At Casa y Deco, we love it when someone dares to create a garden at home, even in a limited space like a balcony. And if that balcony barely receives direct light, it complicates things but doesn't make it impossible. Trust us: you can grow delicious vegetables even if you only have two hours of sun a day, which is exactly what many balconies in cities with tall buildings or unfavourable orientations have.
The first thing we've discovered in our home experiments is that two hours of direct sun is enough for many edible plants. You don't need a greenhouse bathed in Mediterranean light. What you do need is to choose wisely what you grow, as not everything thrives in partial shade with the same enthusiasm. Honestly, this changed my perception of what was viable on an urban balcony.
The orientation of the balcony is your best ally in understanding how much real light it receives. If it faces north, the sun is filtered and diffuse. If it faces east or west, you'll catch those two valuable hours at dawn or dusk. South is ideal, but even there, if there's a building in front or large trees, things change. Observe your balcony for a whole week before planting anything. Note where direct light falls and when it disappears. This will save you from disappointments.
Among all the options we've tried, lettuce and spinach are practically unbeatable for partial shade. They need less than three hours of sun and grow quickly, in about 30 to 40 days. Plant them in pots at least 20 centimetres deep and water when the soil feels dry to the touch. I confess I watered mine every two days in summer, and it was a total success. The trick is not to let them dry out completely, but also not to waterlog them.
Swiss chard is a sister to spinach in terms of light requirements, and it lasts much longer because you can harvest leaf by leaf without uprooting the entire plant. It grows in about 50 days if you take care of it, and a single pot of 25 centimetres in diameter will provide you with greens for months. They are quite tolerant, so even if you forget to water one day, they won't throw a tantrum like some other plants might.
Here's a piece of advice we learned the hard way: parsley and other herbs are great for shade, but they need perfect drainage. Use pots with drainage holes and potting mix for herbs, not garden soil. Parsley takes a while to germinate, so be patient, but then it grows vigorously. Cilantro also does well in low light, although in very warm climates it tends to flower quickly. For thyme, oregano, and marjoram, these prefer more light, but they can survive with two decent hours.
Radishes are your secret weapon for shady balconies. They grow in 25 days, need little space, and just over an hour of direct sun. Plant them every two weeks in small pots, and you'll have a continuous harvest. They're perfect for blending into vegetable smoothies or salads, and when you pull them up, you leave space for the next cycle.
Now, if you're attracted to the idea of having tomatoes, we have to be honest: tomatoes want real sun, preferably four hours or more. There are varieties that tolerate partial shade like the Cherry, but they won't produce as they would with more light. If you only have two hours, it may not be your easiest option, although you can always try dwarf varieties in large 30-litre pots. We've done it, and they produce, but less than expected.
Dwarf green beans also fit in balconies with limited space and need at least three hours of light, so if you have two good concentrated hours, they can work. Plant them in 20-centimetre pots, two or three plants per pot, and let them climb with a bamboo stick. The harvest starts around 50 days and is generous if the plants are happy with the light you provide.
As for zucchinis and cucumbers, the reality is they need more light than a partially shaded balcony can offer. If you insist, grow them in pots of at least 40 litres, in the best two hours of sun of the day, and expect them not to be as productive as they should be. There are compact varieties designed for pots, so that helps to better size the cultivation.
Regarding the substrate, this is more important than it seems in balconies with little sun. Use quality soil, preferably garden substrate with compost already included. Poor, compacted soil will never yield good results, especially if light is limited. Plants need nutrients to compensate for that lack of solar energy. Mix universal substrate with 20 percent homemade compost if you have it, or buy specific substrate for vegetables.
Watering on shady balconies is different from sunny areas. Evaporation is lower, so you need less water, but the risk of fungi increases. Water in the morning, never at night, and aim for the base of the plants, not the leaves. If you see mould or strange spots on the leaves, it's a sign of excessive moisture. Reduce watering and improve ventilation by moving the pots if you can.
A trick we've used at Casa y Deco to make the most of those two hours of light is to use light-coloured pots or reflective materials. White and light grey bounce light back to the plant. It sounds crazy, but it works. Dark terracotta pots absorb heat and light, which is not ideal in these conditions. Also, place the pots where they actually receive sunlight, not in the shade. If you have a corner that gets direct light for two hours and the rest of the balcony is in shadow, concentrate your more light-demanding crops there.
Finally, be realistic about your expectations. A partially shaded balcony will never give you the abundance of a full sun garden, but you'll be surprised at how much fresh produce you can harvest. Start with lettuce, Swiss chard, and herbs, which are practically foolproof. Once you gain confidence, experiment with radishes and beans. And if your balcony ever gets more hours of sun, you'll already know what to do.
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