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Applying dormant spray is one of the best things you can do for your rose bushes during winter. We recommend using a Dormant Spray Oil mixed with a Contact Fungicide.
Why Use Dormant Spray?
- It is a desiccant that will dry up the remaining leaves on your bushes. This is especially helpful in climates that have warm winters in that it will help the bush drop its leaves and go dormant.
- The Dormant Oil will smother any spider mite eggs or other detrimental insect eggs and larva that are overwintering in your rose bushes and garden mulch.
- The Fungonil, or contact fungicide of your choice, will dry up any fungal spores that are still lingering on your plants and in your garden mulch.
- By eradicating fungal spores and insect eggs, it is less likely the first rain of the season will splash the trouble-making spores and eggs back onto your bush.
How to Use Dormant Spray:
- Mix up 3 Tablespoons of Dormant Spray, 2 1/4 teaspoons of Fungonil, and 1/2 teaspoon of Spreader Sticker with 1 gallon of water.
- Spray bushes AND the mulch surrounding the roses.
- Wait 2 weeks and apply for a second time if blackspot, downey mildew, or spider mites were an issue during the previous growing season.
In our agreement, you do the spraying. Am I correct in assuming that includes the dormant spray?
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Witherspoon Rose Culture replied:
Yes, that is included! ________________________________
This is the first winter for my climbing rose. Do I prune it back? If so, how much? Thanks.
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Witherspoon Rose Culture replied:
It is not necessary to prune your climber in the first season. You could do some tidying up if that’s needed and clean up some pieces that are drooping, broken or growing awry.
In zone 8B. My roses still have all their leaves and on a few still flowering. Should I trim and take if the leaves and use the sprays
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Witherspoon Rose Culture replied:
The dormant spray will help the rose drop its leaves so I would definitely recommend doing that this month. The dormant spray will also likely stop any more flowering for the next few weeks. I would go ahead and cut them back before you spray (save on some spray with less bush to cover).
I have not cut down my roses to 36” yet, should I still do that now before the dormant spray? Or would they incur more winter injury? Where can I buy spreader sticker? Thanks for the informative post!
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Witherspoon Rose Culture replied:
I would go ahead and cut them back. It won’t do any damage and it will save you some spraying with less bush to cover 😊. We carry the spreader sticker here: https://witherspoonrose.com/collections/plant-protectants-chemicals/products/ch-spreader-sticker-8oz?pos=1&_sid=b6bb609f4&ss=r
Your website has a lot of good info on it. I am trying to salvage some old roses that I thought were dead they came back and bloomed this year hoping to transplant them this fall and keep them alive if possible.
Is Neem Oil a good dormant spray for this purpose?
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Witherspoon Rose Culture replied:
Neem oil is a common product some folks use. You will want to check the label to see about using it with a contact fungicide. The Hi-Yield product called Dorman Oil is our number one choice.
Yes, where to purchase the dormant spray and fungonil? Also, when to order several fragrant cloud roses for planting in Elkin, NC? Thanks, Bill Blackley
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Witherspoon Rose Culture replied:
We sell both Dormant Oil and Fungonil online and in store. We are accepting orders now for roses. Are you wanting to have bareroot roses shipped?
Hi- where would I buy both the dormant spray and the fungonil? I have the spreader sticker from the mixytre that I purchased from you (Captan, Thiomyl, Bondie Systemic Insecticide, spreader sticker) for the “usual” insect control. Please advise and thanks so much!
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Witherspoon Rose Culture replied:
We carry both products online or in our garden shops!