Read the site before drawing the beds
Before buying plants it is worth spending several days watching the ground at different hours. On a plot close to the coast, the sea breeze softens temperatures but can dry leaves and harden the soil surface; a few metres inland, the same species may suffer more from night cold than from salt. That difference changes which vegetables make sense and when to sow them.
A useful exercise is to drive a stake into the intended garden spot and note for a week the time the sun reaches the soil and the time it disappears. A bed that receives full sun in the morning and shade from mid-afternoon behaves very differently from one that stores heat until dusk. In autumn, that early shade can favour lettuces and chard, while in spring it will delay the development of tomatoes and peppers.
Drainage deserves the same attention. Digging a hole about thirty centimetres deep and filling it with water shows how long it takes to filter away. If water remains stagnant for more than a day, the bed needs raising or a layer of gravel before planting. It is a common mistake to add fertile soil over ground that does not drain: the plant grows at first and then sickens from waterlogging in the first rains.
- Note the hours of sun and shade in each zone for a week before deciding on crops.
- Check drainage with a test hole after the first autumn rains.
Choose crops by season, not by habit
The Mediterranean garden has two clear periods: the cool cycle from autumn to spring and the warm cycle from spring to summer. In November, on the coast, cabbages, chard, spinach, broad beans and garlic make sense; inland, where frost is possible, it is better to delay the more sensitive sowings and protect the seedbeds. The temptation to repeat what worked in summer leads to planting tomatoes out of season and harvesting weak plants.
Rotation by family helps avoid exhausting the soil or building up problems. After a solanaceous crop such as tomato or pepper, it is reasonable to move to a legume such as broad beans, which adds nitrogen, or to a leafy green. No rigid scheme is needed: simply remember what was planted in each bed the previous season and avoid repeating it in the same spot.
Companion planting should also be decided with judgement. Aromatics such as rosemary or sage can go along the edges, where they attract insects and do not compete for water with the vegetables. By contrast, placing very thirsty plants next to dry-loving ones forces everything to be watered alike and usually harms those most sensitive to excess moisture.
- Rotate crop families between seasons to reduce soil exhaustion.
- Reserve the garden edges for aromatics that will not compete for water.
Living soil: organic matter and mulch in moderation
A well-managed Mediterranean soil is not the one that is fed most, but the one that keeps its structure and life. Adding well-decomposed organic matter in autumn, before the rains, lets water penetrate and roots explore. The usual mistake is to dig in fresh manure: it ferments, burns roots and attracts problems. Better to use mature compost, spread on the surface and lightly incorporated.
Mulch helps cushion evaporation and protects the surface from the impact of rain, but in a Mediterranean climate it should not be overdone in autumn. A thick layer over cold, wet soil can delay warming and encourage fungi. On the coast, where autumn is mild, a thin layer of plant remains is enough; inland, it is better to wait until the soil has aired after the first rains.
Texture is corrected with patience. A clay soil that cakes when dry improves with compost and by avoiding cultivation when wet. A sandy soil that loses water quickly holds it better with organic matter and light mulch. In both cases, walking on cultivated beds is a mistake that shows seasons later, when roots meet a compacted layer.
- Use mature compost, never fresh manure dug in beside the roots.
- Adjust mulch depth according to whether autumn is mild on the coast or cold inland.
Watering: less often, more observation
With the arrival of autumn, watering should become less frequent, though not always smaller in amount per turn. Watering daily out of habit keeps the soil damp at the surface and encourages shallow roots, which suffer as soon as a hot day arrives. It is better to water less often and check by hand ten centimetres down whether the soil still holds moisture.
At a second home, automatic irrigation needs reviewing after summer: misadjusted timers, blocked drippers or sprinklers wetting paths are frequent causes of waste. A well-placed drip line in the garden sends water to the base of each plant and leaves the paths dry, which reduces weeds and leaf diseases.
The time of day also matters. Watering at dawn reduces evaporation and lets leaves dry during the day. In autumn, with cooler nights, evening watering keeps moisture on the foliage too long and increases the risk of fungi in sensitive crops such as lettuces.
- Check moisture ten centimetres down before watering again.
- Review drippers and timers at the start of autumn, especially at second homes.
Seasonal upkeep and repeated mistakes
Autumn upkeep in the garden centres on three tasks: clearing remains of exhausted crops, lightly aerating the soil and watching for pests or diseases before they spread. Removing diseased leaves and dry stems reduces shelter for snails and aphids. It is not wise to leave the soil bare all winter, but nor should it be covered with a layer that stops it breathing.
A common mistake is to over-fertilise to make up for poor growth. Often the problem is water, compaction or exposure, not nutrients. Adding more fertiliser to a plant with waterlogged roots makes the damage worse. Another mistake is to prune shrubs and aromatics without judgement during a growth pause: hard pruning before cold can leave tissue exposed.
Weekly observation solves more than any recipe. Walking the garden calmly, lifting a leaf, looking at its underside and checking the state of the soil allows small decisions to be made in time. That steadiness, more than dramatic intervention, is what sustains a Mediterranean garden season after season. For anyone managing gardens and plots on the coast, a well-planned Garden and Swimming Pool Maintenance on the Costa del Sol service includes precisely that seasonal review; and in residential settings, gardening in Sotogrande rests on the same logic of observing before acting.
- Clear exhausted crop remains to reduce shelter for pests.
- Before fertilising, rule out problems with watering, compaction or exposure.