With the right flower fertilizer, you provide your plants with all the nutrients they need to be happy in life. You can find out what to look out for when buying a fertilizer and which products are particularly recommended in our guide. We also explain what needs to be taken into account when fertilizing.
If you want to enjoy flowers for a long time, you need to "feed" them well
Our recommendations
our recommendation
DÜNGME organic universal fertilizer with long-term effect, 100% vegetable & organic, plant fertilizer, for strong plant growth, safe for children & pets, natural fertilizer for healthy soil, 5kg
19.99 EUR To the product| kind | organic |
|---|---|
| consistency | pellets (solid) |
| organic | Yes |
| Shares NPK | 2 % - 1,5 % - 5,5 % |
| capacity | 5kg |
| price/kg | about {PRICE/5} EUR |
The reviewers at Amazon are enthusiastic about the DÜNGME organic universal fertilizer. As far as the quality and impact on the plants is concerned, there is only praise from the buyers and users of the product. They also mention the plastic-free packaging, the simple dosing and the low price for the value as special advantages.
our recommendation
COMPO flower fertilizer with guano for all indoor, balcony and patio plants, special liquid fertilizer, 5 liters
24.99 EUR To the product| kind | organic-mineral |
|---|---|
| consistency | fluid |
| organic | no |
| Shares NPK | 4 % - 5 % - 6 % |
| capacity | 5L |
| price/l | about {PRICE/5} EUR |
With the organo-mineral flower fertilizer (€1.95) from COMPO you are always on the safe side if you can trust the Amazon reviewers. The very even proportions of the main elements and the simple application speak for the liquid fertilizer. And what is most important: The flowers thrive - quote - "splendid".
our recommendation
Dehner flower magic special fertilizer, 1 kg, for approx. 1,000 l
8.99 EUR To the product| kind | mineral |
|---|---|
| consistency | granulated |
| organic | no |
| Shares NPK | 15 % - 10 % - 10 % |
| capacity | 1 kg |
| price/kg | approx. EUR {PRICE/1} |
The high NPK concentration of Dehner's special fertilizer is impressive. This ensures that flowering plants bloom as beautifully as possible. Many reviewers on Amazon confirm this. Although the price per kilo is significantly higher than the other two recommendations in our comparison, the flower fertilizer also has by far the best composition. But: Since the fertilizer is mineral, you should never use it excessively - this could damage the soil/soil in the long term.
Purchase Criteria
kind
One differentiates
- organic,
- mineral and
- organic-mineral
flower fertilizer.
Organic flower fertilizers: They are considered “natural fertilizers”. The nutrients cannot be used immediately by the plants, but must first be extracted from their organic structure by them or the soil. Only then are the substances available for the roots to absorb. Many chemical reactions in the earth are involved in the “dissolving process”. This is why organic fertilizers take longer to work. The effect also lasts longer. Attention: In the case of an acute lack of nutrients, organic flower fertilizers are not suitable!
Mineral flower fertilizers: In these, the nutrients from fossil deposits are broken down and are therefore already contained in their "pure" form. The "nutrient salt" acts faster - that is, the nutrients are released more quickly. Another advantage: This type of flower fertilizer usually costs less than organic flower fertilizer. It is particularly useful as a starter fertilizer and in the event of an acute nutrient deficiency. The disadvantages of this type of fertilizer: Danger of over-fertilization, only short-term effect, sometimes toxic.
Organic-mineral flower fertilizer: These are made up of both types of fertilizer and thus combine the advantages - pushing back the respective disadvantages. One could also speak of the “golden mean”.
consistency
Flower fertilizer comes in liquid and solid (granulated) form.
liquid fertilizer: You simply mix this into the irrigation water and feed it to the respective plants. Advantage: particularly simple application. Disadvantage: relatively frequent, continuous fertilizing required.
granular fertilizer: You work this directly into the potting soil. Advantage: fertilizing only necessary every six months (slow-release fertiliser). Disadvantage: careful dosing and thorough, even incorporation are elementary.
tips
There are also powder and pellet variants of solid fertilizers, which you can often simply dissolve in irrigation water.
organic quality
We recommend buying organic quality flower fertilizer. There are two main points in favor of this: On the one hand, you can be sure that organic flower fertilizers do not contain any substances that are harmful to health; on the other hand, any pets have nothing to fear even if they should lick the flower fertilizer.
our recommendation
Undergreen by Compo Jungle Fever, food for all green plants in the room or on the balcony, organic liquid fertilizer, 400 ml
7.99 EUR To the productcomposition
The most important substances for plants are nitrogen, phosphorus and potassium. The trade has fertilizers with different compositions ready. Roughly one differentiates:
- Complete fertilizer (NPK fertilizer* - contain all three of the above substances)
- Bi-nutrient fertilizers (contain two of the above substances)
- Straight fertilizers (contain one of the substances mentioned above)
* The letters N, P and K stand for nitrogen (chemical element symbol = N), phosphorus (P) and potassium (K).
