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Most of the plants in the garden and in the garden go through a period of vegetative rest during the winter; this garden and garden do not need fertilizing in any way. The fertilizations carried out in autumn are provided to prepare for the future spring development, so that at the end of winter the soil is ready for the great development that the plants have after the winter rest.
Precisely because this type of fertilization must be used in a few months, it is important to use a suitable fertilizer, or something that does not disperse quickly in the soil, making our efforts useless. In spring the plants need mainly nitrogen, because their efforts are tense in the production of new leaves and new shoots; therefore when preparing the soil for the following year it is good to enrich it with a fertilizer with a high nitrogen content, possibly using mature organic fertilizer, because this type of fertilizer keeps the nitrogen available in the soil for a few months; moreover, the organic fertilizer has the undeniable advantage of improving the soil mix, making it easier for plants to develop their root system.
Autumn fertilizations in the garden are fundamental for the success of the following year's crops; moreover some vegetable plants develop during the winter. in both cases a deep processing of the soil, mixing organic fertilizer, will prepare the sowing and planting beds for winter vegetables, and will also allow the land to be ready for spring where we will not grow anything during the winter.
The working of the land in the garden will also allow us to uproot all the plants that are now dried or from which we no longer grow fruit, together with the dry or diseased foliage, the remains of cultivation and weeds. In this way, in spring, there will be nothing left but to lightly clean the plots and sow.
Most houseplants actually do not have a period of complete vegetative rest during the winter; therefore starting in September we will not cease to fertilize them, but we will disperse the fertilizers, also reducing the amount of fertilizer dissolved in the water of the watering; we say that a fertilizer every 20-30 days, with half a dose of fertilizer, is more than sufficient. If in autumn we will have repotted some plants we can avoid fertilizing them, because fresh soil is often already added with fertilizer.
Bonsai are very delicate essences, not intrinsically, but due to the fact that they are placed in very small containers, with a much smaller root system than plants grown in large pots or in the open ground, and with an availability of mineral salts that remains forced. in the small volume of the bonsai pot itself; for this reason the fertilizations are very important, and it is fundamental to avoid excesses and shortcomings. Generally during the autumn the fertilizations are not ceased, but they continue as always, but using a fertilizer with low nitrogen content, since our plants will rarely have to produce new shoots in autumn. As soon as the temperatures drop we avoid fertilizing the outdoor bonsai until spring; for indoor bonsai we reduce the fertilization, also decreasing the quantity of fertilizer supplied.
Autumn fertilizations: Succulent and garden plants
The fat plants, most of the species at least, pass through a period of vegetative rest in winter, during which all development ceases; therefore starting from September-October we can have the fertilizations, until the arrival of spring. The same applies to most orchids.
In winter the garden plants are in vegetative rest, but they prepare them for spring recovery, first of all cleaning the soil around the stems and under the shrubs from the dry leaves, especially if these leaves were attacked during the year by any mushroom; then spread at the foot of the plants some organic fertilizer, earthworm humus or mature manure, a quick hoe and then mulch with bark or other suitable material. In this way our plants will find nitrogen available already towards the end of winter.
If we have some acidophilous plants in the garden, in addition to the manure we also spread iron sulphate and fresh soil, specific for acidophilic plants, on the ground.