Fertilizing roses correctly
Contents
Roses are among the flowering shrubs with high nutrient requirements. Here you can read when and how to fertilize these noble plants properly.
In order for roses to thrive in the garden, they need to be fertilized regularly.
Whether shrub roses, bed roses or climbing roses: only if the plants receive sufficient nutrients do they produce magnificent flowers.
In the following we explain when is the right time to fertilize roses and what is best to do.
Fertilizing roses: The most important facts in brief
- The first fertilization is done in spring after the rose cut in March. The organic fertilizer, for example cattle manure, is spread in the root area of the plants and worked flat into the soil.- After summer pruning at the end of June, remounting roses are given a second application of mineral fertilizer such as blue grain.- Newly planted roses are fertilized for the first time after flowering.
When and how should one fertilize roses?
True fans prefer to use well seasoned cattle manure to fertilize their roses in spring.
It contains about two percent nitrogen, one and a half percent phosphate, two percent potassium and various trace elements - an optimal composition for roses.
With its high fibre content, it also enriches the soil with humus.
If you live in the countryside, you should simply ask a farmer in the vicinity to supply you with a full supply of manure.
The advantage is that the material is crushed equally well by the spreading rollers when it is unloaded and can then be better distributed in the flower bed.
If the cow dung is still fresh, you should let it rot for at least half a year before fertilizing your roses with it.
In spring, after cutting the roses,
spread half a pitchfork full in the root area for each plant and work it flat into the soil with a cultivator so that it decomposes quickly.
Rose-growers who live in the city usually have a procurement and storage problem with cow dung.
However, there is a good alternative in specialist shops: dried, pelleted cow or horse dung.
It is spread like a granulated fertilizer in the root area of every plant and is also worked in flat.
The application rate per square meter of bedding area is about 200 grams.
Fertilise roses organically in spring
Alternatively, you can of course provide your roses with a special rose fertilizer in spring.
However, if possible, use a purely organic product.
Like most flowering plants, roses also have a relatively high phosphate requirement.
This plant nutrient is important for the formation of flowers, but also for the energy metabolism in the plant.
However, if a soil analysis has shown that the phosphate and potassium content of your soil is sufficiently high,
you can also supply the plants with normal horn fertilizer - around 50 to 60 grams per square meter is sufficient.
Horn meal is more suitable for spring fertilization than horn shavings, as it decomposes more quickly and releases the nitrogen it contains.
In principle, it is important for all organic fertilizers to be worked flat into the soil.
Second rose fertilization in summer
Most rose varieties reassemble, i.e. after the first pile they form further flower buds on the new shoots, which still open in summer.
So-called repeat-flowering roses should be cut back slightly at the end of June after the first flowering pile has died down to encourage new shoots.
As this so-called remounting takes a lot of energy, it is advisable to fertilize the plants again immediately after summer pruning.
Since the second fertilization should develop its effect as quickly as possible, rose lovers usually fall back on a mineral product such as blue grain.
However, it is important that you do not apply the second fertiliser too much - it should not be more than 20 to 30 grams per square metre.
If you mean too well with summer fertilization, the shoots will not lignify in time for the start of winter and are susceptible to frost damage.
Therefore, do not fertilize your roses too late - the last fertilization date is mid-July.
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