The Content Of The Article:
- What makes Rosenerde?
- Do you really need a special "rose earth"?
- Brisantes topic mycorrhizal fungi - alternative: mix rose earth itself?
- Normal garden soil for roses
- The DIN ISO 9001
Rose earth has a very loose structure and high stability. As a result, clumping of the potting soil is prevented and the roots of the roots get a sufficient hold. It is important to note that the soil helps to prevent waterlogging and root rot. This is done by feeding the roots the necessary amount of water and air.
What makes Rosenerde?Rose Soil for starters contains all of the essential main and trace nutrients and supplies the roses for about six weeks without the need for re-fertilization. Roses make special demands on the ph value and so the rose earth is optimally adjusted to the needs and allows a perfect nutrient utilization by the roots. Rose earth consists of:
- Compost produced from shredded, finely sorted pine and spruce bark,
- Mineral fertilizer with trace nutrients
- and finely ground dolomitic limestone.
You can plant roses in a container all year round, but not in frost or midsummer. If it is root-bare rose bushes, these should preferably be planted in the fall and watered sufficiently before planting. In the case of rose replantings on an old rose tree gate, soil fatigue occurs very quickly, which can only be prevented by replacing the soil. For this purpose rose earth is used.
The rose soil should be stored in a cool, dry place and opened pouches should be closed tightly to prevent settlement with sciarid fly larvae.
Do you really need a special "rose earth"?To find out, we took a closer look at one of the commercially available rose earths: the rose earth of a known supplier contains bark humus, wood fibers and coconut fibers, fertilizer and a mysterious substance called Glomus intraradices, How much of each is included, however, the inquisitive consumer does not learn. The Glomus intraradices turns out to be mycorrhizal fungus, a soil-borne root fungus. This has been making a splash in professional circles for several years, the advocacy "application of arbuscular mycorrhizal fungi in horticultural practice" was founded in 1997, which already indicates that it is not an indispensable addition of earth - otherwise probably almost every gardener would ever mycorrhizal fungi used.
There is evidence that supplemental mycorrhizal fungi can promote plant growth, but also studies in which the experimental results have not met the expectations of mycorrhiza (in this case an increase in yield), and then the positive studies are still on certain fungus strains from university inventories as opposed to commercial ones, so the benefit assessment is not that easy.
Brisantes topic mycorrhizal fungi - alternative: mix rose earth itself?The topic can not be exhaustively treated here, but there are indications in the internet that mycorrhizal fungi are more suitable for retailing than for using the plants. In our Earth considered here, we do not know anyway how much and which of these fungi are included, nor how much bark humus, wood fibers and coconut fibers, which are sold here in "light pre-fertilized" with organic NPK and iron fertilizer.
Bark humus is offered for 17 cents per liter, wood fibers are sawdust and chaff, so waste products of the wood industry, which certainly do not cost the world, coconut fiber is available from about 20 cents per liter Earth. One liter of NPK fertilizer is available from € 2.50, 40 g is usually taken for 20 liters, "slightly pre-fertilized" will no longer be safe, so the fertilizer in the soil costs 10 cents. However, 20 liters of earth cost about 8, - Euro, so 40 cents per liter.
For comparison, topsoil with one third of humus costs 15 cents a liter. So for our mix is already called a proud price, but you will be happy for convenience, if you just want to buy some soil for a few pots on the balcony, which can be easily transported as a lightweight substrate in a square bag.
Normal garden soil for rosesIf you need rose soil for one or more beds in the garden, the bill looks quite different, and it quickly raises the question of whether Rosenerde can be made differently. You can, you can certainly rely on the material in which roses have been growing for centuries, namely earth. Normal garden soil that can be adapted to the specific needs of the roses:
- Roses need a loose soil, which is quite nutrient-rich, because they extract many nutrients from the soil during growth.
- So if you want to plant a bed of roses, mix about a third of compost and so much sand under the existing soil that the soil becomes nice and loose.
- Horny shavings, lime or fertilizer may still be helpful, but as many garden soils today tend to be overfertilized, this should be determined by soil analysis.
- Where you can do such a soil analysis, your church tells you that after about three years, this analysis should be repeated to see if your roses need new soil, etc.