Growing in Containers: Balconies, Patios and Small Yards

Container growing is not a scaled-down version of garden growing. The constraints are different, and plants fail for reasons that would never affect the same plant in the ground.

Why containers are harder

• They dry out fast. A pot in summer sun can need water daily, sometimes twice.
• Nutrients run out. Compost is exhausted within weeks and there is nothing to replenish it.
• Roots overheat. Dark pots in direct sun get genuinely hot.
• There is nowhere for roots to go. A pot that is too small limits the plant permanently.

All four are manageable, but only if you know they exist.

Choosing pots

• Bigger than you think. Larger volumes hold moisture longer and are far more forgiving. Small pots are the single most common cause of container failure.
• Drainage holes are essential. Decorative pots without them kill plants. If you love the pot, grow in a plastic liner inside it.
• Material matters. Terracotta breathes and dries fast, and can crack in frost unless rated frost-proof. Glazed ceramic holds moisture better. Plastic is light, cheap and retains water well. Fabric pots drain and air-prune roots.
• Weight, if you are on a balcony. Wet compost is heavy, and balcony loading limits are real. Lighter materials and smaller counts matter here.

Watering

Judge by weight and by feel rather than by the surface, which dries first and misleads. Water thoroughly until it runs from the base, then leave it until it needs more — light frequent watering encourages shallow roots.

Saucers help in heat and cause rot in winter. Standing pots up on feet over the cold months prevents waterlogging.

If you are away often, a simple drip system on a timer is more reliable than any self-watering claim.

Feeding

Start feeding roughly six weeks after potting, and continue through the growing season. A general liquid feed covers most things; fruiting plants such as tomatoes benefit from a high-potassium feed once flowering starts. Slow-release granules mixed in at potting reduce the workload.

What does well in pots

Herbs, salad leaves, chillies, dwarf beans, strawberries and most compact bedding perform well. Tomatoes work in large containers with consistent watering. Root vegetables need depth. Anything that grows very large in the ground will be a struggle.

Check the light your space actually gets, measured across a day rather than assumed. A balcony that gets three hours of morning sun is a shade garden, and choosing shade-tolerant plants for it will work far better than fighting it.

Before you order

Check the pot has drainage holes. Check the volume rather than the width, since shallow wide pots hold much less than they appear to. Check the frost rating on terracotta and ceramic if pots stay out over winter. And check delivery terms on compost and large pots, since both are heavy and kerbside delivery means carrying them yourself.