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Avatar for oakslesly
Feb 28, 2021 2:38 PM CST
Thread OP
Ventura County, California
Zone 10 Ventura County, CA
Hello. I read that roses thrive with a fertilizer of an 8-20-40- formula. I am unable to locate this fertilizer ratio. Is anyone aware of such a product? Any help would be greatly appreciated.
Always seeking recommendations and advice. I welcome suggestions for heat loving roses with great scent, disease resistance, and long vase life.
Avatar for RpR
Feb 28, 2021 2:50 PM CST
Name: Dr. Demento Jr.
Minnesota (Zone 3b)
this wasn't from the mother of an ex-husband? Blinking

All nutrients in fertilizers should be present in appropriate ratios to each other so that they can be efficiently used by plants. For roses, the best ratio for nitrogen, phosphorus and potassium is 1 : 0.8 : 1.8.

https://intermag.eu/news/ferti...
Avatar for oakslesly
Feb 28, 2021 3:30 PM CST
Thread OP
Ventura County, California
Zone 10 Ventura County, CA
Thank you. My first reaction was of disbelief, but two people on the HMF rose comment section supported this. I tried to double check the ratio with the author of the post, but never got a response.
Any organic fertizer suggestions?
Always seeking recommendations and advice. I welcome suggestions for heat loving roses with great scent, disease resistance, and long vase life.
Avatar for RpR
Feb 28, 2021 3:48 PM CST
Name: Dr. Demento Jr.
Minnesota (Zone 3b)
I use dried blood and chelated iron, along with , from the farm, Sheep manure on occasions.

Cow manure is the best manure for roses and I use it bagged when planting roses.

This site gives you a good idea what is out there..
http://www.rosemagazine.com/ar...
Avatar for oakslesly
Feb 28, 2021 5:43 PM CST
Thread OP
Ventura County, California
Zone 10 Ventura County, CA
Thank you so much for your suggestions. I would love to be able to use the same products, but our dogs would have a great time rolling in and eating the manure. I am considering alfalfa pellets --
Always seeking recommendations and advice. I welcome suggestions for heat loving roses with great scent, disease resistance, and long vase life.
Avatar for MsDoe
Mar 1, 2021 9:00 AM CST
Southwest U.S. (Zone 7a)
Hello Rose Grower!
I've tried manure, blood meal, and bone meal. The dogs had a ball, dug it up, rolled in it and ate it (and the soil it was mixed in). They're also not above munching on alfalfa pellets. Then I tried it all in the front yard, where the wildlife did the same. (Coyotes?)
I'd suggest just using a commercial rose fertilizer, whatever is available locally. It's really not critical. I do stay away from the multi-pesticide products, but some rose growers swear by them.
Oh, and get some other toys for the dogs!
Avatar for luis_pr
Mar 1, 2021 1:34 PM CST
Name: Luis
Hurst, TX, U.S.A. (Zone 8a)
Azaleas Salvias Roses Plumerias Region: Northeast US Region: New Hampshire
Hydrangeas Hibiscus Region: Georgia Region: Florida Dog Lover Region: Texas
The NPK Ratio to be used should also take into account what nutrients your soil is high/low of (you will need to make a soil test). But when you get recommendations, also consider that some people exhibit roses and they tend to use larger NPK ratios to get more bloomage or because their soil is low in some nutrients. If you find one that works for you markedly, stick with it. If someone recommends me a certain number for a certain plant, I do not fixate on an exact number match. So for example, if I needed a 8-20-40 fert and there was a 7-20-40 or a 4-10-20 fert, I would consider those.
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Mar 6, 2021 2:37 PM CST
Name: Rosemary
Sacramento, CA (Zone 9b)
Thought I would use this recent fertilizer thread to ask a question of my own. Today, I saw that someone had donated some 16-9-5 fertilizer for the rose garden where I volunteer. I'm thinking it's probably left-over from a recent grass planting (for hay, etc.) in the area. Thoughts? Thank You!
Avatar for RpR
Mar 6, 2021 4:18 PM CST
Name: Dr. Demento Jr.
Minnesota (Zone 3b)
If not combined with other mostly nitrogen free fertilizer you will get very green very bushy roses with fewer blooms. I tip my hat to you.
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Mar 6, 2021 5:31 PM CST
Name: seil
St Clair Shores, MI (Zone 6a)
Garden Photography Region: Michigan Roses
I've always heard that roses like a very balanced fertilizer like 10-10-10. I would think that anything with one number much higher than the rest would be lacking in something the roses need for healthy growth and blooming.
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Mar 6, 2021 7:01 PM CST
SW Ohio River Valley (Zone 6b)
Would it make sense to use that with spring growth? And then switch to a more balanced fertilizer? Just wondering.
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Mar 7, 2021 1:39 AM CST
Romania, Mures (Zone 6b)
Region: Europe Roses Sedums Sempervivums
Isn't using a nitrogen heavy fertilizer going to encourage more fungal and bacterial issues?
Or that is going to happen only in certain contexts?
Just asking.
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Mar 7, 2021 12:49 PM CST
Name: seil
St Clair Shores, MI (Zone 6a)
Garden Photography Region: Michigan Roses
Heavy nitrogen encourages green leafy growth. If more leaves encourages more disease I can't say.
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Mar 7, 2021 1:10 PM CST
Name: Rosemary
Sacramento, CA (Zone 9b)
There is an organic fertilizer that is 9-6-6 and says "Great For Roses." Can be applied dry or as a tea. Thoughts?

Also, would any fertilizer that is advertised as being good for tomatoes also be suitable for roses do you think? Thank You!
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Mar 7, 2021 1:20 PM CST
Name: seil
St Clair Shores, MI (Zone 6a)
Garden Photography Region: Michigan Roses
You know, I've used every fertilizer in the book. I usually get what ever is available and on sale when I need to buy. I've used vegetable fertilizer, lawn fertilizer, rose food, anything and everything. They eat it up. The roses love it all. They aren't all that picky, just hungry! Feed them! They will thank you with lovely blooms in the end.
Avatar for RpR
Mar 7, 2021 1:29 PM CST
Name: Dr. Demento Jr.
Minnesota (Zone 3b)
Seil is correct; I generally try to use specific fertilizer , or at least have it on hand but at times I use what I have without problems.
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