Why autumn feeding should not be automatic
The mild Mediterranean climate of the area allows many plants to remain active in autumn, but not all have the same demands. A newly planted hedge, a mature olive tree and potted herbs do not compete for the same nutrients or respond in the same way to an extra input. Applying a general fertiliser to the whole garden mixes very different situations and usually produces excess where none was needed.
Before buying bags, it is worth asking concrete questions: was there weak growth in spring? Are there localised yellowing leaves? Does the soil waterlog or dry out too quickly? These signs are more useful than any fixed calendar.
- Note in a notebook what you see in each part of the garden before deciding on feeding.
- Do not compare plants of different species: each one sets its own pace.
Reading the soil with your hands and eyes
Taking a handful of earth from about ten centimetres down says a lot. If it compacts and stays like paste, drainage is poor and heavy feeding can make the problem worse. If it crumbles easily and smells of damp earth, the structure is working. If it is very dry and dusty beneath the surface, watering may not be reaching where it should.
Observing the surface also helps: whitish crusts, persistent moss in shaded areas or repeated cracks indicate conditions that should be corrected before adding nutrients. In many cases, improving organic matter and irrigation solves more than an additional fertiliser.
- Do the handful test in several areas, not just one.
- Check the soil two or three days after rain or a deep watering.
Distinguishing a real deficiency from other problems
Yellowing does not always mean a lack of fertiliser. In autumn, after the first rains, symptoms appear from excess water, compaction or shade that look very much like a deficiency. The difference usually lies in the pattern: if yellowing affects new leaves uniformly, it points towards an input; if it appears in low areas or next to waterlogged spots, it points to a soil problem.
It is also worth ruling out damage from salinity in watering with hard water, very common in gardens by the sea. In that case, feeding more makes the situation worse. Watering deeply and checking water quality is the first step.
What to add and when in autumn
If observation confirms that an input is needed, well-decomposed organic matter is usually a safe base: it improves structure, retains moisture and does not overload. Apply it on the surface, around the plant, without burying it too deeply. In pots, it is better to renew part of the growing medium rather than add concentrated fertilisers.
Timing matters. After the rains of October and November, with the soil still warm, plants make better use of inputs than if they are applied in intense heat. In contrast, in midwinter activity slows and the fertiliser may go unused. A professional from a gardening company in Estepona can adjust the calendar to each part of the garden without applying a single recipe.
- Spread organic matter evenly and do not pile it against the trunk.
- In pots, replace the top layer of growing medium instead of adding fertiliser on top of fertiliser.
Common mistakes to avoid
One of the most common mistakes is feeding just before heavy watering or strong rain: part of the input is lost by leaching and ends up where it should not. Another is feeding newly transplanted plants, which do not yet have active roots to make use of it. It is also common to feed hedges and shrubs without first checking the irrigation system: if water does not reach evenly, the fertiliser concentrates where it is not needed.
In gardens in Sotogrande and Marbella, with large plots and sector-based irrigation, it is worth checking uniformity before feeding. A small adjustment to irrigation often has more effect than an extra bag of fertiliser.
A practical criterion for the owner
Before feeding, it is worth answering three questions: how is the soil? What signs are the plants showing? Is the irrigation working well? If any answer is doubtful, the priority is to correct that, not to add nutrients. This gardening in Sotogrande and its surroundings relies more on observation than on impulsive buying of products.
A simple routine is to review the garden after the autumn rains, note what you observe and decide by areas. That way, feeding becomes a reasoned decision rather than a calendar task.