Complete fertilizers are the best and preferred flower fertilizers. But: If a plant does not necessarily need one or two of the substances extra, the gardener can also use a two-nutrient or single-nutrient fertilizer. The latter is in high demand when it comes to combating an acute nutrient deficiency.
our recommendation
Substral Naturen organic plant food, purely plant-based, vegan universal liquid fertilizer for ornamental plants, fruit and vegetables in buckets on the balcony, terrace and garden, 2 liter canister
15.49 EUR To the productThe percentage distribution of the three main components varies from fertilizer to fertilizer. It does not necessarily have to be very large proportions. The individual nutrient requirements of each plant decide how much of which element should be included. It is best to check whether the respective fertilizer is explicitly recommended for your plant species.
Tips:
- The content of the three substances mentioned is always higher in granular fertilizers than in liquid fertilizers. This is because they are administered less frequently.
- Rule of thumb: nitrogen-rich fertilizers for plants that should grow well and where the leaves are in the foreground ("green manure"); phosphorus-rich fertilizers for plants that are intended to flower and bear fruit ("blooming fertilizers").
capacity
Of course: the more flower fertilizer the respective container holds, the longer you can get by with it. In addition, the price per liter often becomes cheaper as the quantity increases.
But: In the end, the decisive factor is always the quality of the fertilizer. It is better to use less high-quality flower fertilizer than a lot of lower-quality flower fertilizer. This means that you shouldn't prefer the most bulging fertilizer, but rather the best compounded fertilizer.
frequently asked Questions
What is flower fertilizer?
Flower fertilizer refers to a liquid or granulated agent that provides plants with exactly the nutrients they need.
In addition to universal fertilizers, there are also special fertilizers that are tailored to the specific needs of certain plants (groups): for example orchid fertilizer, rose fertilizer, (12.86€) rhododendron fertilizer et cetera.
What substances does flower fertilizer consist of?
The main components of flower fertilizer are nitrogen, phosphorus and potassium. Their main tasks at a glance:
- Nitrogen: promotes plant growth
- Phosphorus: important for root, shoot, flower and fruit formation, increases drought resistance and winter hardiness of plants
- Potassium: strengthens cell walls, makes plants less susceptible to disease, promotes sound water balance
In addition, flower fertilizer contains calcium, magnesium, sulphur, some iron and trace elements.
For which plants is flower fertilizer suitable?
In principle, you can use flower fertilizer for any of your indoor, balcony and bed plants. Depending on the specific composition, they are better for some plants and less suitable for others. Always take into account the information/recommendations of the manufacturer.
How often do I have to supply my plants with flower fertilizer?
This depends on the one hand on the type of fertilizer and on the other hand on the plants. Most liquid fertilizer manufacturers recommend applying them every one to four weeks. In contrast, granular fertilizer is normally only incorporated every six months, as it is a long-term flower fertilizer.
Important: Basically, you should only fertilize your plants within or during the vegetation period (from March to September).
youtubeHow do I recognize nutrient deficiencies in my plants?
Depending on the specific defect, different identifying features appear:
Plant grows extremely slowly? It has very small, lighter and maybe yellowish leaves? Do the leaves dry up and fall off? Is fruit formation visibly restricted (which also negatively affects yield and fruit quality)? In all these cases, there is probably a nitrogen deficiency.
Does the plant seem to stay small all the time? Are the leaves changing colour? Then a phosphorus deficiency can be responsible.
Do you spot brown leaf edges and tips? Is the plant sick? There may be a potassium deficiency.
tips
If it becomes apparent that your plant is suffering from a specific deficiency, you should treat it with an appropriate single fertilizer.
Caution: You can also over-fertilize plants. So don't overdo it, because too much of a good thing is also harmful!
Which brands offer high-quality flower fertilizers?
Many well-known brands produce high-quality flower fertilizers. These include, for example:
- COMPO
- substral
- stretcher
- FERTILE
Where is the best place to buy flower fertilizer?
You can find high-quality flower fertilizers in garden centers, flower shops and hardware stores. However, you have the largest selection at Amazon.
How much does flower fertilizer cost?
Depending on the type, consistency, composition, quality, filling quantity and manufacturer, flower fertilizer generally costs between five and ten euros per liter.