Plants respond immediately to care mistakes that are easily avoidable. Before you assume you have a black thumb, it’s worth reviewing daily habits that, without you realising, may be weakening them.
Plant expert Maria Ferrarotto explains that many of the most common problems, such as brown or dry leaves, don’t appear overnight, but are the direct result of several accumulated faults in watering, the potting mix, placement or maintenance. The big question is often whether to remove them immediately or wait. At what point should this be done?
Brown leaves, the most common warning sign
Brown or dry leaves are usually the first visible sign that something is not right. In many cases, they indicate prolonged under-watering, although they can also be caused by sunburn from direct sunlight or an environment that is too dry.
Maria Ferrarotto, known as @ladoctoradelasplantas on social media, insists on not waiting until the plant is at breaking point. When a leaf begins to lose turgor or dry at the edges, it is still possible to reverse the situation with a proper watering and adjustments to its placement.
Failing to water on time, a mistake hard to correct
One of the most common faults is forgetting to water and resuming care when the plant is already severely damaged. Plants need consistency, not large amounts of water in sporadic bursts.
When the substrate remains dry for too long, the leaves dehydrate, become brittle and eventually drop. Watering on time allows the leaves to regain hydration and new shoots to develop normally.
The inappropriate substrate weakens the plant
Another common reason behind dry or yellowing leaves is that the substrate has become compacted or does not retain enough moisture. A poor soil mix prevents the roots from absorbing water and nutrients properly.
Maria Ferrarotto explains that a good potting mix should be airy, nutritious and allow drainage. When these conditions are not met, the plant quickly shows signs of stress, even if you water regularly.
Leaving dry leaves promotes pests and diseases
Not removing dry leaves is a more serious error than it might seem. These leaves accumulate dust and can become a refuge for insects and pests that later spread to healthy parts of the plant.
Removing dry leaves regularly helps prevent premature damage, improves air circulation and allows the plant to focus its energy on growing new, healthy leaves. Do it as soon as possible.
The dust on leaves reduces photosynthesis
The dust on leaves cannot perform photosynthesis correctly. This means the plant utilises light and CO₂ from the environment less efficiently, slowing its growth and gradually weakening it.
Cleaning the leaves regularly is simple yet fundamental care, especially for indoor plants and for species with large or glossy leaves, such as orchids or syngoniums.
Remember you don’t need specialist products to clean the leaves, and you can do it with items you already have at home.
Decorating with stones can be suffocating
Covering the substrate with large stones or glued decorative elements is another common mistake. While it may look attractive, this practice prevents the substrate from breathing and encourages moisture buildup or, alternatively, irregular evaporation.
According to Maria Ferrarotto, objects covering the substrate can cause the roots to suffocate and the leaves to start drying and dropping without an apparent cause.
Pots with poor drainage
A pot with few drainage holes or with these blocked can cause waterlogging at the bottom, even if the surface appears dry. This directly affects the roots, which do not tolerate excess water accumulation.
Poor drainage, combined with compacted substrate, is one of the main causes of brown leaves, leaf drop and general decline of the plant. Therefore, before repotting any plant into a new pot, you should ensure there is a bottom layer of gravel or perlite to enable drainage.
Moving the plant outdoors without acclimatisation
Changing an indoor plant to the outdoors without a transition can shock it. Sudden exposure to direct sun often causes leaf burn, particularly for species that prefer indirect light.
Maria Ferrarotto stresses the importance of respecting each plant’s needs and gradually adjusting its location to avoid unnecessary damage.
