.
Linda

A: Too much nitrogen can cause this, but other causes are development of a climbing sport (rare), "blind shoots" which can grow very long, but don't flower (cause unknown, but happens with some varieties (Chicago Peace, e.g.)), and roses that really 'want' to be trained horizontally (like a climber) in order to provide more blossoms.  Some tall HT's actually can grow so tall that you can't appreciate the blooms properly (e.g. Folklore).  Your call, but I would advise that if the blooms suit you, let it grow as it wants.  If you'd like stronger canes and more blooms, and if the winter does not create dieback, then consider pruning the height by 1/3 in April.
Don't worry about what the catalogs (photos from the South and California) show.  Enjoy YOUR garden!

 

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