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One of the mainstays of autumn plant care is the proper preparation for frosty temperatures. The linchpin here is a balanced nutrient supply. Now, not lush growth or the lavish abundance of blossoms are the focus. Instead, it is important to strengthen the plants of the garden so that even extreme fluctuations between frost and thawing can not burst the tissue cells. The following instructions show how to fertilize roses, shrubs and conifers in autumn.
Potassium creates hardiness
A look at the composition of special autumn fertilizers shows that potassium is one of the main ingredients. For a good reason, because potassium fulfills many tasks in the nutrient supply of plants. As one of the ten most abundant elements in the earth's crust, potassium has been dubbed 'plant ash' because our ancestors used the ashes of wood as potassium fertilizers. Thus, the nutrient makes a valuable contribution to the transport of water in the plant pathways, optimizes the water pressure in the root and promotes photosynthesis.
The outstanding advantage of potassium for the plant metabolism lies in the strengthening of frost resistance. The element accumulates in the plant cells, whereupon the salt content in the cell juice increases. As is well known, salt in higher concentration always reduces the freezing point. The tissue cells benefit from this effect, so that they can not clog frosty temperatures so fast. In addition, plants supplied with potassium are better equipped to deal with the intensive loads from frost to thaw and vice versa.
Roses, shrubs and conifers fertilize with patent kali
To properly fertilize ornamental plants in the fall, potassium should be present to a sufficient degree. Patentkali has proven itself as a premium preparation among autumn fertilizers for many years. A balanced combination of 30 percent potassium, 10 percent magnesium and 15-17 percent sulfur characterizes the fertilizer. Known under the name Kalimagnesia, the product is widely used both in professional horticulture and in the hobby garden. Unlike cheap offers, Patentkali meets the requirements of salt-sensitive roses, shrubs and conifers. At the same time, the fertilizer remedies the increased deficiency of sulfur, which is less and less abundant as a nutrient in the soil. Together with magnesium, these two nutrients provide a rich leafy green and a colorful flowering. How to properly fertilize your plants with Kalimagnesia:
- Roses between mid and late August fertilize with 40 grams per square meter
- Shrubs and conifers in September / October fertilize with 30-50 grams per square meter
- Apply the water-soluble granules by hand or with the spreading trolley
- Immediately after work with the rake and water sufficiently
Tip: If, during the year, the leaves appear to be dappling on ornamental plants, punctate leaf discolorations or leaf marguerite necrosis, this damage pattern indicates a lack of potassium. Unwanted growth is also due to undersupply of this nutrient. The immediate administration of Patentkali in a dosage of 50 to 80 grams per square meter compensates for the deficiency.
More potassium fertilizers for fall
With DCM Vivikali, retailers offer an option to Patentkali. This product is approved for organic farming according to EU regulation and is used there as an autumn fertilizer to harden ornamental and crop plants. With 20 percent potassium, the preparation is slightly smaller and contains no magnesium.
In addition, where half-dose potassium is sufficient for autumn, polysulphate may be considered. This Kalirohsalz has a very stable calcium shell, which gradually disintegrates. Therefore, the release of the nutrient is distributed more slowly over the winter time. The content of sulfur and magnesium is at the level of Patentkali.
Natural alternative to Kalimagnesia
Environmentally conscious hobby gardeners shy away from the handle to fertilizers from the store shelf. Instead, they rely on self-made fertilizer with all-natural ingredients.The prime example of a potassium-rich fertilizer for fall is comfrey. After spring and summer stinging nettle nourished your roses, shrubs and conifers with nitrogen and phosphorus, comfrey is a logical continuation of the strengthening process before winter. The simple preparation follows this proven recipe:
- All aboveground plant parts are usable
- In the wooden tub in 10 liters of water stir in 1,000 grams of ground comfrey plants
- Cover the jar with chicken wire or a loose lid
- Let it ferment on warm, sunny place for 10 to 14 days
- The addition of stone powder, valerian or chamomile reduces the unpleasant odor
- Stir the mixture daily with a wooden stick
Beginning in late July / early August, fertilize roses, shrubs and conifers every 14 days with comfrey, previously diluted 1:10. For species and varieties that tolerate foliar application, dilute the natural fertilizer in 1:50 ratio.
Tip: If there is a permanent lack of potassium in the garden soil, the compost pile is poured over every 14 days with undiluted comfrey slurry. With every dose of compost, your ornamental and crop plants will automatically receive a portion of potassium without the risk of over-fertilization.
Soil analysis prevents over-fertilization
- 10-15 soil samples are taken from different locations and filled into a container
- Thoroughly mixed, 500 grams of the earth come in a bag
- All important details about the samples are provided by the laboratory via a registration sheet
Potassium reduces winter stress on plants, caused by frosty temperatures and permanent wetness. The natural element strengthens the tissue cells, so that even repeated fluctuations between frost and thaw do no damage. To properly fertilize roses, shrubs and conifers in the fall, Patentkali has proven to be excellent. The fertilizer known as Kalimagnesia also contains sulfur and magnesium, other important nutrients for the cold season and a healthy start to the next season. Biologically oriented hobby gardeners use instead of patent kali self-produced comfrey manure, rich in natural potassium and without the risk of over-fertilization. If there is any need for fertilizers, a professional soil analysis is done every 3-4 years.