How often should cosmos be watered, and what to do about yellow leaves

Today I'm introducing a fairly easy-to-grow flowering plant, and that is cosmos. It originated from the region of Mexico, and in recent years it can be easily bought in places like Beijing, Tianjin, Shandong, Shanxi and other areas in China. Its appearance is small and delicate, and when it blooms the flowers are abundant, just like a young girl dressed in clothes of various colors, full of charm in countless ways.

In terms of cosmos care, it needs relatively more light and a well-ventilated environment. So it is best to grow it on an outdoor balcony; if it can only be grown indoors, try not to keep it in a dark place for a long time, otherwise the leaves are prone to turning yellow due to lack of light. However, in summer, because the light is very intense, you also need to provide shade for it at this time, otherwise overly strong light harming the cosmos leaves can easily cause them to drop.

So are northern cities suitable for growing cosmos? In fact, most flowering plants that can bloom are relatively afraid of cold, so in the severe cold of the north you need to pay attention to indoor temperature. However, growing it in the north also has advantages: most of the north is in the temperate zone, with a warm and dry climate, and these conditions are still fairly suitable for cosmos growth.

What should be noted about daily watering? Cosmos is naturally fond of a moist environment and has a relatively large demand for water, so it needs to be watered regularly. If it is in a dry state for a long time, the leaves will turn yellow. To judge whether it lacks water, you can touch the soil with your hand; when it is relatively dry, you need to replenish water in time. However, you should not water too much at once, because too much will cause the root system to become blocked, leading to rot. Generally speaking, if large areas of leaves appear, you should consider replanting, or you can often loosen the soil and place it in a ventilated spot to let the water inside evaporate.

For plants that can bloom, fertilizing is very important. Cosmos grows relatively fast, so it also needs relatively more nutrients. If fertilizing is insufficient, cosmos is prone to showing a state where the whole plant looks listless. Therefore, when fertilizing, it is recommended to apply thin fertilizer frequently; before use, pay attention to checking the concentration in the fertilizing instructions, so as not to burn its roots. If yellow leaves have already appeared, it is recommended to use a fertilizer that does not need dilution; there is no need to worry about the concentration ratio, and it can be sprayed directly. As long as the nutrition is comprehensive, it will gradually recover its vitality in about half a month.