Where there is no open soil, containers turn a balcony, terrace, or paved yard into a growing surface. The method is forgiving for beginners and well suited to flats, but it does shift the balance of work: a pot holds far less water and nutrient reserve than open ground, so attention to watering and feeding becomes the main task.
Matching the pot to the crop
The recurring beginner mistake is a pot that is too small. Roots fill a container quickly, and a cramped plant dries out and stalls. As a general guide, leafy crops and herbs tolerate shallower containers, while fruiting plants and anything deep-rooted want a noticeably larger volume.
- Herbs and salad leaves: shallow troughs and window boxes are workable.
- Bush tomatoes, peppers, chillies: a single large pot per plant.
- Root crops: deeper containers so the root has room to form.
Growing medium
Garden soil alone compacts badly in pots and drains poorly. A container mix based on quality potting compost, loosened with material that keeps it open, holds moisture while still letting excess water pass through. Because containers are watered often, nutrients leach out over time, so a long-season crop usually needs feeding once it is established.
Watering through warm spells
On a sunny balcony in mid-summer, pots can need water daily, and small pots sometimes twice. Grouping containers together reduces how quickly each one dries, and a layer of mulch on the surface slows evaporation. Watering in the cooler parts of the day wastes less to evaporation than watering at midday.
Light and exposure
Balconies vary enormously. A south-facing balcony can be hot and bright enough for fruiting crops, while a north or heavily shaded aspect suits leafy greens and herbs that cope with less direct sun. Wind is the other factor at height: exposed balconies dry out faster and may need taller plants staked or sheltered.
General guidance on growing in containers is available from the Royal Horticultural Society. The related notes below cover beds and rotation.