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Discussion id : 92-466
most recent 1 MAY 16 HIDE POSTS
Initial post 30 APR 16 by perpetua
Hello!I have a question about fertilizing.I use a liquid fertilizer 8-16-42(10g for 10L water) and another one 4-6-8(2caps for 10L) for my very young roses.My question is this-how much to feed one rose?I give 2L/rose bush and 5L/climber of the first and 1L for the very young roses.Is it too much,is it just about enough or is it too little?The amount of liquid indicated for one plant isn't specified anywhere..thank you!
Reply #1 of 5 posted 1 MAY 16 by Give me caffeine
It's pretty much impossible to overfeed roses. They have huge appetites. As long as you're following the recommended mixing rate and not actually drowning the roses, it's unlikely to hurt them. I'd also follow the recommended frequency of feeding.

Amount of water needed will depend on conditions and on the size of the bush. Ditto for amount of food. In hot (Australian) weather I might throw 20 litres of water at a medium size bush in one watering, but they'd only be watered every few days at most. This is assuming they are in the ground, not potted, and are established.

In winter I might not water them at all for a week or two, depending on conditions. Easy way of telling is to stick your finger into the topsoil just beneath your mulch. If the top couple of inches of soil is feeling dryish, water them well. If it's moist, don't bother.

It's a good idea to not just rely on packaged fertilisers and to also give roses a nourishing mulch. Manure is great. Lucerne is great. Lay it on thick if the weather is hot. Roses like cool roots.
Reply #2 of 5 posted 1 MAY 16 by perpetua
thank you for your quick reply!yes,I pretty much know how to water them in between fertilizing,it was the amount of water with fertilizer dissolved in it that was worrying me.good to know they are impossible to overfeed.
Reply #3 of 5 posted 1 MAY 16 by Salix
However, this is not always true for species roses! Rugosas especially seem to resent fertilizer, and prefer manure.
Reply #4 of 5 posted 1 MAY 16 by perpetua
Hello and thank you for your warning,but I don't have any rugosas,as I don't like them that much.I have quite a few climbers and hybrid teas,noisettes,bourbons,hybrid moschatas,floribundas and most of them are young,from 2 months old to 3 year old.
Reply #5 of 5 posted 1 MAY 16 by Salix
I adore rugosas! The thorns do get tiresome though.
Bourbons are especially heavy feeder iirc. Good luck!
Discussion id : 77-330
most recent 25 MAR 14 HIDE POSTS
Initial post 25 MAR 14 by julsz
I just bought a granular fertilizer with 14-14-14 label and another fertilizer that needs to be diluted in water with 15-15-30. Which is better?
Reply #1 of 1 posted 25 MAR 14 by Patricia Routley
A really simplified interpretation of NPK. N = nitrogen (for leaves); P = phosphate (for roots); K = potash (for flowers). It depends on your soil. If you have an excess of potash, then 14-14-14 would do. Roses like potash and if your soil has a deficiency of potash, then 15-15-30 would be better.

I almost never use chemical fertiliser for potted roses. Too burny. I use lucerne hay topped with sheep manure, and once every three months perhaps, 1/4 teaspoon of sulphate of potash.
Discussion id : 67-346
most recent 6 OCT 12 HIDE POSTS
Initial post 6 OCT 12 by OLEF641
I may have posted this before, but I'm not sure.

I used to get a rose fertilizer from Pixie Treasures that Laurie Chaffin mixed herself. I stocked up when she was closing things down, but am running out. I know it was a blend of three ingredients, including blood meal and bone meal, but I don't know the third ingredient nor the proportions thereof, as the label has long since "bit the dust". (I know, I should have gotten the information off before that happened . . . )

I really like this fertilizer, consider it much better than chemical types. Does anyone know what the mix was?
Discussion id : 20-337
most recent 14 JUL 07 HIDE POSTS
Initial post 13 JUL 07 by CarolynB
I have a few questions about fertilizing roses: There is a timed-release “pill” for fertilizing plants (including roses), which it says works for “up to 2 years”. However, I’ve read in this forum that fertilizing should be stopped in autumn to give roses time to “harden off” for winter. I assume the fertilizer pill keeps fertilizing through the winter, since it works for up to 2 years. Is this bad? Or, is hardening off for winter less of an issue in zone 9, where I live? This pill is 20-10-5. Is this a good balance of nutrients for roses? I want to use this fertilizer pill if possible, because it takes a tremendous amount of time to sprinkle granular fertilizer around all my roses every month – but I want to make sure first that the pill is good for my roses.
Reply #1 of 2 posted 14 JUL 07 by Wendy C.
In zone 9, winter generally isn't an issue. The feeder sticks, pills are okay, but I wouldn't consider them a once and done thing for two years.

They provide a steady supply of food, but during bloom season it isn't enough to sustain all the growth. A nice triple 16 lawn food or any balanced flower food would span the gap.
Reply #2 of 2 posted 14 JUL 07 by Cass
Hi, Carolyn,
What's truly best for your roses depends on your garden soils. Wendy is absolutely right: you don't need to worry about hardening your roses for winter in Zone 9.

Agriform tablets include time-release components that won't release too much fertilizer over winter (we hope). As for the estimate of up to two years, I take that will a grain of salt. There are three sizes available. The warmer the soils and the more they are watered, the faster the fertilizers will be released. That's one of the biggest problems with time-release fertilizers: we can't be sure when they're used up without testing the soil, nor can we control the rate of release. For example when the weather is brutally hot in late June and July, roses can take a little snooze. But the fertilizers will be released at the maximal rate at that time - - good for lawns, not good for roses.

If the choice is...I do nothing because I have so little available time...or I use the Agriform tablets, I'd still say use the tablets.

I am firmly contrarian on rose fertilizing. I prefer a product that can be applied once a year (at spring pruning time) and is effective for 6 to 9 months. I consider the nitrogen content of the tablets too high. Depending on the maturity of your garden soils and your location, you might not need potassium or phosporus at all - - or your soils might need greater proportions of both. If your county extension provides free soils tests, that's a service that will give you a lot of information about how to fertilize your roses.
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