Correctly chosen soil is the key to good seedlings and a bountiful harvest in the future. But every garden crop needs special care. Regardless of the soil used to germinate the seeds, there are so-called organic seedling killers that should not be added to any type of soil.
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Clay
It makes the soil thicker and coarser, preventing air from reaching the plants, and dries quickly. Therefore, young shoots can die from a lack of nutrients and moisture. Despite the fact that clay contains many minerals, they are not available to plants.
Sand
All types of sand are not suitable for the preparation of seedling soil mixture, because contain a large amount of clay, which does not allow air to pass through and retains moisture, adversely affecting the development of shoots. Also, the sand does not contain nutrients that are necessary for the development of young plants.
Fresh manure
Getting into the soil, manure begins to actively release gases that generate heat, which harms the root system of the shoots. It reacts negatively to overheating and can die at the very beginning of its development. Fresh manure is also dangerous for garden crops that cannot be grown in acidic soil. It can also contain weed seeds, pest insect larvae and infectious diseases.
Compost
In the case of compost, experts were divided. Some believe that it cannot be added to the soil, while others, on the contrary, recommend using it. During decomposition, organic matter generates a large amount of heat, which can damage the roots of young shoots. If the soil temperature rises above + 30˚C, the weak roots of the seedlings die.
Also, as a result of the steaming process that takes place in the compost, nitrogen, which is necessary for young shoots for active growth and development, leaves it. But if the compost is already fully ripe, it will be good for the seedlings.
Sawdust
Sawdust substrate is used for seed germination, because it has a beneficial effect on the root system, giving it access to air and saturating it with the necessary moisture. In addition, seedlings that are grown in fresh sawdust can be easily transplanted into the soil without damaging the young roots. But since it does not contain useful minerals, it cannot become a full-fledged analogue of soil. Seedlings that are grown on sawdust grow slowly, have a yellow tint and thin, weak stems.
The seeds that fall into the sawdust at first actively germinate, feeding on useful substances, but as soon as their supply runs out, the shoots are transplanted into the prepared soil mixture.
Tea brewing
It can replace peat tablets, and large leaf tea is more suitable for growing seedlings, which contains many useful substances. Used tea leaves are poured into the soil mixture and the seeds are sown. After they germinate, they are transplanted into another soil.
But since The brew is an organic product and has its drawbacks. If it is decomposing, the heat generated by it can destroy the plant roots. Therefore, before using the tea leaves, it must be well dried. If the first signs of mold development have begun to appear on it, it is not suitable for seedlings.
Coffee grounds
Coffee contains a large amount of minerals, so coffee grounds that have lost their acidity during the brewing process can be used to fertilize the soil. If the thick is poorly dried, it will become a breeding ground for fungi that will destroy young shoots. Coffee also makes the soil heavier, slowing down the germination process.
Straw
In the process of active decomposition, the straw begins to release a large amount of heat and various types of acid, detrimental to the fragile root system, so straw can be used only after it has been completely processed microorganisms.
Fallen leaves
From fallen leaves, humus can be prepared, which is useful for most garden crops. But if the leaves have been infected with fungi or infectious diseases, humus becomes dangerous for seedlings.
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Read more:Seedling picking - what is it and why is it needed?
