Zimmerfarne - location, care and propagation

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Ferns are not just primeval, they are actually. After all, they have been thriving here on Earth for over 300 to 400 million years. Nevertheless, especially the so-called Zimmerfarne prove to be far less robust than is commonly assumed. Nevertheless, a Zimmerfarn can be several decades old with proper care. What this care looks like, you will learn here.
As can be proven by fossils, there must have been prehistoric whole forests of tree ferns. And even today many forest ferns and shady fields or meadows can be found in many different species of ferns. In terms of biodiversity, it should also be noted that in the Victorian era, special fern hybrids were bred for horticulture and landscaping. In addition to these breeds, so-called "room ferns" have existed for quite some time, most of which have been specially bred for indoor use.
Although furs are distinguished by the fact that they can all thrive in rooms, it can be said that there can be grave differences in terms of the demands that the respective ferns make on their location, soil or care in general. As a result, it is advisable to obtain information directly when you buy. However, if you already have your room fern at home and you can not say with absolute certainty which type of fern it is, you should at least follow the following recommendations and tips.
Tip: Who wants to determine a Zimmerfarnsorte, can simply enter some of the most popular varieties in the favored Internet search engine and match the images found with the corresponding fern.
Popular varieties
  • maidenhair
  • Knopffarn
  • platycerium
  • Hasenfußfarn
  • Hanging sword fern
  • Phlebodium Aureum
  • bird's nest fern
  • Spleenwort
  • Säumfarn
Most ferns prefer slightly moist soils with medium to high humus content, which are as low in calcium as possible. In addition, the soil may also be somewhat loamy. The only important thing is that it is well drained, so that excess fluid can run optimally and the fern roots are sufficiently supplied with oxygen. To improve the permeability of the soil, the Farnerde be mixed with some clay granules. Special recommendation here deserves the so-called expanded clay, which can store water much better than other clays, without drying out the soil too much. In fact, expanded clay has a more regulating effect on the moisture content of the plant soil, as it releases the absorbed moisture gradually as soon as the soil threatens to dry out too much.
In contrast to the fern species growing in the wild in this country, which are mainly to be found in shady to partially shaded places, furs prefer mostly bright sunny locations. It should be noted that even the sun-hungry varieties under the ferns may never be directly exposed to sunlight. In addition, it should be noted that ferns are usually very sensitive to drafts and larger temperature fluctuations. Furthermore, it should be noted that ferns need a fairly high humidity in order to thrive as well as possible, which is why they feel in the experience also in bathrooms particularly well.
Tip: If there is not enough space at a suitable location to set up a sufficiently large flower pot or planter, the fern can also be easily planted in a so-called traffic light. However, as far as possible epiphytically growing ferns, such as the antler fern, the hare foot fern or the goldtail fern, should be used.
to water
Fens usually need a lot of water. Nevertheless, it is not advisable to over-pour, especially since ferns can not tolerate standing wetness. Thus, ferns should be kept exclusively in planters with water permeable soils. Despite the risk of waterlogging, under no circumstances may watering be done too seldom, as the fern roots may otherwise dry out, which could cause the fern to suffer irreparable damage in the worst case scenario. Accordingly, it is recommended to water the fern at the latest when the upper layer of its soil is dry. As an alternative to conventional casting, however, the fern can simply be dipped into water together with its vessel beyond the pot or bucket rim until no more air bubbles rise from the earth. In addition, most species of ferns like it when they are in the shower with lukewarm water now and then "shed" thoroughly. However, the water pressure should not be too high. It should also be emphasized that only low-liming water may be used for watering, bathing or showering of ferns.
Tip: In order to get the lime content of your own tap water experience, usually just a quick look at the official website of the responsible water supplier. In addition, there are in every good specialist shop for plants and garden accessories test strips, with which you can easily determine the exact lime content of water itself.
In itself, the care of furs is limited to a regular watering and an occasional repotting, which should take place at a distance of one to two years. In addition, it is advisable, for reasons of aesthetics, to cut dried fern fronds. A far-reaching pruning, however, is really necessary for only a few varieties. It should be mentioned here that the pruning must be done either in spring or autumn, depending on the type of fern.
Care tip: Ferns love it when their fronds are occasionally sprayed with some water.
The repot serves on the one hand to provide the fern continuously with fresh nutrients. On the other hand, the risk of diseases or pests thereby decreases significantly. Regardless, young ferns that are still growing will eventually need a larger pot to continue growing unhindered.
Tip: Since some fern species are more or less poisonous, gloves should always be worn when repotting and when cutting back.
Although ferns in nature simply multiply via their spores, in the case of ferns it is advisable to deliberately multiply by proper rooting.
Since maiden ferns are in the house anyway throughout the winter, no special winter protection arrangements need to be made. The only important thing is that the ambient temperature does not fall below 12° C and the fern gets enough daylight at its location. In addition, it may be that the room air is a little too dry by the use of the heater, which is why the fern fronds should be slightly more often sprayed with water.
In itself, the risk of pest infestation in the house or apartment is relatively low. Nevertheless, the ferns should occasionally be screened for scale insects, aphids or spider mites. If said pests show, it is usually already completely sufficient to wash off the affected fern fronds thoroughly. If, on the other hand, the soil is infested with pests or mold, it must be completely replaced with fresh soil.
frequently asked Questions
Can I plant my Zimmerfarn in the garden?
Maiden ferns are, with a few exceptions, too sensitive to stay out in the open over the winter months. However, you can put your Zimmerfarn on the terrace or the balcony, if the outside temperatures are also warm enough overnight and the location offers reliable wind protection.
Do fens need to be fertilized?
Ferns must not be fertilized extra, contrary to current recommendations, provided they get enough water and fresh soil. Unless they show clear signs of deficiency and / or are consistently in pure clay granules, although even half of the manufacturer's data on the recommended amount of fertilizer may be more than adequate, even in experience.
What are those dark "clumps" that have formed on the fronds of my fern, and what can I do against them?
According to the description, these are only spores that serve multiplication and thus simply disappear after a certain time.

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