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The Plantura Organic hydrangea fertilizer does not contain any animal ingredients, but is made up of 82 percent vegetable substances from the food, luxury and animal feed industries (etc.) a. Soy flour and cocoa shells) and mineral components such as kieserite, iron sulfate and rock phosphorus. The manufacturer completely refrains from using genetically modified ingredients. This makes the product suitable for natural gardening, and it is also approved for ecological agriculture. According to the manufacturer's information, the hydrangea fertilizer is suitable for all types of hydrangea. Furthermore, due to its biological composition, the granules are harmless to pets and garden animals.

The special liquid fertilizer from the manufacturer Compo is suitable for planted in pots as well as in the garden Hydrangeas of all kinds and sorts. You can also use the product for other bog plants such as rhododendrons, azaleas, Camellias, Blueberries or even magnolias. The nutrients it contains are immediately available to the plants. However, there is no long-term effect, which is why weekly fertilization - in the case of an iron deficiency (recognizable by very light-colored leaves) even every three to five days - useful during the main growing season between April and August is.

The organic-mineral hydrangea fertilizer from Dehner contains a large part of natural chicken manure, the one with vegetable manure Substances from the food, luxury and animal feed production as well as fast-acting, mineral NPK components mixed became. Further components are earthworm humus and mycorrhizal fungi, which have a positive effect on microbial life in the soil and are supposed to support humus formation. In their Amazon customer ratings, users are very positive about the product. Several customers reported that they could have saved older, severely neglected hydrangeas themselves. Of course, this hydrangea fertilizer is also suitable for other bog plants that have similar requirements as the popular flowering shrubs.

Purchase criteria

Fertilizer form

Solid fertilizer: Solid fertilizers are mostly available in low-dust granulate form and can be used in a variety of ways. When planting, you can give the fertilizer granules directly into the planting hole as a starter fertilizer for established plants work lightly into the soil (do not forget to pour vigorously!) or dissolve in water and like liquid fertilizer use.

Liquid fertilizer: Liquid hydrangea fertilizers are easy to dose, also penetrate quickly to the roots and the nutrients they contain are immediately available to the plants. However, many liquid fertilizers have no long-term effects and must therefore be administered regularly (usually once a week).

Type of fertilizer

Organic fertilizer: Those who want to cultivate their garden in a natural way prefer to use organic hydrangea fertilizers. These consist of plant and / or animal substances that slowly decompose in the soil and gradually release the nutrients to the plants. Organic fertilizers have the advantage that they promote microbial life in the soil and thus the natural formation of humus. They have a natural long-term effect and therefore only need to be administered two to three times a year.

Mineral fertilizers: Purely mineral hydrangea fertilizers, on the other hand, do not contain any organic components. These fertilizers provide the plants with an immediately effective mix of nutrients, but usually have no long-term effects and must therefore be administered regularly. In addition, they have no positive influence on soil life.

Organic-mineral fertilizers: Organic-mineral hydrangea fertilizers, on the other hand, contain both organic and mineral ones Components, which is why they combine the advantages of both types of fertilizer and their respective disadvantages to reduce. Organic-mineral fertilizers provide the hydrangeas with both immediate and slow-acting nutrients and thus have a natural long-term effect.

ingredients

When buying organic resp. Organic-mineral fertilizers you should read the list of ingredients carefully: For example, if you value an animal-free one If hydrangea fertilizers are placed, products with content designations such as "animal substances from the food, luxury and feed industries" should be used. avoid. This is usually slaughterhouse waste. Basically there is nothing objectionable about their use, but some gardeners prefer to refrain from it. However, by “animal by-products” the manufacturers mean farmyard manure, for example chicken manure.

NPK composition and other nutrients

Hydrangea fertilizers are first and foremost NPK complete fertilizer, which contain the three main nutrients nitrogen, phosphorus and potassium in different compositions. The proportion of nitrogen and potassium should be significantly higher than that of phosphorus, and certain trace elements - especially magnesium - are indispensable. Hydrangeas also tend to have an iron deficiency, which shows up in pale, yellowish-discolored leaves. A hydrangea fertilizer containing iron helps here.

frequently asked Questions

Do you absolutely need a special hydrangea fertilizer?

Of course, you don't necessarily need special hydrangea fertilizers. However, deficiency symptoms and other problems - such as a reduced number of flowers - are associated with the Use with poorly compounded fertilizers is more likely, leaving you with an optimal mix of nutrients drive better. This is especially true for Potted hydrangeas, since they are dependent on an external supply.

Can you use the hydrangea fertilizer for other plants?

Hydrangea fertilizers are suitable for all plants that have similar nutritional requirements. Therefore rhododendrons, azaleas, camellias, bilberries (blueberries) and other bog plants can be supplied with this fertilizer. Magnolias - which also prefer a more acidic pH value - also benefit from hydrangea fertilizers, but should be supplied with it less. Hydrangea fertilizer cannot be used universally.

What else can I use to fertilize hydrangeas?

Many hydrangea lovers swear by the flowering shrubs dried coffee grounds to fertilize. This is easily worked into the soil and - as it is organic - gradually releases its nutrients. Coffee acidifies the soil and thus ensures an optimal pH value. However, it is not suitable as a sole fertilizer, so you cannot do without a high-quality hydrangea fertilizer entirely.

Which manufacturers offer high quality hydrangea fertilizers?

There is a large selection of hydrangea fertilizers, which sometimes hide under the names "hydrangea and rhododendron fertilizer" or "bog plant fertilizer". The composition varies depending on the manufacturer. The products of well-known brands such as Plantura, Compo, Dehner, Neudorff or Oscorna are particularly recommended. But manufacturers such as Green24 also offer high-quality special fertilizers for hydrangeas.

Can I use hydrangea fertilizers for all types of hydrangeas?

Hydrangeas are available in a wide variety. The different Species and varieties sometimes differ somewhat in their needs, but they all have these two things in common: the Preference for a slightly acidic soil as well as the need for a certain nutrient composition in the Fertilization. That is why you can use hydrangea fertilizers for all types of hydrangeas.

When to fertilize hydrangeas

When and how often you use your Fertilize hydrangeas, essentially depends on the fertilizer used. In any case, spring fertilization is necessary in April to start the growing season. If you use a hydrangea fertilizer with a long-term effect, the second fertilization takes place in June. You may be able to fertilize a third time at the end of August / beginning of September. Otherwise it has to be fertilized weekly.

equipment

Hydrangea blue / fertilizer for blue hydrangeas

Hydrangeas with blue flowers are particularly popular, but they only retain their attractive color when given certain fertilizers. It is important to have an acidic pH value plus fertilization with aluminum and iron. To achieve the beautiful blue color, fertilize your hydrangeas with a special blue fertilizer. Alternatively, you can also use alum.

Hydrangea soil

To ensure that the pH value is just right for your hydrangeas, you can use a special substrate for both garden and potted hydrangeas. When planting out in the garden, simply mix the excavated material with the special soil. Besides the hydrangea soil is also suitable Rhododendron soil for the flowering bushes - the substrates are composed very similarly.