Algae lime - composition, benefits and application

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Algae lime - composition, benefits and application: lime

Using algae lime as a fertilizer, you manage the plants in your garden in an ecological way. The pure natural product actively supports you in the natural cultivation in your garden. The versatile and all-natural fertilizer is easy to use and gives you the peace of mind to do the best for your plants. Especially the vegetables appreciate the ingredients and reward it with good growth and rich yield. It also improves the soil quality and can prevent soil fatigue. Here we explain the practical applications and show you in which respect algae lime is valuable for your garden.

Origin and composition

Algae lime is a pure natural product, which is obtained from the deposits of red algae (Lithothanium Calcareum). The sediments are finely ground to a fine powder, which can be dissolved, but also serves as dust for insect repellent. In addition to the powder, the trade also offers granules for spreading. It is therefore a renewable resource. Algae lime has a relatively consistent composition that offers a number of advantages in its combination. The composition in detail:
  • 70 - 80% calcium carbonate
  • 8 - 10% magnesium
  • 3 - 4% silica
There are also valuable minerals and trace elements such as boron and iodine. Due to the optimal mixing ratio of lime and magnesium algae lime is suitable for fertilizing all plants that do not prefer acidic ones. Rhododendron, for example, should not be treated with that, he values ​​an acidic soil. The granules are well suited for distribution in a spreader, while the powder can also be used well for pollination in prevention.


Algae lime can be used throughout the year as a fertilizer, it can easily be mixed with the new planting of shrubs and shrubs with the excavation, so that an additional fertilizer is unnecessary. In addition, lime addition to very basic soil is a good way to change the pH. When fertilizing algae lime in the spring, the soil heats up much faster when the sun's rays set in, which is beneficial for the activation of soil organisms and microorganisms. They develop their activities faster and improve the soil quality. This loosens up the soil and facilitates the growth of the plants, in addition, the lime helps in the breakdown of nutrients.
Due to the composition of the pH of the fertilizer is very high, it can therefore also be used to prevent the spores in the event of a possible fungal infection. This prevents the spread of fungi and facilitates the control of the disease of the affected plants. In addition, there is a high resistance to pest infestation and viral diseases. A pollination of the plants helps against late blight, mildew and scab. Algae lime can also prevent infection by Colorado beetle, leek moth and earth fleas.

Algae lime frog

The application of algae lime also provides for improved taste in fruits and vegetables, which is why it is used particularly frequently in kitchen gardens. Algae limestone is recommended especially for potatoes. They germinate more easily, have a very aromatic taste and develop a high resistance to scab and nematodes. In addition, the shelf life is increased.
  • dust the plants in the vegetable garden only thinly, in order not to impair the photosyntese and the respiration
  • to pollinate the plants select a windless day
  • mix algal lime when spreading compost, adding value to the soil
  • when spreading around the crops, infestation by caterpillars can be prevented
Tip: When composting it is recommended to mix algae lime in order to accelerate the rotting process. Algae lime binds organic acids during the reaction.

Use on lawn

Lawn is often infested by moss and weeds in spring, and the soil may be too acidic here. Without treatment, the moss comes again and again, and then the lawn can not prevail against the numerous weeds. Treatment with algae lime in early spring - after the first scarifying and removal of the moss - balances the base balance of the soil so that nutrients can be better absorbed and the moss will not return. It is important to treat the lawn first and then to lime. Only then can the plants concentrate on utilizing the fertilizer. It takes a few weeks for the acid-base balance to be balanced again, but then the lawn has more space and rewards you with fresh, dense greenery without disturbing moss.
  • Large lawns should be fertilized with a spreader, algae lime is recommended as granules
Possible disadvantages
Many garden soils already have a high lime content, here no algae lime should be used. When spreading, it must also be noted, which plants can not tolerate fertilization with algal lime.In addition to rhodendrons, these are also azaleas, Douglas firs and hydrangeas. If used improperly or overused as a preventative pesticide, algae lime may cause the plants to become ill, so careful use is required.
  • use exactly according to dosage instructions, too much algae lime can inhibit the growth and make the soil basic
correct application
When used for the first time, the seaweed lime is diluted with water, with 10 - 15 kg expected to cover 100 square meters. For subsequent use, for example, for Nachdüngen, the amount of 3 - 8 kg per 100 square meters is sufficient. The amount is based on the soil quality. If you are unsure about how your soil is supplied with nutrients, you can do a simple soil test. For more detailed results, however, a detailed soil examination is recommended. As an addition during composting, you should calculate 3 kg of algae lime per cubic meter of compost.
The use of algae lime as natural fertilizer is not only beneficial in organic farming. The combination of calcium, magnesium and valuable trace elements improves the soil quality, stimulates growth and provides a strong aromatic taste, especially with vegetables and fruits. At the same time, the plants are strengthened and are therefore more resistant to attack by pests, fungi and pathogens. Algae-lime-pollinated plants can repel pests. Caution is advised for plants that prefer an acidic soil, here the application should be omitted. Properly used algae lime is also a good tool for composting. Lawns can be liberated from nuisance moss with the help of algae lime and find their way back to strong green and healthy roots.

Worth knowing about algae lime in brief

Algae lime frog

Algae lime helps prevent trace element depletion, consisting of dead coral algae deposits and composed of 80 percent lime, 10 percent magnesium and 4 to 5 percent silicates, as well as many trace minerals such as boron and iodine. In addition to its ability to prevent trace element deficiency, algae lime is also characterized by the fact that insects, such as earth fleas, Colorado beetle or the salmon moth, can be distributed. Also harmful fungi such as late blight, mildew or scab can be prevented by algae lime, because due to the high pH, ​​the fungal spores can not germinate.
  • Used as a precaution, algae lime ensures that the plants develop a higher resistance against fungal and viral diseases as well as pests.
  • Furthermore, the algae lime makes the fruits and vegetables tastier and the shelf life improves.
  • Especially with potatoes, it was observed with algae lime that they have a higher germination capacity and their taste improves.
  • Furthermore, the treated potatoes were very resistant to scab and nematodes.
  • Algae lime is available in a powdered form, with 200 to 300 grams mixed with 20 to 30 liters of water depending on the manufacturer's instructions. The liquid is then added either directly to the plants as fertilizer or to the compost. Furthermore, you can sprinkle the powder directly on the land.
  • Algae lime can be applied throughout the year. It should be kept in mind, however, that too frequent an application can prevent the plants from breathing properly. Three to five kilos per year are completely sufficient for most algae limestones. Therefore, you should definitely consider the individual manufacturer's information.
  • It should also be noted that algae lime should not be used to fertilize acid-loving plants, such as rhododendrons, because the high lime content increases the pH in the soil.
  • The costs for algae limestone are limited, because on average costs one kilo 2.50 euros.

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