It is very common for some plant leaves to turn brown. The spots can appear on the edges and tips, but also in the center of the sheet and spread until they cover the entire surface. Also the petals of the flowers can be affected on some occasions. In Green Ecologist, we explain why do brown spots appear on plants.
Causes of brown spots on plants
In principle, brown spots are synonymous with wilting, but the causes that produce them can be diverse. Drought it is perhaps the most common; When a plant does not have enough water and withers and the first symptom is the appearance of brown spots that cover the entire leaf, until it is dry, falls to the ground or breaks as soon as it is touched. But also the scorched (excess heat), frost and some fungi they can cause the appearance of brown spots.
Excess heat
Scorching produces brown spots on leaves, which are wrinkled. This phenomenon takes place when the solar rays are very strong. The effect is doubled if the sheets are wet.
Very high temperatures in a closed environment such as a greenhouse or at home, can also cause the appearance of brown spots, which appear at the ends and edges, and spread over time. You have to provide adequate ventilation to closed places and use thin curtains or blinds to prevent the direct rays of the sun from entering, as well as to keep the plants away from the crystals, to prevent them from scorching. It is not advisable to water or spray a plant from above and less in the sun, to prevent the drops of water that remain on it from acting as magnifying glasses and causing burning.
Low temperatures and frost
Low temperatures and frost can cause brown areas, especially in the seedlings. Also, persistent foliage can turn brown. It is necessary to protect sensitive species as soon as the temperature begins to drop. The gusts of very strong air wither the leaves and cause them to brown. The windbreaker they will serve as effective protection.
Dry environment
The brittle and brown tips that can be observed in some indoor species reflect a lack of water, but can also be a symptom of an atmosphere that is too dry.
In these cases, an increase in irrigation is imposed, not in the amount of water, but in the frequency, as well as a higher humidity, by spraying on the foliage or by placing a bowl with water and pebbles or a humidifier nearby.
Continuous friction, if the plant is in a passage area, and cold air currents too, can cause the appearance of brown spots. Species should be kept away from the windows when the house is to be ventilated and not placed in a frequent place where their foliage is brushed by.
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